Cobalt-molybdenum alloy and cobalt-molybdenum mixed oxide electrocatalyst and preparation method and application thereof

An oxide electrocatalyst technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems that electrocatalysts are rarely reported, and the mechanism of electrocatalyst performance regulation needs to be further studied, so as to enhance the charge transfer efficiency and improve electron transport Efficiency and easy operation

Active Publication Date: 2021-11-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, despite these advances, the reported metal / metal (hydr)oxides are limited to nickel or molybdenum-based (hydr)oxides, while those composed of Co and Mo elements exhibit excellent electrical conductivity and optimal reactant adsorption. Other metal / metal(hydr)oxide electrocatalysts for energy are rarely reported
At the same time, there are very few reports on the dual-functional electrocatalysts of CoMo-based alloys and metal (hydr)oxides used for both HER and OER, and the performance regulation mechanism of electrocatalysts needs to be further studied.

Method used

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  • Cobalt-molybdenum alloy and cobalt-molybdenum mixed oxide electrocatalyst and preparation method and application thereof
  • Cobalt-molybdenum alloy and cobalt-molybdenum mixed oxide electrocatalyst and preparation method and application thereof
  • Cobalt-molybdenum alloy and cobalt-molybdenum mixed oxide electrocatalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Cobalt-molybdenum alloy and cobalt-molybdenum mixed oxide electrocatalyst (Co 3 Mo / CoMoO x -550) preparation:

[0033] The nickel foam was ultrasonically cleaned with 3M hydrochloric acid, acetone, absolute ethanol and deionized water in sequence for 30 min, and then dried at 60°C.

[0034] Weigh 0.291g Co(NO 3 ) 2 ·6H 2 O and 0.241 g Na 2 MoO 4 2H 2 O, add 35mL of deionized water, stir for 30 minutes to obtain a precursor solution, put (2cm×5cm) nickel foam into the precursor solution, transfer it to a 50mL reactor, and heat it at 180°C for 12h until the reaction is complete After that, the color of the foamed nickel turns into lavender, take out the foamed nickel, wash with water and alcohol, dry at 60°C for 12h, and then put it into a tube furnace and anneal at 300°C for 1h under air condition to obtain CoMoO 4 .

[0035] CoMoO prepared above 4 Placed in the crucible, the crucible was transferred to the temperature-raising tube furnace with automatic progra...

Embodiment 2

[0037] Cobalt-molybdenum alloy and cobalt-molybdenum mixed oxide electrocatalyst (Co 3 Mo / CoMoO x -450) preparation:

[0038] The preparation method of this electrocatalytic material is basically the same as that of Example 1, the difference is: in H 2 / Ar atmosphere calcination temperature 450 ℃ calcination 2h.

Embodiment 3

[0040] Cobalt-molybdenum alloy and cobalt-molybdenum mixed oxide electrocatalyst (Co 3 Mo / CoMoO x -650) preparation:

[0041] The preparation method of this electrocatalytic material is basically the same as that of Example 1, the difference is: in H 2 / Ar atmosphere calcination temperature 650 ℃ calcination 2h.

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Abstract

The invention belongs to the field of nano materials, and discloses a cobalt-molybdenum alloy and cobalt-molybdenum mixed oxide electrocatalyst and a preparation method and application thereof. The preparation method comprises the following steps: synthesizing a cobalt molybdate precursor through a simple hydrothermal reaction, and further calcining the cobalt molybdate precursor in an H2/Ar atmosphere to obtain the Co3Mo/CoMoOx nanosheet array electrocatalyst. The series of cobalt-molybdenum alloy and cobalt-molybdenum mixed oxide has lower charge transfer resistance and reaction potential barrier of hydrogen evolution and oxygen evolution reaction, and has excellent performance in electro-catalytic hydrogen evolution and oxygen evolution reaction. Meanwhile, the catalyst is low in cost, simple and convenient to operate, simple in process and excellent in catalytic performance, and provides basic application research for the materials in the field of electro-catalysis.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to the field of electrocatalyst and its preparation. More specifically, it relates to a preparation method and application of an alloy and mixed oxide electrocatalyst for electrochemically decomposing water to produce hydrogen and oxygen. [0002] technical background [0003] Due to the depletion of fossil energy sources and serious environmental problems, the demand for sustainable and clean energy has been increasing. Hydrogen is considered as a promising renewable energy source due to its high energy density and environmental friendliness. Electrochemical water splitting is considered to be an efficient and clean hydrogen production technology because of its high product purity, high efficiency, and strong sustainability. Currently, Pt-based materials and Ir- or Ru-based oxides are considered as state-of-the-art electrocatalysts for HER and OER, respectively, but their high pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/031C25B11/061C25B11/091C25B1/04
CPCC25B11/031C25B11/061C25B11/091C25B1/04Y02E60/36
Inventor 刘雨姜德立李娣
Owner JIANGSU UNIV
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