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A non-noble metal doped molybdenum carbide hydrogen evolution electrode and its preparation method and application

A non-precious metal, hydrogen evolution electrode technology, applied in the direction of electrodes, electrolysis components, electrolysis process, etc., can solve the problem of low hydrogen evolution reaction rate, achieve the effect of improving hydrogen evolution performance, avoiding slow electron transfer rate, and improving the efficiency of acetic acid production

Active Publication Date: 2020-07-14
NANJING TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: In order to solve the problem of low hydrogen evolution reaction rate of the existing molybdenum carbide hydrogen evolution electrode, the first aspect of the present invention provides a non-noble metal doped molybdenum carbide hydrogen evolution electrode, and the second aspect provides a non-noble metal doped molybdenum carbide hydrogen evolution electrode. Preparation, the third aspect provides the application of non-noble metal doped molybdenum carbide hydrogen evolution electrode

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  • A non-noble metal doped molybdenum carbide hydrogen evolution electrode and its preparation method and application

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Embodiment 1

[0024] Dissolve 2 mol of ammonium molybdate, ferric chloride, and cobalt chloride in 250 mL of water at a molar ratio of 24:3:1, add 10 mL of benzylamine, and mix for 2 hours. Then the pH was adjusted to 5 with 1M HCl, stirred at 60° C. for 4 h to obtain a mixed solution. The solution was then filtered, washed with ethanol, and dried overnight at 60°C. The dried samples were placed in a tube furnace and reacted at 700 °C for 8 h under the protection of argon. The calcined sample was washed with 1M HCl, then deionized water, and dried to obtain a non-precious metal-doped molybdenum carbide catalyst. Then the catalyst was dissolved with a mixture of 3% Nafion solution with volume ratio of 3:10 and ethanol water solution with volume concentration of 95%. Carbon felt was pre-used with 1mol L -1 Soak in hydrochloric acid for 6 hours, wash to neutral drying, and then use 1mol L -1 Soak in sodium hydroxide aqueous solution for 6 hours, wash until neutral and dry, then add the pre...

Embodiment 2

[0029] Dissolve 1mol of ammonium molybdate, ferric chloride, and cobalt chloride in 250mL of water at a molar ratio of 10:1:1, add 10mL of benzylamine, and mix for 4h. Then the pH was adjusted to 5 with 1M HCl, stirred at 60° C. for 4 h to obtain a mixed solution. The solution was then filtered, washed with ethanol, and dried overnight at 60°C. The dried samples were placed in a tube furnace and reacted at 800°C for 10 h under the protection of argon. The calcined sample was washed with 1M HCl, then deionized water, and dried to obtain a non-precious metal-doped molybdenum carbide catalyst. The catalyst was then dissolved with a mixture of 5% Nafion solution and 95% ethanol aqueous solution with a volume ratio of 1:10. Carbon felt was pre-used with 1mol L -1 Soak in hydrochloric acid for 6 hours, wash to neutral drying, and then use 1mol L -1 soaked in sodium hydroxide for 6 hours, washed until neutral and dried, then added the pretreated carbon felt to the catalyst soluti...

Embodiment 3

[0032] Dissolve 5 mol of ammonium molybdate, ferric chloride, and cobalt chloride in 250 mL of water at a molar ratio of 30:2:1, add 10 mL of benzylamine, and mix for 3 hours. Then the pH was adjusted to 6 with 1M HCl, stirred at 80° C. for 3 h to obtain a mixed solution. The solution was then filtered, washed with ethanol, and dried overnight at 60°C. The dried samples were placed in a tube furnace and reacted at 900°C for 6 h under the protection of argon. The calcined sample was washed with 1M HCl, then deionized water, and dried to obtain a non-precious metal-doped molybdenum carbide catalyst. Then dissolve the catalyst with a mixture of 1% Nafion solution and 95% ethanol solution with a volume ratio of 3:10. Carbon felt was pre-used with 1mol L -1 Soak in hydrochloric acid for 6 hours, wash to neutral drying, and then use 1mol L -1 Soak in sodium hydroxide aqueous solution for 6 hours, wash until neutral and dry, then add the pretreated carbon felt to the catalyst sol...

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Abstract

The invention discloses a method for preparing a non-noble metal-doped molybdenum carbide hydrogen evolution electrode. The steps are as follows: (1) dissolving ammonium molybdate and non-noble metal salt in water, adding benzylamine and stirring; (2) adjusting step (1) to obtain pH of the system to 4-6, stirred at 40-80°C for 3-6h, filtered, cleaned and dried the obtained precipitate; (3) in an inert gas atmosphere, calcined the dried sample, washed, drying to obtain a non-noble metal-doped molybdenum carbide catalyst; (4) preparing a non-noble metal-doped molybdenum carbide catalyst into a catalyst solution, immersing the pretreated electrode in the catalyst solution, stirring, and drying to obtain a hydrogen evolution electrode. Under the non-precious metal-doped molybdenum carbide hydrogen evolution electrode, autotrophic microorganisms can obtain electrons indirectly from hydrogen more effectively, avoiding the disadvantage of slow electron transfer rate in biofilms, thereby achieving the goal of improving the acetogenic efficiency of carbon dioxide reduction in bioelectric synthesis systems Purpose.

Description

technical field [0001] The invention relates to a hydrogen evolution electrode in microbial electrosynthesis technology and its preparation method and application, in particular to a non-noble metal-doped molybdenum carbide hydrogen evolution electrode and its preparation method and application. Background technique [0002] Microbial Electrosynthesis (MES) is an emerging interdisciplinary technology strategy that integrates key technologies in many related fields such as environmental science, microbiology, electrochemistry, materials science, and analytical chemistry. In 2010, Professor RABAEY systematically elaborated on MES technology in the journal Nature. In the same year, the Lovley research group of the University of Massachusetts performed CO by supplying electricity to Sporomusa ovata grown on the electrode surface 2 The study of reductive synthesis of chemicals such as acetic acid demonstrated for the first time the realization of CO by donating electrons to elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/04C25B11/06C25B3/25
CPCC25B3/25C25B11/051C25B11/091
Inventor 宋天顺谢婧婧
Owner NANJING TECH UNIV
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