Ruthenium-phosphorous co-modified compound catalyst and preparation method thereof

A composite catalyst and co-modification technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem that the hydrogen evolution activity cannot be compared with that of Pt noble metal catalysts, and achieve large industrial application prospects. Production cost reduction, low cost effect

Active Publication Date: 2019-02-22
CHONGQING TECH & BUSINESS UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrogen evolution activity of phosphide catalysts is still not comparable to that of Pt noble metal catalysts.

Method used

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  • Ruthenium-phosphorous co-modified compound catalyst and preparation method thereof
  • Ruthenium-phosphorous co-modified compound catalyst and preparation method thereof
  • Ruthenium-phosphorous co-modified compound catalyst and preparation method thereof

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Embodiment 1

[0035] A ruthenium-phosphorus co-modified nickel composite catalyst includes ruthenium element and nickel phosphide, and the ruthenium element is embedded in the nickel phosphide through an electrochemical method.

[0036] A preparation method of a ruthenium-phosphorus co-modified nickel composite catalyst specifically includes the following steps:

[0037] (1) Put the cleaned foamed nickel into a reactor containing 15% hydrogen peroxide by mass, with an oxidation temperature of 150°C and an oxidation time of 16h, and obtain nickel oxide foamed nickel by hydrothermal oxidation and etching;

[0038] (2) Using the foamed nickel with rough surface and nickel oxide obtained in step (1) as the cathode and carbon rod as the anode, prepare 50mmol / L sodium citrate, 10mmol / L hydrochloric acid, 50mmol / L ammonium sulfate, 10mmol / L A mixed solution of ruthenium trichloride and 100mmol / L sodium hypophosphite was used as an electrolyte, reacted for 2h under a constant potential condition of -1.2V,...

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Abstract

The invention belongs to the technical field of electrolytic hydrogen production and particularly discloses a ruthenium-phosphorous co-modified compound catalyst. The ruthenium-phosphorous co-modifiedcompound catalyst comprises elemental ruthenium and nickel phosphide, wherein the elemental ruthenium is embedded into the nickel phosphide. The invention also discloses a preparation method of the ruthenium-phosphorous co-modified compound catalyst. The preparation method of the ruthenium-phosphorous co-modified compound catalyst comprises the following steps of (1) oxidizing foamed nickel to prepare rough-surfaced and nickel oxide-containing foamed nickel; (2) taking the nickel-containing foamed nickel as the anode, a carbon rod as the cathode, and a mixed solution of pH electrolyte regulator, ruthenium sources and phosphorous sources as electrolyte solution for polarization through the same potential cathode to obtain the ruthenium-phosphorous co-modified compound catalyst. The prepared ruthenium-phosphorous co-modified compound catalyst is comparable in hydrogen evolution activity with Pt catalysts.

Description

Technical field [0001] The application of the present invention belongs to the technical field of hydrogen production by electrolysis, and specifically discloses a ruthenium-phosphorus co-modified nickel composite catalyst and a preparation method thereof. Background technique [0002] Faced with the continuous reduction of global fossil energy and the environmental problems caused by corresponding pollutants, hydrogen energy as a renewable secondary clean energy has received extensive attention from scientific researchers around the world. [0003] The most effective catalyst for electrolytic hydrogen is Pt-based precious metals, but Pt-based precious metals are expensive and scarce in resources, so they cannot be applied on a large scale. Therefore, researchers have changed the chemistry of non-precious metal catalysts through alloying, surface modification, and hybridization. Composition and electronic structure, designed and synthesized a series of non-precious metal catalysts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J35/08C25B1/04C25B11/08
CPCB01J27/1856B01J35/08C25B1/04C25B11/04Y02E60/36
Inventor 熊昆黄丽萍龙川张海东陈佳沈慧珍卓越
Owner CHONGQING TECH & BUSINESS UNIV
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