In:
Angewandte Chemie, Wiley, Vol. 129, No. 26 ( 2017-06-19), p. 7718-7722
Abstract:
The metallic 1T‐MoS 2 has attracted considerable attention as an effective catalyst for hydrogen evolution reactions (HERs). However, the fundamental mechanism about the catalytic activity of 1T‐MoS 2 and the associated phase evolution remain elusive and controversial. Herein, we prepared the most stable 1T‐MoS 2 by hydrothermal exfoliation of MoS 2 nanosheets vertically rooted into rigid one‐dimensional TiO 2 nanofibers. The 1T‐MoS 2 can keep highly stable over one year, presenting an ideal model system for investigating the HER catalytic activities as a function of the phase evolution. Both experimental studies and theoretical calculations suggest that 1T phase can be irreversibly transformed into a more active 1T′ phase as true active sites in photocatalytic HERs, resulting in a “catalytic site self‐optimization”. Hydrogen atom adsorption is the major driving force for this phase transition.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v129.26
DOI:
10.1002/ange.201703066
Language:
English
Publisher:
Wiley
Publication Date:
2017
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505868-5
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506609-8
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514305-6
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505872-7
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1479266-7
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505867-3
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506259-7
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