期刊
CATALYSIS TODAY
卷 355, 期 -, 页码 596-601出版社
ELSEVIER
DOI: 10.1016/j.cattod.2019.05.032
关键词
Water electrolysis; Urea electro-oxidation; Ni3S2 nanowires; Hydrogen evolution reaction; Bifunctional electrocatalyst
资金
- National Natural Science Foundation of China [21722702, 21872102]
- Tianjin Commission of Science and Technology as key technologies RD projects [16YFXTSF00440, 16ZXGTSF00020, 16YFZCSF00300, 18ZXSZSF00230, 18YFZCSF00770]
In this work, nickel sulfide (Ni3S2) nanowires were directly grown on nickel foam (Ni3S2@NF) via hydrothermal sulfurization of the nickel foam (NF). The Ni3S2@NF electrode exhibited excellent activity for urea oxidation reaction (UOR), which can deliver a current density of 100 mA cm(-2) at 0.36 V (vs SCE) for UOR in the electrolyte of 1.0M NaOH and 0.33M urea. The Ni3S2@NF electrode also exhibited excellent activity for hydrogen evolution reaction (HER), which shows decent stability and catalytic performance with an overpotential of similar to 127 mv at 10 mA cm(-2) in 1.0M NaOH. The excellent catalytic activity for both UOR and HER renders the Ni3S2@NF an efficient bifunctional electrocatalyst for urea-assisted electrolytic hydrogen production. As a result, the two-electrode system assembled with Ni3S2@NF can drive 20 mA cm(-2) at a cell voltage of only 1.49 V with excellent longevity.
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