文献类型：期刊文献

英文题名：Anchoring Ni/NiO heterojunction on freestanding carbon nanofibers for efficient electrochemical water oxidation

作者：Liang, Chen[1];Wang, Keyu[1];Xu, Fang[1];Wang, Yixing[1];Li, Shiyi[1];Qu, Kai[1];Lei, Linfeng[1];Zhuang, Linzhou[1];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：626

起止页码：995

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20222912386153);WOS:【SCI-EXPANDED(收录号:WOS:000829361900003)】；

基金：This work was financially supported by the National Natural Science Foundations of China (Grant No. 21908054, 22075076 and 22005098) , and Central Government Funds for Guiding Local Science and Technology Development (Grant No. 2021Szvup040) .

语种：英文

外文关键词：Oxygen evolution reaction; N-doped carbon nanofibers; Ni/NiO catalysts; Electrospinning; Self-standing

摘要：Rational design of low-cost and efficient electrocatalyst for the anodic oxygen evolution reaction (OER) to replace noble-metal-based catalysts is greatly desired for the large-scale application of water electrocatal-ysis. And compared with the conventional powdery catalysts, the freestanding electrode architecture is more attractive owing to the enhanced kinetics and stability. In this work, we report an electrospinning-carbonization-post oxidation strategy to develop the freestanding N-doped carbon nano -fibers anchored with Ni/NiO nanoparticles (denoted as Ni/NiO-NCNFs) as efficient OER electrocatalyst. In the synthesized Ni/NiO-NCNFs, the conductive ultrathin carbon layer could promote electron transfer and thus improve the electrocatalytic activity. Meanwhile, the ratio between Ni and NiO could be regulated by tuning the oxidation duration, so as to optimize the adsorption energy of intermediates and improve the OER activity. The Ni/NiO-NCNFs prepared with the oxidation time of 3 h exhibit a promising OER activity and long-term operation durability in 0.1 M KOH solution, requiring an overpotential as small as 153 mV to achieve a current density of 10 mA cm(-2). Its overpotential is far lower than that of the reported OER catalysts. This work offers an efficient pathway to develop low-cost and highly active freestanding transitional metal-based OER electrocatalyst for potential renewable electrochemical energy conversion. (C) 2022 Published by Elsevier Inc.