文献类型：期刊文献

英文题名：Hollow mesoporous NiCo2O4 nanocages as efficient electrocatalysts for oxygen evolution reaction

作者：Lv, Xiaoming[1];Zhu, Yihua[1];Jiang, Hongliang[1];Yang, Xiaoling[1];Liu, Yanyan[1];Su, Yunhe[1];Huang, Jianfei[1];Yao, Yifan[1];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2015

卷号：44

期号：9

起止页码：4148

外文期刊名：DALTON TRANSACTIONS

收录：;EI(收录号：20150900573679);WOS:【SCI-EXPANDED(收录号:WOS:000349993400030)】；

基金：This work was supported by the National Natural Science Foundation of China (21471056, 21236003, 21206042, 20925621, and 21176083), the Basic Research Program of Shanghai (13NM1400700, 13NM1400701), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Energy conversion - Transition metal oxides - Copper oxides - Mesoporous materials - Cobalt compounds - Coordination reactions - Platinum compounds - Transition metals - Oxygen

摘要：The design and fabrication of efficient and inexpensive electrodes for oxygen evolution reaction (OER) is essential for energy-conversion technologies. Herein, high OER activity is achieved using hollow meso-porous NiCo2O4 nanocages synthesized via a Cu2O-templated strategy combined with coordination reaction. The NiCo2O4 nanostructures with a hollow cavity, large roughness and high porosity show only a small overpotential of similar to 0.34 V at the current density of 10 mA cm(-2) and a Tafel slope of 75 mV per decade, which is comparable with the performance of the best reported transition metal oxide based OER catalysts in the literature. Meanwhile, the positive impacts of the nanocage structure and the Ni incorporation on the electrocatalytic performance are also demonstrated by comparing the OER activities of NiCo2O4 nanocages with Co3O4 nanocages, NiCo2O4 nanoparticles and 20 wt% Pt/C. Moreover, the NiCo2O4 nanocages also manifest superior stability to other materials. All these merits indicate that the hollow mesoporous NiCo2O4 nanocages are promising electrocatalysts for water oxidation.