期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 567, 期 -, 页码 308-315出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.02.030
关键词
Cuprous sulfide; Nanorod; Water oxidation; Electrochemically active surface area; Water splitting
资金
- National Natural Science Foundation of China [51702234]
- Natural Science Foundation of Tianjin City [18JCQNJC78800]
Water oxidation reaction often impedes the overall water splitting for the multi-step electron transfer process. Transition metal sulfides are earth abundant and widely studied for accelerating water splitting reactions. Cuprous sulfide, which is a common mineral and generally regarded as less active for oxygen evolution reaction, can also effectively promote water oxidation by introducing coarse surfaces on the asprepared Cu2S nanorod arrays, with a largely increased double layer capacitance and thereby a greatly improved electrochemically active surface area, which only needs an overpotential of 360 mV to deliver 50 mA cm(-2) and exhibits a rapid kinetics for oxygen evolution reaction. The fabrication strategy of creating coarse surfaces on pre-synthesized nanostructures for increased electrochemically active surface area can be promising for developing precious-metal-free electrocatalysts by providing more active sites and surface areas for water oxidation, and is also valuable for promoting the activity of less active but earth-abundant materials to achieve a better cost-effectiveness in scale-up application of water splitting technology. (C) 2020 Elsevier Inc. All rights reserved.
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