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Published on: September 20, 2012
Multiphase interface coupling of Ni-based sulfide composites for high-current-density oxygen evolution
Jing Liang1, Zhifeng Zhao2, Zhanhua Su2
1College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin, 150025, China. lixiaofeng@hrbnu.edu.cn.
Abstract:
Constructing highly efficient electrocatalysts is vital to enhance oxygen evolution reaction (OER) performance at industrially relevant current densities. Herein, three-phase coupled Ni3S2/r-NiS/h-NiS composites are grown in situ on Ni foam (NNSN/NF) via a one-step solvothermal approach. The as-prepared composites need overpotentials of only 377 mV, 451 mV and 476 mV at 1000 mA cm-2 for the OER in alkaline freshwater, simulated seawater and seawater, respectively. In addition, the optimized catalyst exhibited long-term durability at 300 mA cm-2. Our work clarifies designing and preparing cost-effective Ni-based sulfide electrocatalysts for the OER in alkaline freshwater/simulated seawater/seawater under industrially relevant current densities.
