用于高效电催化水氧化的铁掺杂氢氧化铬纳米片的合成

synthesis of Fe-doped CrOOH nanosheets for efficient electrocatalytic water oxidation.

作者信息

Gao Min, Ma Ning, Yu Cuiping, Liu Yu

机构信息

State Key Laboratory of Bio-based Material and Green Papermaking, Qilu University of Technology, Jinan, Shandong, 250353, People's Republic of China.

School of Materials Science and Engineering, Hubei University, Wuhan, Hubei, 430062, People's Republic of China.

出版信息

Nanotechnology. 2021 Apr 20;32(28). doi: 10.1088/1361-6528/abf210.

DOI:10.1088/1361-6528/abf210

PMID:33765662

Abstract

The oxygen evolution reaction (OER) is a process in electrochemical water splitting with sluggish kinetics that needs efficient non-noble-metal electrocatalysts. There have been few studies of CrOOH electrocatalysts for water oxidation due to their low performance. Herein,synthesized Fe-doped CrOOH nanosheets on Ni foam (Fe-CrOOH/NF) were designed as electrocatalysts and performance in the OER was obviously improved. The effect of the amount of Fe doping was also investigated. Experiments revealed that the best performance of Fe-CrOOH/NF requires low overpotentials of 259 mV to reach 20 mA cmtogether with a turnover frequency of 0.245 sin 1.0 M KOH, which may suggest a new direction for the development of Fe-doped OER electrocatalysts.

摘要

析氧反应（OER）是电化学水分解过程中的一个反应，其动力学较为迟缓，需要高效的非贵金属电催化剂。由于CrOOH电催化剂性能较低，针对其用于水氧化的研究较少。在此，在泡沫镍上合成的铁掺杂CrOOH纳米片（Fe-CrOOH/NF）被设计为电催化剂，其在析氧反应中的性能得到了显著提升。同时还研究了铁掺杂量的影响。实验表明，Fe-CrOOH/NF在1.0 M KOH中具有最佳性能，达到20 mA/cm时的过电位低至259 mV，周转频率为0.245 s⁻¹，这可能为铁掺杂析氧反应电催化剂的开发指明了新方向。