CN209311599U - A kind of optical electro-chemistry system electrical parameters detection device - Google Patents
A kind of optical electro-chemistry system electrical parameters detection device Download PDFInfo
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- CN209311599U CN209311599U CN201821959069.7U CN201821959069U CN209311599U CN 209311599 U CN209311599 U CN 209311599U CN 201821959069 U CN201821959069 U CN 201821959069U CN 209311599 U CN209311599 U CN 209311599U
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Abstract
The utility model discloses a kind of optical electro-chemistry system electrical parameters detection devices, including the first electrolysis system, second electrolysis system, salt bridge, ammeter, switch, lighting source, data acquisition device and computer, first electrolysis system and the second electrolysis system include electrolytic cell, working electrode, reference electrode, to electrode and potentiostat, the working electrode of first electrolysis system and the working electrode of the second electrolysis system are respectively optoelectronic pole and scotomete, the working electrode, reference electrode and electrode is placed in electrolytic cell, the working electrode, reference electrode and to electrode respectively with potentiostat be electrically connected.The setting that the utility model passes through two potentiostats and ammeter, the function of realizing while measuring photoelectricity electrode potential in optical electro-chemistry system, scotomete potential and photoelectric current direction size controls corresponding electrode potential variation in the coupling of light-scotomete and research coupling process by the setting of switch.
Description
Technical field
The utility model relates to PhotoelectrochemicalTechnique Technique field, more specifically to a kind of applied to optical electro-chemistry system
Detection device.
Background technique
With the rapid development of society, the energy that the whole world consumes every year is continuously increasing.Currently, fossil fuel is supplied
The whole world is more than 80% energy consumption, and combustion of fossil fuels is also made other than reducing its storage capacity and causing energy crisis in large quantities
At CO2It is a large amount of discharge and lead to serious problem of environmental pollution.Energy crisis and environmental pollution are institutes, current mankind society
The double challenge being faced with.Solar energy is the available clean energy resource the most abundant of the mankind, and the energy per second for reaching the earth is big
About 1.73 × 1017Watt, be the consumed energy of the whole mankind (14 TW terawatts, 1.4 × 1013Watt) more than 10,000 times.
It is considered as solving the problems, such as current energy problem and environmental degradation most using the synthesis of Driven by Solar Energy optical electro-chemistry
Fundamental way, improving the utilization efficiency of solar energy, just interior suction draws extensive research in the world.So, one is accurately evaluated
The performance of a optical electro-chemistry system and to illustrate the research that photoelectrochemical process therein synthesizes optical electro-chemistry be to Guan Chong
It wants.
One optical electro-chemistry system contains at least one semiconductor photoelectrode and a scotomete.Currently, most of
Research work be size by measuring photoelectric current respectively and under light illumination the variation of photoelectricity electrode potential (open circuit potential OCP) comment
Estimate the performance of entire optical electro-chemistry system.However, research institute obtains photoelectric current at present and the experimental result of open circuit potential is not
Synchro measure.Most of semiconductor is likely to during the test photoetch occurs and causes the change of surface nature
Change.Therefore, in the successively experiment of measurement photoelectric current and open circuit potential, experimental result can be caused because of the photoetch of electrode
Error and inaccuracy.Importantly, optical electro-chemistry synthesis needs the half-reaction for driving two electrodes to be possible to carry out.Whole
In a system, the potential of scotomete (to electrode) for the separation of photo-generated carrier, the direction of carrier flow and another
The influence of feasibility and speed that half-reaction carries out is very significant.That is, the property such as potential of scotomete (to electrode)
Matter is practical to play an important role for optical electro-chemistry synthesis.But in current electrochemical test method, the electricity of scotomete
Gesture is but ignored and is not measured.This allows for current research to the endless of the characterization of entire optical electro-chemistry system performance and evaluation
Whole property and inaccuracy.
Utility model content
Technical problem to be solved by the utility model is: provide one kind can simultaneously one optical electro-chemistry system of Accurate Determining
In each electrode potential and the detection device of photoelectric current that flows through.
The solution that the utility model solves its technical problem is:
A kind of optical electro-chemistry system electrical parameters detection device, including the first electrolysis system, the second electrolysis system, salt bridge, electricity
Flow table, switch, lighting source, data acquisition device and computer, first electrolysis system and the second electrolysis system are equal
Including electrolytic cell, working electrode, reference electrode, to electrode and potentiostat, the working electrode of first electrolysis system with
And second the working electrode of electrolysis system be respectively optoelectronic pole and scotomete, the working electrode, reference electrode and to electricity
Pole is placed in electrolytic cell, the working electrode, reference electrode and to electrode respectively with potentiostat be electrically connected, two institutes
It states potentiostat and ammeter to be connected with data acquisition device input terminal respectively, the output end and meter of the data acquisition device
Calculation machine is connected, and the working electrode of first electrolysis system and the working electrode of the second electrolysis system are electrically connected, the switch
And ammeter is connected on the connection circuit of two working electrodes, the electrolytic cell of first electrolysis system passes through salt bridge and the
The electrolytic cell of two electrolysis systems is connected, electrolytic cell output illumination of the lighting source to the first electrolysis system.
As a further improvement of the above technical scheme, the working electrode of first electrolysis system is using semiconductor material
What material was prepared, the working electrode of second electrolysis system is prepared using metal material.
As a further improvement of the above technical scheme, the lighting source is xenon lamp.
As a further improvement of the above technical scheme, the technical program further includes optical chopper, the optics copped wave
Device is placed between the electrolytic cell and lighting source of the first electrolysis system.
The beneficial effects of the utility model are: setting of the utility model by two potentiostats and ammeter, real
The function of now measuring photoelectricity electrode potential in optical electro-chemistry system, scotomete potential and photoelectric current direction size simultaneously, by opening
Corresponding electrode potential variation in setting control light-scotomete coupling of pass and research coupling process, the technical program can
It preferably studies the reaction mechanism in optical electro-chemistry system and preferably evaluates the performance of optoelectronic pole.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described.Obviously, described attached drawing is a part of the embodiment of the utility model, rather than complete
Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it
His design scheme and attached drawing.
Fig. 1 is the apparatus structure schematic diagram of the utility model；
Fig. 2 is the test result schematic diagram of the utility model.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the application, specific structure and generation clear
Chu is fully described by, to be completely understood by the purpose, feature and effect of the application.Obviously, described embodiment is this Shen
A part of the embodiment please, rather than whole embodiments, are based on embodiments herein, and those skilled in the art is not paying
Other embodiments obtained under the premise of creative work belong to the range of the application protection.In addition, be previously mentioned in text
All connection relationships not singly refer to that component directly connects, and referring to can be according to specific implementation situation, by adding or reducing connection
Auxiliary, Lai Zucheng more preferably connection structure.Each technical characteristic in the invention, under the premise of not conflicting conflict
It can be with combination of interactions.
Referring to Fig.1, in order to solve, " current research is imperfect to the characterization of entire optical electro-chemistry system performance and evaluation
Property and inaccuracy " this problem, the technical program proposes one can be each in one optical electro-chemistry system of Accurate Determining simultaneously
The research method of the potential of a electrode and the photoelectric current flowed through simultaneously establishes relevant test device.The present invention can be used as to existing
The supplement of optical electro-chemistry test method is expected to be widely used in optical electro-chemistry research field in the future.
This application discloses a kind of optical electro-chemistry system electrical parameters detection devices, including first the 100, second electricity of electrolysis system
Enzymatic hydrolysis system 200, salt bridge 300, ammeter 400, switch 500, lighting source 600, data acquisition device and computer, described
One electrolysis system 100 and the second electrolysis system 200 include electrolytic cell 110, working electrode 120, reference electrode 130, to electricity
Pole 140 and potentiostat, the work electricity of the working electrode 120 of first electrolysis system 100 and the second electrolysis system 200
Pole 120 is respectively optoelectronic pole and scotomete, the working electrode 120, reference electrode 130 and is placed in electricity to electrode 140
Solve pond 110 in, the working electrode 120, reference electrode 130 and to electrode 140 respectively with potentiostat be electrically connected, two
The potentiostat and ammeter 400 are connected with data acquisition device input terminal respectively, the output of the data acquisition device
End is connected with computer, the working electrode 120 of the working electrode 120 of first electrolysis system 100 and the second electrolysis system 200
It is electrically connected, the switch 500 and ammeter 400 are connected on the connection circuit of two working electrodes 120, first electricity
The electrolytic cell 110 of enzymatic hydrolysis system 100 is connected by salt bridge 300 with the electrolytic cell 110 of the second electrolysis system 200, the illumination light
Electrolytic cell 110 output illumination of the source 600 to the first electrolysis system 100.
Wherein the salt bridge 300 is specifically 1mol/LKCL (potassium chloride) agar bridge 300；The data acquisition dress
It sets and is mainly used for being converted into digital quantity to the electrical parameter analog quantity inputted, facilitate computer to be handled, while the data
Acquisition device is also configured with store function, and data acquisition device may include that multiple National Instruments are raw in practical application
Production E series or M series multifunctional data acquisition card, for acquire electrode potential data measured by two potentiostats and
Photoelectric current size is flowed through, realizes the synchro measure to the multiple parameters of multiple optical electro-chemistry systems and acquisition；And the computer
Configured with IgorPro test program, which is the potential and electric current for relevant two electrodes of recording and storage.Multiple numbers
It is synchronous progress according to acquisition, speed, quantity and the total testing time of acquisition realize control by IgorPro program.
The technical program is realized by the setting of two potentiostats and ammeter 400 while measuring optical electro-chemistry body
It is dark to control light-by the setting of switch 500 for the function of photoelectricity electrode potential, scotomete potential and photoelectric current direction size in system
Corresponding electrode potential variation, the technical program can preferably study optical electro-chemistry in the coupling of electrode and research coupling process
The performance of reaction mechanism and preferably evaluation optoelectronic pole in system.
It is further used as preferred embodiment, in the application specific embodiment, in first electrolysis system 100,
Working electrode 120 is prepared using semiconductor material, using Pt electrode and silver/silver chloride electrode as to electrode
140 and reference electrode 130.It is contained with solution in electrolytic cell 110 in practical application, to the part of electrode 140 and reference electrode 130
Or be fully inserted into solution, 110 bottom of electrolytic cell is equipped with opening, and working electrode 120 is placed in 110 lower section of electrolytic cell to block
The opening of 110 bottom of electrolytic cell, the link position between electrolytic cell 110 and working electrode 120 are equipped with sealing ring to improve fixation
With antiseep effect；And the difference of the second electrolysis system 200 and the first electrolysis system 100, only in the work of the second electrolysis system 200
Make electrode 120 and be prepared using metal material, and the solution that electrolytic cell 110 is held in the second electrolysis system 200 with
The solution that electrolytic cell 110 is held in first electrolysis system 100 is different.
It is further used as preferred embodiment, in the application specific embodiment, the lighting source 600 is xenon lamp.
It is further used as preferred embodiment, in the application specific embodiment, the detection device further includes optics
Chopper, the optical chopper are placed between the electrolytic cell 110 and lighting source 600 of the first electrolysis system 100.This is practical new
Type is by the setting of optical chopper, to realize the periodical switching of light dark to study the cyclically-varying of light dark electric current.
The operating procedure of the technical program is as follows:
Step 1, the first electrolysis system 100 and the second electrolysis system 200 are assembled by above structure, is electrolysed respectively at two
Corresponding solution is added in pond 110, is connected using salt bridge 300；
Step 2, the electrolytic cell 110 of the first electrolysis system 100 is placed in below xenon lamp, and an optical chopper is put
It sets between xenon lamp and electrolytic cell 110, using conducting wire by the working electrode 120 and the second diel of the first electrolysis system 100
It is that 200 working electrode 120 is joined together to form circuit, a switch 500 is installed on this current loop with realization pair
The control of the conducting of two electrodes connects a small resistance and an ammeter 400 on this current loop, for measure stream in
Photoelectric current between two working electrodes 120；
Step 3, by the working electrode 120 of the first electrolysis system 100 and the second electrolysis system 200, to electrode 140 and ginseng
It is linked into two potentiostats than electrode 130, the potential data that potentiostat measures is input to data acquisition device；
Step 4, potentiostat is opened, IgorPro program is opened, opens xenon lamp and optical chopper.Set the speed of sampling
Degree and total time of measuring, run IgorPro program；
Step 5, after measurement, xenon lamp is closed, closes optical chopper, storing data unloads electrolytic cell 110.
It is described in detail as an example with a specific optical electro-chemistry system below.
It is decomposed in aqueous systems in optical electro-chemistry, uses 0.5mol/L Na2SO4For electrolyte, using N-shaped ZnO as optoelectronic pole,
Pt electrode as scotomete, by the technical program Simultaneous Determination ZnO electrode, Pt electrode potential and to flow through two work electric
The photoelectric current of pole 120, to confirm the feasibility and reliability of the technical program.
Specific experiment is shown in steps are as follows:
(1) by the 0.5mol/L Na of 10ml2SO4+ 0.1mol/L ethanol solution pours into the electrolytic cell of the first electrolysis system 100
In 110, use diameter be 0.5mm platinum filament as to electrode 140 and an Ag/AgCl as reference electrode 130；In the second electricity
In the electrolytic cell 110 of enzymatic hydrolysis system 200, use the platinized platinum that a diameter is 6mm as working electrode 120 (scotomete), diameter is
The platinum filament of 0.5mm is used as to electrode 140 and an Ag/AgCl as reference electrode 130, is added in this electrolytic cell 110
0.5mol/L Na2SO4Solution；
(2) three electrodes of two electrolytic cells 110 are connect with potentiostat respectively；
(3) by two working electrodes 120 in two electrolytic cells 110 respectively with the dispatch from foreign news agency that is mounted with switch 500 and resistance
Road connection, meanwhile, so that switch 500, which is in an off state, flows through two electrodes to avoid electric current.
(4) xenon lamp is opened, optical chopper wouldn't be run, so that ZnO electrode is in dark state；
(5) two potentiostats are opened；
(6) IgorPro program is opened, sets sample rate as 0.2s/ sampling point, total time of measuring is 7200s, and is run
IgorPro program；
(7) maintaining current loop upper switch 500 is off-state, opens optical chopper, is measured in light dark period
Under conditions of variation, the potential change of ZnO optoelectronic pole, while the potential change of Pt scotomete is measured, because on current loop
Switch 500 be to disconnect, and no current flows through two working electrodes 120, so ZnO optoelectronic pole and Pt scotomete are nothing each other
Interference；
(8) 500 are closed a switch after 3600s, so that ZnO optoelectronic pole is connected to Pt scotomete, so that two electrodes of measurement connect
The variation of electrode potential after logical and coupling process, in addition, measurement flows through the photoelectric current of the two electrodes simultaneously.
Referring to Fig. 2, shown in Fig. 2 is specific measurement experiment as a result, the expression of (a) figure is to switch item in light dark period
Under part, the variation of optoelectronic pole and scotomete potential, what (b) figure indicated is optoelectronic pole and scotomete during 3400s to 3900s
The variation of potential, what (c) figure indicated is under light dark period switching condition, and the current density for flowing through optoelectronic pole and scotomete becomes
Change, what (d) figure indicated is the current density change that optoelectronic pole and scotomete are flowed through during 3400s to 3900s.Such as (a) figure
(c) shown in figure, in 0-3600s, the switch 500 positioned at current loop is disconnected, and it is dark that no electric current can flow to Pt from ZnO optoelectronic pole
Electrode, therefore, the potential of ZnO optoelectronic pole are followed by light dark and switch and cyclically-varying, and the potential of Pt scotomete is not exposed to
Light dark switching influence and remain stable；As shown in (b) figure, in 3600s, after the switch 500 on current loop is opened,
Since ZnO optoelectronic pole and Pt scotomete need to establish thermodynamical equilibrium, the potential of ZnO optoelectronic pole transits to 0.15V from -0.2V,
Because the electron concentration of Pt scotomete is more much bigger than semiconductor material, the potential of Pt scotomete only by minimal effect, by
0.2V transits to 0.15V, by this optical electro-chemistry test method, can accurately measure metal and semi-conducting electrode and contact
When electrode potential relative movement, and contact coupling after two electrode potentials size.In addition, being measured from Contact
Electric current it is found that establishing electric potential balancing in two electrodes of Contact and having no and cause the flowing of heavy current.From (b) figure it is found that
Under illumination condition, the potential of ZnO and Pt are negative simultaneously to be moved, but their photoelectricity potential difference is about -40mV, so that about -
30μA cm-2Light induced electron be injected into Pt electrode from ZnO.And under non-illuminated conditions, the potential difference of ZnO and Pt only have -2mV,
There is a small amount of electronics from Pt electrode inverse injection to ZnO electrode.It is answered by the test for decomposing aqueous systems to ZnO/Pt optical electro-chemistry
It can be applied successfully to measure in an optical electro-chemistry decomposition aqueous systems with the optical electro-chemistry test method for showing this project proposition
Each electrode potential and its in the potential difference and corresponding sense of current and size before and after contact and when light dark
Equal important informations provide a more comprehensive reliable method and apparatus for further investigation optical electro-chemistry synthesis.
The better embodiment of the application is illustrated above, but the invention is not limited to the implementation
Example, those skilled in the art can also make various equivalent modifications under the premise of without prejudice to the application spirit or replace
It changes, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (4)
1. a kind of optical electro-chemistry system electrical parameters detection device, it is characterised in that: including the first electrolysis system (100), the second electricity
Enzymatic hydrolysis system (200), salt bridge (300), ammeter (400), switch (500), lighting source (600), data acquisition device and meter
Calculation machine, first electrolysis system (100) and the second electrolysis system (200) include electrolytic cell (110), working electrode
(120), reference electrode (130), to electrode (140) and potentiostat, the working electrode of first electrolysis system (100)
(120) and the working electrode (120) of the second electrolysis system (200) is respectively optoelectronic pole and scotomete, the working electrode
(120), reference electrode (130) and electrode (140) is placed in electrolytic cell (110), the working electrode (120), reference
Electrode (130) and electrode (140) is electrically connected with potentiostat respectively, two potentiostats and ammeter
(400) it is connected respectively with data acquisition device input terminal, the output end of the data acquisition device is connected with computer, and described
The working electrode (120) of one electrolysis system (100) and the working electrode (120) of the second electrolysis system (200) are electrically connected, described
Switch (500) and ammeter (400) are connected on the connection circuit of two working electrodes (120), first electrolysis system
(100) electrolytic cell (110) is connected by salt bridge (300) with the electrolytic cell (110) of the second electrolysis system (200), the photograph
Electrolytic cell (110) output illumination of Mingguang City source (600) to the first electrolysis system (100).
2. a kind of optical electro-chemistry system electrical parameters detection device according to claim 1, it is characterised in that: first electricity
The working electrode (120) of enzymatic hydrolysis system (100) is prepared using semiconductor material, second electrolysis system (200)
Working electrode (120) is prepared using metal material.
3. a kind of optical electro-chemistry system electrical parameters detection device according to claim 1, it is characterised in that: the illumination light
Source (600) is xenon lamp.
4. a kind of optical electro-chemistry system electrical parameters detection device according to claim 1, it is characterised in that: further include optics
Chopper, the optical chopper are placed between the electrolytic cell (110) of the first electrolysis system (100) and lighting source (600).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821959069.7U CN209311599U (en) | 2018-11-26 | 2018-11-26 | A kind of optical electro-chemistry system electrical parameters detection device |
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| CN201821959069.7U CN209311599U (en) | 2018-11-26 | 2018-11-26 | A kind of optical electro-chemistry system electrical parameters detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444594A (en) * | 2018-11-26 | 2019-03-08 | 佛山科学技术学院 | A kind of optical electro-chemistry system electrical parameters detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444594A (en) * | 2018-11-26 | 2019-03-08 | 佛山科学技术学院 | A kind of optical electro-chemistry system electrical parameters detection device |
| CN109444594B (en) * | 2018-11-26 | 2023-12-26 | 佛山科学技术学院 | Photoelectrochemistry system electrical parameter detection device |
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