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1T/2H MoSe 2 -on-MXene heterostructure as bifunctional electrocatalyst for efficient overall water splitting

Electrochimica Acta, ISSN: 0013-4686, Vol: 326, Page: 134976
2019
  • 171
    Citations
  • 0
    Usage
  • 122
    Captures
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    171
    • Citation Indexes
      171
  • Captures
    122

Article Description

Designing inexpensive yet active bifunctional electrocatalysts to directly split water is extremely desirable for the ever-broader applications of hydrogen energy. Herein, we present a cost-efficient multiphasic 1T/2H MoSe 2 -on-MXene nanosheets heterostructure (denote as 1T/2H MoSe 2 /MXene) as electrocatalyst for efficient overall water splitting. On one hand, the 1T/2H MoSe 2 possesses abundant active sites providing relatively high electrocatalytic activity. On the other hand, the MXene nanosheets serve as high-conductive 2D substrates capable of promoting charge transfer ability and preventing 1T/2H MoSe 2 from aggregation. Consequently, the 1T/2H MoSe 2 /MXene catalyst in alkaline media exhibits remarkable synergy in both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activity having advantage over pure 1T/2H MoSe 2, MXene and 2H MoSe 2 /MXene counterparts. To be specific, for HER performance, the 1T/2H MoSe 2 /MXene reveals an overpotential (95 mV) and Tafel slope (91 mV dec −1 ); for OER performance, the 1T/2H MoSe 2 /MXene shows an overpotential (340 mV) and Tafel slope (90 mV dec −1 ). Particularly, when 1T/2H MoSe 2 /MXene serving as bifunctional electrocatalyst for overall water splitting, only 1.64 V is requested to attain a current density of 10 mA cm −2. The 1T/2H MoSe 2 /MXene heterostructure also exhibits good durability in overall water splitting system.

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