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A COP/CO with high HER and OER catalytic activity 2 The preparation method of p composite catalyst

A composite catalyst and a technology of catalytic activity, applied in the field of electrocatalysis, can solve the problems of unsatisfactory catalytic activity of transition metal phosphide electrocatalysts, etc., and achieve the effects of high electrochemical stability and ignition point, low cost, and improved safety.

Active Publication Date: 2022-05-27
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing transition metal phosphide preparation methods and the unsatisfactory catalytic activity of the prepared transition metal phosphide electrocatalyst, and develop a simple preparation process, no pollution to the environment, low cost, CoP / Co with high catalytic activity for HER and OER can be prepared on a large scale 2 P Composite Catalyst Method

Method used

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  • A COP/CO with high HER and OER catalytic activity <sub>2</sub> The preparation method of p composite catalyst
  • A COP/CO with high HER and OER catalytic activity <sub>2</sub> The preparation method of p composite catalyst
  • A COP/CO with high HER and OER catalytic activity <sub>2</sub> The preparation method of p composite catalyst

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Effect test

Embodiment 1

[0023] Weigh 2.5g of cobalt trioxide powder and 1.0g of self-made black phosphorus into a high-energy ball mill jar, add 72g of stainless steel balls, and seal. Set the low temperature to 25°C, the high temperature to 45°C, the rotation speed to 1200r / min, and ball mill for 2 hours to obtain 3.23g CoP / Co 2 P composite electrocatalyst.

[0024] Take 10mg of the resulting CoP / Co 2 The P composite electrocatalyst was placed in the sample tube, followed by adding 450 μL of isopropanol and 50 μL of naphthol solution, and ultrasonicated for 1 h to prepare a suspension. The suspension was drop-coated on a rotating disk electrode (platinum carbon), with Ag / AgCl as the reference electrode and platinum wire as the counter electrode, and its electrocatalytic HER was measured. The suspension was drop-coated on graphite sheets, one as the cathode and the other as the anode, and its catalytic performance for total water splitting was measured.

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Abstract

The invention discloses a preparation method of a CoP / Co2P composite catalyst with high HER and OER catalytic activity. Add commercially available cobalt trioxide and self-made nano black phosphorus into the high-energy ball mill tank at a molar ratio of 1:1 to 1:3, the mass ratio of raw materials to balls is 1:20‑25, seal it, and keep The CoP / Co 2 P composite catalyst. This method requires only one-step high-energy ball milling to rapidly prepare CoP / Co 2 The P composite catalyst does not emit any pollutants during the preparation process and can be mass-produced at low cost. Its electrocatalytic HER overpotential is as low as 69mV, and its electrocatalytic OER overpotential is as low as 266mV.

Description

[0001] The invention relates to the field of electrocatalysis, specifically a CoP / Co 2 The preparation method of P composite catalyst. Background technique [0002] In the face of today's increasing global energy consumption, the depletion of traditional energy sources such as fossil fuels and their negative impact on the environment have inspired people's sense of urgency to explore renewable energy storage and production technologies. With the continuous development of fuel cells, hydrogen energy becomes a potential choice because it has the highest known mass energy density (32.67kWhkg -1 ), which can be produced in an environmentally friendly manner by electrochemical water splitting, the key to realizing this process is the selection of highly efficient catalysts. Pt / C and RuO 2 It is currently recognized as a highly efficient hydrogen evolution and oxygen evolution catalyst, however. The scarcity and high cost of precious metals Pt and Ru severely limit their commerci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185C25B1/04C25B11/091
CPCB01J27/1853B01J37/0036C25B1/04C25B11/091B01J35/33Y02E60/36
Inventor 李镇江薛鸿垚高成海张海钦孟阿兰
Owner QINGDAO UNIV OF SCI & TECH
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