In Situ Generation of Bifunctional Fe-Doped MoS2 Nanocanopies for Efficient Electrocatalytic Water Splitting

作者：Jiang-Yan Xue, Fei-Long Li, Zhong‐Yin Zhao, Cong Li, Chun-Yan Ni, Hongwei Gu, David James Young, Jian‐Ping Lang · 发表于：Inorganic Chemistry · 年份：2019 · DOI：10.1021/acs.inorgchem.9b01814 · 被引用次数：127 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Advanced Photocatalysis Techniques

Design and synthesis of non-noble metal electrocatalysts with high activity and durability for the electrolysis of water is of great significance for energy conversion and storage. In this work, we prepared a series of Fe-doped MoS 2 nanomaterials by simple one-pot solvothermal reactions of (NH 4 ) 2 MoS 4 with FeCl 3 ·6H 2 O. An optimized working electrode of Fe-MoS 2 -5 displayed high hydrogen evolution reaction (HER) activity with a relatively small overpotential of 173 mV to achieve a current density of 10 mA cm –2 in 0.5 M H 2 SO 4, along with no significant change in catalytic performance even after 1000 cyclic voltammetry (CV) cycles. Fe-MoS 2 nanoparticles on nickel foam (NF; denoted as Fe-MoS 2 /NF) exhibited an overpotential of 230 mV at 20 mA cm –2 for the oxygen evolution reaction (OER) and 153 mV at 10 mA cm –2 for the HER in 1.0 M KOH electrolyte. Fe-MoS 2 /NF was stable for more than 140 h under these conditions. Furthermore, the two electrode system of Fe-MoS 2 /NF (anode)//Fe-MoS 2 /NF (cathode) electrodes demonstrated excellent electrocatalytic activity toward overall water splitting with a low potential of 1.52 V at 10 mA cm –2 in 1.0 M KOH electrolyte.