CN111111731A - Preparation method of graphene-loaded nitrogen-boron-doped nickel phosphide electrolyzed water catalyst - Google Patents

Preparation method of graphene-loaded nitrogen-boron-doped nickel phosphide electrolyzed water catalyst Download PDF

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CN111111731A
CN111111731A CN201911327124.XA CN201911327124A CN111111731A CN 111111731 A CN111111731 A CN 111111731A CN 201911327124 A CN201911327124 A CN 201911327124A CN 111111731 A CN111111731 A CN 111111731A
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graphene
preparation
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gas
water catalyst
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赵子涵
李文娟
薛娇
林翠萍
孙一强
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University of Jinan
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University of Jinan
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/33Electric or magnetic properties
    • 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
    • B01J27/24Nitrogen compounds
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00Electrolytic production of inorganic compounds or non-metals
    • C25B1/01Products
    • C25B1/02Hydrogen or oxygen
    • C25B1/04Hydrogen or oxygen by electrolysis of water
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051Electrodes formed of electrocatalysts on a substrate or carrier
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/055Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
    • C25B11/057Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of a single element or compound
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/073Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
    • C25B11/091Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
    • 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
    • Y02E60/36Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

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  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The invention relates to a preparation method of a graphene-loaded nitrogen-boron-doped nickel phosphide electrolyzed water catalyst, belonging to the technical field of preparation of novel inorganic nano functional materials. The method takes B-NiO/graphene nano-sheets as precursors to prepare N, B-Ni through annealing under the protection of gas2P/graphene composite catalysts. The method comprises the following specific steps: firstly, preparing B-NiO/graphene as a precursor by using nickel nitrate, graphene oxide and sodium borohydride as reactants through a gas-phase synthesis method; further using sodium hypophosphite to heat the precursor under the protection of gas for phosphorization to obtain N, B-Ni2P/graphene composite electrolytic water catalyst.

Description

Preparation method of graphene-loaded nitrogen-boron-doped nickel phosphide electrolyzed water catalyst
Technical Field
The invention relates to a preparation method of a graphene-loaded nitrogen-boron-doped nickel phosphide electrolyzed water catalyst, belonging to the technical field of novel inorganic nano functional materials.
Background
Hydrogen (H)2) Are considered as clean energy carriers to replace fossil fuels due to their high energy density and environmental friendliness. Currently, large-scale high-purity Hydrogen (HER) produced by cathodic hydrogen evolution reactions through water electrolysis is considered a cost-effective and viable process. So far, electrocatalysts with high catalytic hydrogen production catalytic efficiency have been limited to expensive and scarce noble metal catalysts (e.g., platinum), which severely hamper their practical application. For this reason, many non-noble metal-based electrocatalysts have been developed with high efficiency in acidic and alkaline electrolytes, including transition metal nitrides, sulfides, selenides, carbides, phosphides, and the like. However, most of the catalysts having excellent hydrogen evolution activity in acidic or basic media have unsatisfactory catalytic activity in neutral media due to their low conductivity, low intrinsic catalytic activity, and the like. In addition, in an acidic or alkaline medium, the strong acid and the strong base are easy to corrode an electrolysis instrument and a catalyst, so that the method is low in environmental and economic friendliness. In contrast, electrochemical water splitting in neutral media can effectively reduce the overall cost of an electrolyzed water system because expensive proton exchange membranes are not required. Therefore, the development of efficient and stable neutral HER electrocatalysts is an important basis and key link for the development of hydrogen production technology by water electrolysis, but still faces greater challenges.
So far, Transition Metal Phosphide (TMP), including Ni2P,Ni12P5,CoP,Co2P, NiCoP, FeP and MoP, etc. are widely used as substitutes for Pt-based catalysts due to their non-metallic characteristics, high electrocatalytic properties and significant soil abundance. However, the monotonic morphology, small specific surface area, and low conductivity and low stability severely limit their practical applications. In order to solve the above problems and further improve the electrochemical activity, several strategies to solve the above key problems have been proposed, and some progress has been made so far. For example, increasing the specific surface area of TMP nanostructures by surface roughening or porous structures can not only create more exposed active sites, but can also enhance water moleculesDiffusion and rapid release of gaseous products. Based on earlier stage research, the invention develops a preparation method of the full-pH electrolyzed water hydrogen evolution catalyst with low cost, simplicity, convenience, practicability and low energy consumption, and Ni is regulated and controlled by doping boron and nitrogen2P-electron structure, enhancement of Ni by graphene loading2P conductivity, successfully synthesizes the graphene loaded nitrogen boron doped nickel phosphide (N, B-Ni)2P/graphene) nanoplatelets and for stable HER catalysis. N, B-Ni obtained by synergistic regulation of water and hydrogen binding energy2P/graphene shows significant HER activity in acidic, basic and neutral electrolytes.
Disclosure of Invention
The invention develops the N, B-Ni full-pH electrolyzed water hydrogen evolution with low cost, simple and easy operation and low energy consumption2A preparation method of a P/graphene catalyst. The preparation method provided by the invention has the advantages of simple process and low cost, and the prepared N, B-Ni2The P/graphene water electrolysis catalyst has excellent performance, has good catalytic performance in acidic, alkaline and neutral environments, and has high practical application value.
The invention aims to realize the preparation method of the graphene-loaded nitrogen-boron-doped nickel phosphide electrolyzed water catalyst by adopting the following technical scheme, which comprises the following steps of:
1) weighing 1-3 mmol of Ni (NO)3)2 .6H2Dissolving O in water, preparing 1.5-3 mg/L graphene oxide aqueous solution, mixing and stirring in a beaker, stirring for a period of time, and adding 0.5 mol/L NaBH4Continuously stirring for a period of time and then centrifugally drying;
2) grinding the substance obtained in the step 1 into powder, placing the powder in a quartz boat, and adding N2Heating under the protection of (1) to obtain B-NiO/graphene;
3) grinding the B-NiO/graphene obtained in the step 2, and weighing 150-300 mg NaH2PO2Mixing B-NiO/graphene with weighed NaH2PO2Put together in a quartz boat and in NH3Heating under the protection of/Ar mixed gas to obtain N, B-Ni2P/graphene;
4) AsIn comparison, the B-NiO/graphene obtained in step 2 is ground and weighed as 150-300 mg NaH2PO2Mixing B-NiO/graphene with weighed NaH2PO2Are placed together in a quartz boat and are in N2Heating under the protection of (2) to obtain B-Ni2P/graphene。
The invention has the beneficial effects that:
(1) the invention provides N, B-Ni with excellent performance under full pH2The preparation method of the P/graphene electrolytic water catalyst comprises the steps of firstly preparing B-NiO/graphene through a simple gas phase synthesis method, and then continuing to prepare NH3Heating under the protection of/Ar mixed gas to obtain N, B-Ni2P/graphene. The preparation method is simple and easy to operate, does not need special equipment, has low cost, is suitable for large-scale preparation, and can meet the requirements of practical application;
(2) the product prepared by the invention is N, B-Ni2The product of the P/graphene nano-sheet has uniform shape and size, and the active component is loaded by graphene and is easy to use;
(3) n, B-Ni prepared by the invention2The P/graphene composite water electrolysis catalyst has excellent water electrolysis hydrogen production performance and good stability in a full pH environment;
(4) the preparation of the invention only needs common equipment in a laboratory, does not need special equipment, and has simple and easy technical process.
Drawings
FIG. 1 (a) is a Transmission Electron Microscope (TEM) photograph of B-NiO/graphene prepared in step 2 of the present invention taken after observation with a transmission electron microscope;
(b) is N, B-Ni prepared in step 32A Transmission Electron Microscope (TEM) photograph of the P/graphene taken after observation with a transmission electron microscope;
(c) B-Ni prepared in step 42A Transmission Electron Microscope (TEM) photograph of the P/graphene taken after observation with a transmission electron microscope.
FIG. 2 (a) is an X-ray diffraction (XRD) pattern of B-NiO/graphene prepared in step 2 of the present invention;
(b) is N, B-Ni prepared in step 32X-ray of P/grapheneDiffraction (XRD) pattern;
(c) B-Ni prepared for step 42X-ray diffraction (XRD) pattern of P/graphene.
FIG. 3 shows the final N, B-Ni produced by the present invention using energy dispersive spectrometer2And (4) carrying out element analysis on the P/graphene to obtain an energy spectrum.
FIG. 4 shows N, B-Ni2The P/graphene is used as a working electrode for water electrolysis hydrogen production reaction, and water electrolysis hydrogen production experiments are carried out under (a) acidic, (b) alkaline and (c) neutral environments, so that a polarization curve graph is obtained.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are not intended to limit the scope of the present invention.
Example 1
Firstly, nickel nitrate with the concentration of 0.01 mol per liter and graphene oxide aqueous solution with the concentration of 3 mg per milliliter are mixed and stirred for 30 minutes, and then NaBH with the concentration of 0.5 mol per liter is added4The solution was stirred for an additional 40 minutes and then dried by centrifugation. Grinding the obtained material into powder, placing the powder in a quartz boat, and placing the quartz boat in a reactor under N2Heating to 300 ℃ for 2 hours under the protection of gas to obtain B-NiO/graphene. 150mg of NaH is weighed2PO2Mixing the obtained B-NiO/graphene and the weighed NaH2PO2Put together in a quartz boat and in NH3Heating to 320 ℃ for 1 hour under the protection of/Ar mixed gas to obtain N, B-Ni2P/graphene, N, B-Ni after naturally cooling to room temperature2P/graphene composite electrolytic water catalyst.
Example 2
Firstly, nickel nitrate with the concentration of 0.02 mol/L and graphene oxide aqueous solution with the concentration of 6 mg/mL are mixed and stirred for 60 minutes, and then NaBH with the concentration of 0.5 mol/L is added4The solution was stirred for 60 minutes and then dried by centrifugation. Grinding the obtained material into powder, placing the powder in a quartz boat, and placing the quartz boat in a reactor under N2Heating to 350 ℃ for 2 hours under the protection of the above to obtain B-NiO/graphene. Weighing 300 mg of NaH2PO2Mixing the obtained B-NiO/graphene with the weighed B-NiO/grapheneNaH2PO2Are placed together in a quartz boat and are in N2Heating to 350 ℃ for 1 hour under the protection of (1) and naturally cooling to room temperature to obtain the B-Ni2P/graphene composite electrolytic water catalyst.
Example 3
Using Chenhua 760D electrochemical workstation to pair N, B-Ni2The activity and stability of hydrogen production by water electrolysis of the P/graphene composite water electrolysis catalyst are tested. Taking a platinum wire as a counter electrode, silver/silver chloride as a reference electrode, and N, B-Ni2P/graphene is a working electrode, 1.0 mol of KOH aqueous solution per liter and 0.5 mol of H per liter2SO4The electrolyte solution is aqueous solution, 1 mol/L PBS aqueous solution. And performing linear volt-ampere scanning at a scanning speed of 5 milliamperes per second within a voltage range of-0.8 to-1.5V to obtain a polarization curve of hydrogen production by catalytic electrolysis of water.

Claims (3)

1. A preparation method of a graphene-loaded nitrogen-boron-doped nickel phosphide electrolysis water catalyst is characterized by comprising the following steps:
1) preparing B-NiO/graphene as a precursor by a gas-phase synthesis method by taking nickel nitrate, graphene oxide and sodium borohydride as reactants;
2) drying the B-NiO/graphene obtained in the step 1, and weighing a certain amount of NaH2PO2Mixing B-NiO/graphene with weighed NaH2PO2Put together in a quartz boat and in NH3Heating under the protection of/Ar mixed gas to obtain N, B-Ni2P/graphene。
2. N, B-Ni as claimed in claim 12The preparation method of the P/graphene composite electrolytic water catalyst is characterized in that the preparation of the precursor of the composite catalyst is carried out by a gas phase synthesis method.
3. N, B-Ni as claimed in claim 12The preparation method of the P/graphene composite electrolytic water catalyst is characterized in that the products are all synthesized by precursors under the condition of gas protection and no solution.
CN201911327124.XA 2019-12-20 2019-12-20 Preparation method of graphene-loaded nitrogen-boron-doped nickel phosphide electrolyzed water catalyst Pending CN111111731A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113289650A (en) * 2021-06-08 2021-08-24 华东师范大学 Bimetallic phosphide-carbon electrocatalytic hydrogen evolution material and preparation method thereof
CN114921809A (en) * 2022-04-24 2022-08-19 北京科技大学 Preparation method of foamed nickel loaded boron-doped phosphide heterojunction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103611555A (en) * 2013-11-20 2014-03-05 东华大学 Nitrogen-doped graphene catalyst and preparation method and application thereof
CN104437572A (en) * 2014-10-31 2015-03-25 常州大学 Preparation method of graphene-loaded nano nickel phosphate hydrogenation catalyst
CN106238060A (en) * 2016-09-29 2016-12-21 山东欧铂新材料有限公司 A kind of preparation method of graphene/nickel composite
CN108620106A (en) * 2018-05-21 2018-10-09 燕山大学 A kind of preparation method of nickel phosphide/boron-doping reduction-oxidation graphite liberation of hydrogen composite material
CN109759066A (en) * 2019-01-29 2019-05-17 济南大学 A kind of preparation method for the cobalt nickel bimetal oxide oxygen-separating catalyst that boron doping is graphene-supported

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103611555A (en) * 2013-11-20 2014-03-05 东华大学 Nitrogen-doped graphene catalyst and preparation method and application thereof
CN104437572A (en) * 2014-10-31 2015-03-25 常州大学 Preparation method of graphene-loaded nano nickel phosphate hydrogenation catalyst
CN106238060A (en) * 2016-09-29 2016-12-21 山东欧铂新材料有限公司 A kind of preparation method of graphene/nickel composite
CN108620106A (en) * 2018-05-21 2018-10-09 燕山大学 A kind of preparation method of nickel phosphide/boron-doping reduction-oxidation graphite liberation of hydrogen composite material
CN109759066A (en) * 2019-01-29 2019-05-17 济南大学 A kind of preparation method for the cobalt nickel bimetal oxide oxygen-separating catalyst that boron doping is graphene-supported

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113289650A (en) * 2021-06-08 2021-08-24 华东师范大学 Bimetallic phosphide-carbon electrocatalytic hydrogen evolution material and preparation method thereof
CN113289650B (en) * 2021-06-08 2023-02-03 华东师范大学 Bimetallic phosphide-carbon electrocatalytic hydrogen evolution material and preparation method thereof
CN114921809A (en) * 2022-04-24 2022-08-19 北京科技大学 Preparation method of foamed nickel loaded boron-doped phosphide heterojunction

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