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A Zn-doped Ni 3 S 2 nanosheet array as a high-performance electrochemical water oxidation catalyst in alkaline solution

2017; Royal Society of Chemistry; Volume: 53; Issue: 92 Linguagem: Inglês

10.1039/c7cc06668f

1364-548X

Qin Liu, Lisi Xie, Zhiang Liu, Gu Du, Abdullah M. Asiri, Xuping Sun,

Electrochemical Analysis and Applications

It is of high importance to design efficient electrocatalysts for the oxygen evolution reaction (OER) at alkaline pH. In this communication, we report the development of a Zn-doped Ni3S2 nanosheet array on Ni foam (Zn-Ni3S2/NF) as a high-performance and durable electrocatalyst for the OER. Such Zn-Ni3S2/NF drives a catalytic current density of 100 mA cm-2 with the requirement of an OER overpotential of 330 mV, 90 mV less than that for Ni3S2/NF. Furthermore, Zn-Ni3S2/NF demonstrates excellent long-term electrochemical durability maintaining its activity at an overpotential of 300 mV for 20 h.