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Monatomic platinum doped nano porous metal compound catalyst and preparation method and application thereof

A metal compound and nanoporous technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as agglomeration and deactivation, and achieve low cost, simple and controllable preparation process, and environmental friendliness Effect

Inactive Publication Date: 2019-07-05
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal atoms in single-atom catalysts exist in isolation, and are prone to agglomeration and deactivation in the process of preparation and practical application

Method used

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  • Monatomic platinum doped nano porous metal compound catalyst and preparation method and application thereof
  • Monatomic platinum doped nano porous metal compound catalyst and preparation method and application thereof
  • Monatomic platinum doped nano porous metal compound catalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A certain proportion of pure cobalt grains and cobalt selenide (CoSe) was arc-melted in an argon atmosphere to prepare an alloy ingot (Co:Se=85:15), and then the alloy ingot was remelted and thrown to obtain a uniform nanocrystalline two-phase structure. alloy strips. Finally, the alloy strips were electrochemically etched using a sulfuric acid aqueous solution through the three-electrode system of the electrochemical workstation, and etched at a corrosion voltage of 0.00V vs. Ag / AgCl for 2000s to obtain nanoporous cobalt selenide strips.

[0030] Single-atom doping of nanoporous cobalt selenide by cyclic potential method using an electrochemical workstation. In the three-electrode system, the calibrated Ag / AgCl electrode was used as the reference electrode, the platinum sheet was used as the counter electrode, and the nanoporous cobalt selenide strip was used as the working electrode. 2 SO 4 as an electrolyte. When doping, the potential cycle range of the working el...

example 2

[0035] A certain proportion of pure cobalt grains and cobalt phosphide (CoP) was arc-melted in an argon atmosphere to prepare an alloy ingot (Co:P=85:15), and then the alloy ingot was remelted and thrown to obtain a homogeneous nanocrystalline two-phase structure. alloy strip. Finally, the alloy strips were electrochemically etched using sulfuric acid aqueous solution through the three-electrode system of the electrochemical workstation, and etched for 5000s at a corrosion voltage of 0.05V vs. Ag / AgCl to obtain nanoporous cobalt phosphide strips.

[0036] Using the same doped three-electrode system as in Example 1, using nanoporous cobalt phosphide as a working electrode, setting the same parameters as in Example 1 to perform single-atom platinum doping on nanoporous cobalt phosphide. Different cycle times can obtain single-atom platinum-doped nanoporous cobalt phosphide catalysts with different platinum loadings, among which the single-atom platinum-doped nanoporous cobalt ph...

Embodiment 3

[0040] Arc melting a certain proportion of pure cobalt grains and cobalt sulfide (CoS) in an argon atmosphere to prepare an alloy ingot (Co:S=90:10), and then remelting the alloy ingot to obtain an alloy with a uniform nanocrystalline two-phase structure Bands. Finally, the alloy strips were electrochemically etched using sulfuric acid aqueous solution through the three-electrode system of the electrochemical workstation, and etched at a corrosion voltage of 0.00V vs. Ag / AgCl for 1000s to obtain nanoporous cobalt sulfide strips.

[0041] Using the same doped three-electrode system as in Example 1, nanoporous cobalt sulfide was used as a working electrode, and the same parameters as in Example 1 were set to perform single-atom platinum doping on nanoporous cobalt sulfide. Different cycle times can obtain single-atom platinum-doped nanoporous cobalt sulfide catalysts with different platinum loadings, and the single-atom platinum-doped nanoporous cobalt sulfide catalysts prepared...

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Abstract

The inventi relates to a monatomic platinum doped nano porous metal compound catalyst and a preparation method and application thereof. According to the micro-dissolution phenomena of platinum counterelectrodes under long-term hydrogen evolution conditions, a cyclic potential method is used for doping monatomic platinum into a nanoporous metal compound to obtain the monatomic platinum doped nanoporous metal compound catalyst. The monatomic platinum doped nano porous metal compound catalyst has the electrocatalytic hydrogen evolution performance comparable to or even surpassing that of a commercial Pt / C catalyst at full pH. The preparation process is simple and controllable, the cost is low, the catalyst is environmentally friendly, large-scale and industrialized product can be achieved,and it shows that the catalyst has a broad application prospect.

Description

technical field [0001] The invention relates to a single-atom platinum-doped nanoporous metal compound, a preparation method and application thereof, and belongs to the preparation technology of single-atom catalysts. Background technique [0002] With the rapid development of the economy, the burning of fossil fuels has caused great pollution to the environment. The use of clean and safe hydrogen energy to replace fossil energy is an important development direction in the energy field. Hydrogen evolution in electrolyzed water is the key to the hydrogen energy cycle. At present, an important problem in electrolyzed water is the high energy consumption caused by the high hydrogen evolution overpotential. Platinum-series noble metal catalysts are the best catalysts for electrocatalytic hydrogen evolution, but their resources are scarce and expensive. The cost of non-noble metal catalysts is low, but the electrocatalytic hydrogen evolution performance is not as good as that o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/045B01J27/057B01J27/185B01J35/00B01J35/10B01J37/34C25B1/02C25B11/06
CPCB01J27/0573B01J27/1856B01J27/045B01J37/342C25B1/02C25B11/04B01J35/391B01J35/33B01J35/60
Inventor 谭勇文蒋康彭鸣
Owner HUNAN UNIV
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