期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 44, 期 26, 页码 12931-12940出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.03.218
关键词
Electrocatalysts; Hydrogen evolution reaction (HER); CozNiySx@PPy; Electrodeposition; Non-noble-metal electrode
资金
- National Natural Science Foundation of China [21878206, 21576184]
- Science and Technology Innovation Project for Excellent Talents of Shanxi Province [201805D211040]
Transition-metal chalcogenides as the promising alternatives to noble-metal-based electrocatalysts for hydrogen evolution reaction (HER) with high activity and durability in water splitting have attracted extensive attention in recent years. Herein, CozNiySxPPy composites with three-dimensional (3D) cauliflower-like were firstly prepared on carbon fiber paper (CFP) via a simple and efficient electrochemical reduction of elemental sulfur in the precursor of S@PPy composite coated on CFP to react with Co and Ni ions in the electrolyte. The optimum electrode, i.e., CozNiySx@PPy/CFP-6 (A-6) prepared by using an electrolyte with a Co/Ni molar ratio of 0/6, showed excellent catalytic activity (with an overpotential of 185 mV@10 mA cm(-2) and a small Tafel slope of 78.13 mV dec(-1)) as well as long-term stability (at least 100 h) in 1 M KOH solutions. This work provides a novel way to fabricate effective and non-noble-metal electrodes for HER in water splitting. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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