期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 1, 页码 328-332出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201609080
关键词
cation exchange reaction; electrical conductivity; electrocatalysis; nanostructures; oxygen evolution reaction
资金
- Collaborative Innovation Center of Suzhou Nano Science and Technology, MOST of China [2014CB932700]
- NSFC [21573206, 51371164, 51132007]
- Key Research Program of Frontier Sciences of the CAS [QYZDB-SSW-SLH017]
- Strategic Priority Research Program B of the CAS [XDB01020000]
- Hefei Science Center CAS [2015HSC-UP016]
- Fundamental Research Funds for the Central Universities
Precisely engineering the electrical conductivity represents a promising strategy to design efficient catalysts towards oxygen evolution reaction (OER). Here, we demonstrate a versatile partial cation exchange method to fabricate lamellar Ag-CoSe2 nanobelts with controllable conductivity. The electrical conductivity of the materials was significantly enhanced by the addition of Ag+ cations of less than 1.0%. Moreover, such a trace amount of Ag induced a negligible loss of active sites which was compensated through the effective generation of active sites as shown by the excellent conductivity. Both the enhanced conductivity and the retained active sites contributed to the remarkable electrocatalytic performance of the Ag-CoSe2 nanobelts. Relative to the CoSe2 nanobelts, the as-prepared Ag-CoSe2 nanobelts exhibited a higher current density and a lower Tafel slope towards OER. This strategy represents a rational design of efficient electrocatalysts through finely tuning their electrical conductivities.
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