Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 593, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2020.124609
Keywords
Mixed MnP-MoP nanoparticles; N,P-codoped graphene; Nanohybrid; Electrocatalyst; Hydrogen evolution reaction
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Funding
- Duy Tan University in Da Nang city andTon Duc Thang Universityin Ho Chi Minh city, Viet Nam
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Non-noble metal-based electrocatalysts with high activity and stability play a critical role in enhancing performance of electrochemical hydrogen evolution reaction (HER). Herein, we have successfully fabricated an effeicient and stable hybrid electrocatalyst containing well-dispersion of mixed MnP-MoP nanoparticles on N,P-codoped graphene nanosheets (denotes as MnP-MoP NPs/N,P-Gr) through facile and effective approach. The obtained MnP-MoP NPs/N,P-Gr hybrid showed high catalytic activity for HER in 1.0 M KOH solution, together with low overpotential of 74.2 mV and 154.9 mV to reach a current density of 10 mA cm and 50 mA cm(-2), respectively. Besides, the rapid kinetics of the HER reaction have been demonstrated by a corresponding small Tafel slope value of 57.7 mV dec(-1). The high HER performance of the MnP-MoP NPs/N,P-Gr hybrid could be inherited from the merits of graphene, N,P-codoped effect, and the synergistic effect between MnP-MoP NPs and N,P-codoped graphene substrate. Notably, the MnP-MoP NPs/N,P-Gr hybrid exhibited superior stability toward HER, with retaining its electrocatalytic performance after 26 h stability test.
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