Efficient and stable hybrid electrocatalyst of mixed MnP-MoP nanoparticles‒N,P-codoped graphene for hydrogen evolution reaction

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 593; p. 124609
• Main Authors: Nguyen, C.D., Nguyen, Van-Huy, Vu, Thien Y., Pham, L.M. T., Vu-Huynh, K.L.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 20-05-2020
• Subjects: Electrocatalyst; Hydrogen evolution reaction; Mixed MnP-MoP nanoparticles; N,P-codoped graphene; Nanohybrid; Hydrogen evolution reaction; Nanohybrid; Electrocatalyst; N,P-codoped graphene; Mixed MnP-MoP nanoparticles
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2020.124609

[Display omitted]
•Efficient and stable nanohybrid electrocatalyst of mixed MnP-MoP nanoparticles and N,P-codoped graphene has been fabricated through effective and simple approach.•The as-synthesized MnP-MoP NPs/N,P-Gr hybrid exhibited high HER performance with a low overpotential, a small Tafel slope, and large electrochemical active surface area.•Interesting, the MnP-MoP NPs/N,P-Gr hybrid showed superior long-term electrochemical durability toward the HER during 26 h stability test.
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.