Amorphous Manganese–Cobalt Nanosheets as Efficient Catalysts for Hydrogen Evolution Reaction (HER)

IF 2.1 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Surveys from Asia Pub Date : 2021-08-18 DOI:10.1007/s10563-021-09342-8

Ding Cao, Yingying Dong, Ying Tang, Yaoyao Ye, Shui Hu, Zhenguo Guo, Xinhua Li

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引用次数: 7

Abstract

A facile and efficient electrocatalyst for hydrogen evolution reaction (HER) to produce hydrogen is very important for future energy. In this paper, amorphous manganese–cobalt nanosheets are successfully prepared by electrospinning on a foamed nickel substrate. It is found that the manganese (Mn) introduction in manganese–cobalt composites can simultaneously enhance their electrocatalytic performances. As a result, benefitting from the 3D structure, the self-supported Mn–Co hydroxides exhibits unprecedented HER activity with a relatively low overpotential of 100 mV at 10 mA cm⁻² and has a possibility for the large-scale production of hydrogen.

Graphic Abstract

Amorphous PVP/Mn₄Co nanofibers formed by electrospinning on Ni foam (NF) has remarkable catalytic activity and stability for HER after operation for 6 h in 1 M KOH, with a low overpotential of 0.1 V at 100 mA cm⁻², a low Tafel slope of 65.4 mV dec⁻¹.

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无定形锰钴纳米片作为析氢反应的高效催化剂

一种简便、高效的析氢反应制氢电催化剂对未来能源发展具有重要意义。本文采用静电纺丝法在泡沫镍衬底上成功制备了非晶锰钴纳米片。在锰钴复合材料中引入锰(Mn)可以同时提高其电催化性能。因此，得益于三维结构，自支撑的Mn-Co氢氧化物表现出前所未有的HER活性，在10 mA cm - 2下的过电位相对较低，为100 mV，具有大规模生产氢气的可能性。在1 M KOH条件下，静电纺丝制备的无定形PVP/Mn4Co纳米纤维在100 mA cm−2下的过电位低至0.1 V, Tafel斜率低至65.4 mV dec−1，具有良好的HER催化活性和稳定性。

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来源期刊

Catalysis Surveys from Asia 化学-物理化学

CiteScore

4.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.