期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 42, 页码 23741-23749出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b08103
关键词
hydrogen evolution; molybdenum disulfide; microwave; active sites; reactant-protecting
资金
- National Basic Research Program of China [2013CB934101]
- National Natural Science Foundation of China [21203075, 21373102, 21433002, 51402110]
- Fundamental Research Funds for Central Universities [21615402]
- Guangdong Higher Education Institute [YQ2013022]
- Guangdong Natural Science Funds [2015A030306014, 2014TQ01N036]
The exposure of rich active sites is crucial for MW-assisted MoS2 nano catalysts in efficient hydrogen evolution reaction (HER). However, the active (010) and (100) planes tend to vanish during preparation because of their high surface energy. Employing the protection by thiourea (TU) reactant, a microwave-assisted reactant-protecting strategy is successfully introduced to fabricate active-site-rich MoS2 (AS-rich MoS2). The bifunctionality of TU, as both a reactant and a capping agent, ensures rich interactions for the effective protection and easy exposure of active sites in MoS2 avoiding the complicated control and fussy procedure related to additional surfactants and templates. The as-obtained AS-rich MoS2 presents the superior HER activity characterized by its high current density (j = 68 mA cm(-2) at -300 mV vs RHE), low Tafel slope (53.5 mV dec(-1)) and low onset overpotential (180 mV), which stems from the rich catalytic sites and the promoted conductivity. This work elucidates a feasible way toward high performance catalysts via interface engineering, shedding some light on the development of emerging nanocatalysts.
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