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Transition metal phosphide composite material for oxygen evolution of acidic electrolysis water and preparation method thereof

A technology for acid electrolysis of water and transition metals, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of high price, low activity and poor stability of acid electrolysis water oxygen evolution catalyst, and achieve excellent electrolysis water oxygen evolution catalytic activity. , easy to combine, cost reduction effect

Pending Publication Date: 2021-12-28
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention solves the current problems of high price, low activity and poor stability of acidic electrolytic water oxygen evolution catalyst; and provides a non-precious metal supported transition metal phosphide composite material and its preparation method

Method used

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  • Transition metal phosphide composite material for oxygen evolution of acidic electrolysis water and preparation method thereof
  • Transition metal phosphide composite material for oxygen evolution of acidic electrolysis water and preparation method thereof
  • Transition metal phosphide composite material for oxygen evolution of acidic electrolysis water and preparation method thereof

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Embodiment 1

[0032] Embodiment 1: The preparation method of the transition metal phosphide complex in this embodiment is realized according to the following steps:

[0033] Step 1: Cut the carbon cloth into a small cube with a size of 3cm×3cm, and then place it in a mixed solution of concentrated hydrochloric acid with a mass fraction of 36% and concentrated sulfuric acid with a mass fraction of 98.3% for ultrasonic cleaning for 30 minutes, and then let the acid stand Treat for 4 hours, then wash with distilled water again, place in an oven and dry at 60°C for 4 hours to obtain a pretreated carbon cloth; the volume ratio of concentrated hydrochloric acid and concentrated sulfuric acid in the mixed solution is 1:3.

[0034] Step 2, dissolving 0.3g of cobalt nitrate and 0.2g of phosphomolybdic acid in 25mL of distilled water, stirring evenly, the color of the solution turns brown, forming a cobalt-molybdenum polyacid cluster intermediate;

[0035] Step 3, transfer the reaction solution obtai...

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Abstract

The invention discloses a preparation method of a transition metal phosphide composite material for oxygen evolution of acidic electrolysis water, belongs to the technical field of non-noble metal oxygen evolution catalysts, and aims to solve the problems of high price, low activity, poor stability and the like of the current acidic electrolysis water oxygen evolution catalyst. The composite material provided by the invention is composed of nanosheets composed of carbon cloth and cobalt-molybdenum bimetallic phosphide. The method comprises the following steps: 1, carrying out pickling pretreatment on carbon cloth; 2, dissolving cobalt nitrate and phosphomolybdic acid in distilled water, and uniformly stirring until the color of the solution becomes brown to obtain a cobalt molybdenum polyacid cluster intermediate; 3, transferring into a hydrothermal kettle, and forming a cobalt-molybdenum bimetal oxide / carbon cloth complex after the solution is subjected to hydrothermal treatment and becomes purple; and 4, carrying out high-temperature phosphorization, cooling, and washing. According to the invention, the cobalt molybdenum phosphide / carbon cloth material has the characteristics of high conductivity, large electrochemical surface area, high chemical stability, acid resistance and corrosion resistance, and shows excellent acid electrolysis water oxygen evolution activity.

Description

technical field [0001] The invention belongs to the technical field of non-noble metal oxygen evolution catalysts; in particular, it relates to a transition metal phosphide composite material for oxygen evolution in acid electrolysis water and a preparation method thereof. Background technique [0002] Hydrogen energy is a new type of green energy, which has the advantages of environmental protection, high efficiency, and sustainability. Electrochemical catalytic water splitting for hydrogen production is currently one of the cleanest, simplest and most efficient methods. The process of splitting water involves two important reactions, the oxygen evolution reaction at the anode and the hydrogen evolution reaction at the cathode. Compared with alkaline water splitting for hydrogen production, a proton exchange membrane water electrolysis (PEM) device operating in an acidic medium has a current High density, low operating temperature, low gas permeability and simple electrol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B11/065C25B1/04
CPCC25B11/091C25B11/065C25B1/04Y02E60/36
Inventor 闫海静付宏刚王雨焦艳淸
Owner HEILONGJIANG UNIV
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