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Issue 25, 2018
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Selectively anchoring Pt single atoms at hetero-interfaces of γ-Al2O3/NiS to promote the hydrogen evolution reaction

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Abstract

Single-atom doping plays a vital role in catalysis by maximally taking advantage of atom efficiency. Herein, we report for the first time a new concept of selective single-atom doping with high loading via the crystal-lattice mismatch of a multicomponent hetero-nanostructure. Hetero-nanostructures, with exceptional properties, bring numerous vacancy defects or voids in the hetero-interfaces between the two different components, which can trap more atoms. In this work, single Pt atoms with an ultrahigh loading density of 2.8 wt% are selectively anchored on NiS in a three-dimensional flower-like NiS@Al2O3 heterostructure. This novel strategy can be expanded to a series of transition metal sulfide (TMS, NiS2, CoS2, and MnS) composites with large crystal-lattice mismatch. Pt atom doping remarkably enhances the catalytic performance. The Pt/NiS@Al2O3 exhibits an extremely high catalytic activity in the hydrogen evolution reaction, with a low overpotential of 34 mV and an excellent stability with a 2% increase in overpotential following 120 h under a constant density of 10 mA cm−2.

Graphical abstract: Selectively anchoring Pt single atoms at hetero-interfaces of γ-Al2O3/NiS to promote the hydrogen evolution reaction

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Supplementary files

Article information


Submitted
19 Mar 2018
Accepted
21 May 2018
First published
23 May 2018

J. Mater. Chem. A, 2018,6, 11783-11789
Article type
Paper

Selectively anchoring Pt single atoms at hetero-interfaces of γ-Al2O3/NiS to promote the hydrogen evolution reaction

Y. Feng, Y. Guan, H. Zhang, Z. Huang, J. Li, Z. Jiang, X. Gu and Y. Wang, J. Mater. Chem. A, 2018, 6, 11783
DOI: 10.1039/C8TA02556H

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