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FeS-coated SW/NF electrocatalyst and preparation method and application thereof

An electrocatalyst and electrode technology, applied in the field of FeS@SW/NF electrocatalyst and its preparation, to achieve excellent catalytic activity and stability, mild and controllable reaction, and green and efficient synthesis

Pending Publication Date: 2022-07-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, common chemical synthesis methods use more chemical reagents and require careful treatment of complex precursors under strict synthesis conditions.
There are still major limitations in the synthesis method

Method used

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  • FeS-coated SW/NF electrocatalyst and preparation method and application thereof
  • FeS-coated SW/NF electrocatalyst and preparation method and application thereof
  • FeS-coated SW/NF electrocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Inoculate Shewanella (Shewanella oneidensis MR-1, purchased from ATCC American Type Culture Collection, strain number ATCC700550) into LB medium for culture, and inoculate Shewanella oneidensis The volume ratio of the inoculum into the LB medium and the volume of the LB medium was 0.75:100; placed in a shaker at a temperature of 30 °C and cultured at 180 rpm for 12 h to obtain mature bacterial liquid, and the concentration of mature bacterial liquid OD600 value was 0.5 ~4, the surface of the bacteria is basically smooth without obvious particles.

[0029] (2) LB liquid medium (tryptone 10 g / L, yeast extract 5 g / L, sodium chloride 5 g / L) and M9 medium (Na 2 HPO 4 ·12H 2 O 17.8 g / L, KH 2 PO 4 3 g / L, NaCl 0.5 g / L, NH 4 Cl 10.5 g / L) and mix thoroughly according to the volume ratio of 5:95 to obtain a mixed solution, add sodium lactate solution to make the final concentration 18 mM, add CaCl 2 solution to a final concentration of 0.1 mM, add MgSO 4 The solution w...

Embodiment 2

[0039] FeS@SW-SW was prepared by basically the same method as Example 1 0.1 / NF electrode, the difference is that the final concentration of Shewanella in step (4) of this example is controlled at OD 600 is 0.1. Tested, 50 mA / cm 2 The overpotential is 332 mV at the current density of .

Embodiment 3

[0041] FeS@SW-Fe was prepared by basically the same method as Example 1 0.01 / NF electrode, the difference is that the final concentration of ferric chloride added in step (4) of this example is 0.01 mM; after testing, 50 mA / cm 2 The overpotential under the current density is 298mV.

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Abstract

The invention belongs to the technical field of composite material preparation, and particularly relates to a FeS-coated SW / NF electrocatalyst and a preparation method and application thereof. The effective oxygen evolution reaction electrocatalyst is successfully synthesized by utilizing the biological reducibility of a biological resource wild shewanella which massively exists in the nature, and green and efficient synthesis of the electrocatalyst is realized. In the synthesized electrocatalyst, FeS particles are uniformly distributed on the foamed nickel substrate, more reaction active sites are generated, effective catalytic activity is generated for oxygen evolution half reaction of water decomposition, and the prepared FeS-coated SW / NF electrode has excellent catalytic activity and stability. Compared with a chemical synthesis method, the use amount of harmful chemicals is greatly reduced, the whole synthesis process is dominated by bacteria and is carried out at normal temperature and normal pressure, and the reaction is mild, controllable, green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and particularly relates to a FeS@SW / NF electrocatalyst and a preparation method and application thereof. Background technique [0002] In the process of electrolysis of water to produce hydrogen, the oxidation reaction occurs on the anode side to generate oxygen, and the reduction reaction occurs on the cathode side to generate hydrogen. However, the hydrogen evolution reaction of the cathode is a two-electron transfer process, and the oxygen evolution reaction of the anode is a four-electron transfer process. The mechanism of the entire oxygen evolution reaction is more complicated, the chemical reaction kinetics of the reaction are slow, and the reaction is difficult. To a certain extent, it limits the efficiency of electrolysis of water to produce hydrogen. Therefore, the development of effective oxygen evolution reaction catalysts to reduce the potential of oxygen evol...

Claims

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Application Information

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IPC IPC(8): C25B11/031C25B11/061C25B11/091C25B1/04
CPCC25B11/031C25B11/061C25B11/091C25B1/04Y02E60/36
Inventor 沈芊岑糜建立雍阳春
Owner JIANGSU UNIV
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