CN107447209A - A kind of method for preparing Pd Co P composite membranes using chemical plating displacement - Google Patents

A kind of method for preparing Pd Co P composite membranes using chemical plating displacement Download PDF

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Publication number
CN107447209A
CN107447209A CN201710487486.XA CN201710487486A CN107447209A CN 107447209 A CN107447209 A CN 107447209A CN 201710487486 A CN201710487486 A CN 201710487486A CN 107447209 A CN107447209 A CN 107447209A
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chemical plating
displacement
liquid
plating
composite membranes
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CN201710487486.XA
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CN107447209B (en
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杜荣斌
周峰
刘涛
夏宏宇
王伟
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Anqing Normal University
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Anqing Normal University
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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/48Coating with alloys
    • C23C18/50Coating with alloys with alloys based on iron, cobalt or nickel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/14Phosphorus; Compounds thereof
    • B01J27/185Phosphorus; Compounds thereof with iron group metals or platinum group metals
    • B01J27/1856Phosphorus; Compounds thereof with iron group metals or platinum group metals with platinum group metals
    • B01J35/33
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90Selection of catalytic material
    • H01M4/92Metals of platinum group
    • H01M4/921Alloys or mixtures with metallic elements
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

Abstract

A kind of method for preparing Pd Co P composite membranes using chemical plating displacement of the present invention, comprises the following steps:First with the methylimidazole chlorine (BMIMCl) of 1 butyl 3, liquid containing cobalt ions [BMIM] CoCl3And sodium hypophosphite NaH2PO2As chemical plating raw material, a small amount of DMH keeps certain temperature and mixing speed, chemical plating is carried out on graphite cake, gained chemistry plating piece is put into Ch containing palladium ionic liquids as cosolvent2PdCl4Displacement liquid in, under stirring action and certain temperature, immersion obtain Pd Co P composite membranes, the 3D network architectures are presented in composite membrane obtained by this method, with higher electro catalytic activity and durability, and process conditions require low, are a kind of more promising film catalyst preparation technologies.

Description

A kind of method that Pd-Co-P composite membranes are prepared using chemical plating-displacement
Technical field
The present invention relates to a kind of method that Pd-Co-P composite membranes are prepared using chemical plating-displacement, belong to catalyst preparation skill Art field.
Background technology
It is widely studied at present that active component or chief active group are mainly used as using Pt with the fuel-cell catalyst of application The catalyst divided.But Pt is expensive, anti-poisoning capability is poor, and the fast development and popularization to fuel cell are provided with obstacle. Therefore, new no-Pt catalyst is explored and develops to be of great significance the commercialization process tool for promoting fuel cell.Pd It is the preferable selection for substituting Pt, Pd is preferable in catalytic process moderate resistance poisoning capability, and price is only Pt half, in fuel cell Field has a good application prospect.How further to improve Pd catalytic performance is the key that Pd can replace Pt catalyst.People Generally use other metals are introduced into pure Pd or nonmetallic method is modified to it.The focus studied at present adds your non-gold Category element is Co, Ni etc., at room temperature with double Pd-Co alloy catalysts its oxygen reduction catalytic activities under the same conditions with polycrystalline Pt is sufficiently close to, and the ability poisoned with preferable methanol tolerance.Some nonmetallic doping can also promote Pd catalytic Energy.Addition such as P can improve electro catalytic activity and stability of the Pd catalyst to Oxidation of Formic Acid.By these elements compoundings add Into Pd, it is expected to obtain more preferable catalytic performance.But it is difficult due to preparing, it is more than ternary or ternary compound on being carried out in Pd The report of film is also seldom.
The present invention is prepared for Pd-Co-P composite membranes, obtained composite membrane in ionic liquid using chemical plating-displacement method With very high mechanical strength, electric conductivity and good catalytic activity, and process is simple and environmentally-friendly, is a kind of more promising Polynary Pd group compound films preparation method.
The content of the invention
Based on problem present in background technology, the invention provides Pd-Co-P composite membranes are prepared in a kind of ionic liquid Method.The purpose of this method is formed in realizing the addition base metal Co and nonmetallic P into Pd by chemical plating-displacement method Pd-Co-P composite membranes with good catalytic and use value, while provide a kind of technique simple production method.
A kind of method that Pd-Co-P composite membranes are prepared using chemical plating-displacement proposed by the present invention, in electroless plating tank, Add ionic liquid 1-butyl-3-methyl imidazolium chlorine (BMIMCl), liquid containing cobalt ions [BMIM] CoCl3, sodium hypophosphite NaH2PO2And DMH (DMH) is used as chemical plating fluid, the scattered stirring of ultrasonic wave, chemical plating is carried out on graphite cake, is obtained Co-P alloy plating pieces;Choline Chloride and urea (mol ratio 1 are added in reaction vessel is replaced:2) anhydrous low melting point mixing is molten Agent, Ch containing palladium ionic liquids2PdCl4As displacement liquid, Co-P alloy plating pieces are put into displacement liquid and soak a period of time, be made Pd-Co-P composite membranes.
Preferably, component composition of the Co-P chemical plating fluids based on mass volume ratio:Liquid containing cobalt ions [BMIM] CoCl3For 6~30g/L, sodium hypophosphite NaH2PO2It is 0~5g/L for 1.5-6g/L, DMH (DMH).Chemical plating fluid temperature is 70- 100 DEG C, mixing speed is 200-400 rpms, electroless plating time 20-40 minutes.
Preferably, Ch containing palladium ionic liquids in displacement liquid2PdCl4For 3~8g/L, alloy plating piece soaks 3- in displacement liquid 8h, temperature are kept for 80~100 DEG C, and mixing speed is controlled in 150rm.
A kind of method that Pd-Co-P composite membranes are prepared using chemical plating-displacement, it is comprised the following steps that:
Step 1, using pretreated graphite cake as depositing base, take a certain amount of ionic liquid 1- butyl -3- methyl Imidazoles chlorine (BMIMCl) is put into coating bath, and a certain amount of liquid containing cobalt ions [BMIM] is then separately added into ionic liquid CoCl3, sodium hypophosphite NaH2PO2And a small amount of DMH (DMH), the scattered stirring of ultrasonic wave, changed on graphite cake Learn plating;Take out plating piece and use ethanol and deionized water rinsing successively, dry up, produce Co-P alloy layers.
Specific reaction equation is as follows:
3H2PO2 =H2PO3 -+2P↓+H2O+2OH-
H2PO2 -+H2O=H2PO3 -+H2
CoCl3 -+H2PO2 -+H2O=Co ↓+H2PO3 -+2HCl+Cl-
Step 2, in inert-gas environment, take a certain amount of, take a certain amount of Choline Chloride and urea (mol ratio 1:2) nothing Water low melting point mixed solvent is put into displacement reaction vessel, is then separately added into low melting point in the mixed solvent containing palladium ionic liquids Ch2PdCl4, the alloy plating piece that step 1 obtains is put into displacement liquid and soaked, Pd-Co-P composite membranes are made by replacing to react. The chemical reaction that replacement process occurs is as follows:
[PdCl4]-2+Co→Pd+CoCl3 -
The lower metallic cobalt displacement Pd using on matrix belongs to kinetics and controlled for diffusion in ionic liquid, so instead Answer temperature critically important, temperature is too low, is unfavorable for reaction and carries out, too high, then considers energy consumption, selecting 80~100 DEG C is advisable.
It is characteristic of the invention that:
(1) present invention is effectively adjusted Pd-Co-P composite membrane geometry, electronics and surface texture, is in due to Co, P addition The existing 3D network architectures, make it have higher electro catalytic activity and durability.
(2) present invention process is simple, and raw material is easy to get, and it is easy to prepare, and cheap, energy consumption is smaller.
Brief description of the drawings
Fig. 1 is the compound membrane preparation device figures of Pd-Co-P for the present invention.
Fig. 2 is the surface topography map of Pd-Co-P composite membranes in the present invention.
Embodiment
With reference to embodiment, the invention will be further described.
Step 1, as shown in Figure 1, graphite cake matrix is subjected to the pretreatment procedures such as alkaline degreasing, pickling, washing, drying Depositing base is used as afterwards, takes 250mL ionic liquid 1-butyl-3-methyl imidazolium chlorine (BMIMCl) to be put into coating bath, Ran Houxiang 10g liquid containing cobalt ions [BMIM] CoCl is separately added into ionic liquid3, 3g sodium hypophosphites NaH2PO2And 0.5 gram of dimethyl Glycolylurea (DMH), ultrasonic wave disperses, and mixing speed is 300 rpms, and temperature is kept for 85 DEG C carry out chemical plating 30 minutes;Take out Plating piece uses ethanol and deionized water rinsing successively, drying, produces Co-P alloy layers.
Step 2, in inert-gas environment, take 300mL Choline Chloride and urea (mol ratio 1:2) anhydrous low melting point mixing Solvent is put into displacement reaction vessel, is then separately added into 1.5g Ch containing palladium ionic liquids to low melting point in the mixed solvent2PdCl4, The alloy plating piece that step 1 obtains is put into displacement liquid, temperature is kept for 85 DEG C, and mixing speed control is in 150rm, immersion 4h, Pd-Co-P composite membranes are made.Using cyclic voltammetric technology, to prepared catalyst in alkaline environment to the electricity of methanol Oxidation catalytic activity is tested, and Methanol Anode oxidative peak current density reaches 98mA/cm-2, and show preferably stable Property.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.

Claims (3)

  1. A kind of 1. method that Pd-Co-P composite membranes are prepared using chemical plating-displacement, it is characterised in that:In electroless plating tank, add Ionic liquid 1-butyl-3-methyl imidazolium chlorine (BMIMCl), liquid containing cobalt ions [BMIM] CoCl3, sodium hypophosphite NaH2PO2With And DMH (DMH) is used as chemical plating fluid, the scattered stirring of ultrasonic wave, chemical plating is carried out on graphite cake, obtains Co-P alloys Plating piece;Choline Chloride and urea (mol ratio 1 are added in reaction vessel is replaced:2) anhydrous low melting point mixed solvent, containing palladium from Sub- liquid Ch2PdCl4As displacement liquid, Co-P alloy plating pieces are put into displacement liquid and soak a period of time, obtained Pd-Co-P is answered Close film.
  2. 2. the method according to claim 1 that Pd-Co-P composite membranes are prepared using chemical plating-displacement, it is characterised in that: Component composition of the Co-P chemical plating fluids based on mass volume ratio:Liquid containing cobalt ions [BMIM] CoCl3For 6~30g/L, hypophosphorous acid Sodium NaH2PO2It is 0~5g/L for 1.5~6g/L, DMH (DMH).Chemical plating fluid temperature is 70-100 DEG C, mixing speed For 200-400 rpms (rm), electroless plating time 20-40 minutes.
  3. 3. the method according to claim 1 that Pd-Co-P composite membranes are prepared using chemical plating-displacement, it is characterised in that:Put Change Ch containing palladium ionic liquids in liquid2PdCl4For 3~8g/L, alloy plating piece soaks 3-8h in displacement liquid, and temperature keeps 80~100 DEG C, mixing speed is controlled in 150rm.
CN201710487486.XA 2017-06-23 2017-06-23 Method for preparing Pd-Co-P composite membrane by utilizing chemical plating-displacement Active CN107447209B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113373345A (en) * 2021-06-07 2021-09-10 中氢新能(北京)新能源技术研究院有限公司 Supported superfine PtCoP ternary alloy nanoparticle for electrocatalytic methanol oxidation and preparation method thereof
CN114425332A (en) * 2022-02-24 2022-05-03 河南科技大学 Preparation method and application of Au-Pd micro-flowers constructed by ultrathin nanosheets

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104409745A (en) * 2014-11-19 2015-03-11 中国科学院长春应用化学研究所 Preparation method of high-performance superlow-palladium-capacity anode electrocatalyst Pd-CoP/C of direct formic acid fuel cell
US20150203968A1 (en) * 2014-01-17 2015-07-23 National Central University Method for treating metal surface
CN106521581A (en) * 2016-10-12 2017-03-22 安庆师范大学 Method for preparing Ni-Cr-P alloy clad layer through ionic liquid electroplating technology

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150203968A1 (en) * 2014-01-17 2015-07-23 National Central University Method for treating metal surface
CN104409745A (en) * 2014-11-19 2015-03-11 中国科学院长春应用化学研究所 Preparation method of high-performance superlow-palladium-capacity anode electrocatalyst Pd-CoP/C of direct formic acid fuel cell
CN106521581A (en) * 2016-10-12 2017-03-22 安庆师范大学 Method for preparing Ni-Cr-P alloy clad layer through ionic liquid electroplating technology

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113373345A (en) * 2021-06-07 2021-09-10 中氢新能(北京)新能源技术研究院有限公司 Supported superfine PtCoP ternary alloy nanoparticle for electrocatalytic methanol oxidation and preparation method thereof
CN114425332A (en) * 2022-02-24 2022-05-03 河南科技大学 Preparation method and application of Au-Pd micro-flowers constructed by ultrathin nanosheets
CN114425332B (en) * 2022-02-24 2023-07-25 河南科技大学 Preparation method and application of Au-Pd micron flower constructed by ultrathin nanosheets

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