Chinese Journal of Catalysis ›› 2023, Vol. 51: 113-123.DOI: 10.1016/S1872-2067(23)64469-9

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Efficient bi-functional catalysis of coupled MoSe2 nanosheet/Pt nanoparticles for methanol-assisted water splitting

Wei Qiaoa, Lice Yua, Jinfa Changb, Fulin Yanga, Ligang Fenga,*()   

  1. aSchool of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu, China
    bNanoScience Technology Center, University of Central Florida, FL 32826, Orlando, USA
  • Received:2023-04-28 Accepted:2023-06-05 Online:2023-08-18 Published:2023-08-31
  • Contact: *E-mail: ligang.feng@yzu.edu.cn, fenglg11@gmail.com (L. Feng).
  • Supported by:
    National Natural Science Foundation of China(21972124);National Natural Science Foundation of China(22102105);National Natural Science Foundation of China(22272148)

Abstract:

Efficient metal-support interaction induced high catalysis performance plays a significant role in energy conversion reactions. Herein, two-dimensional (2D) MoSe2 nanosheet-coupled Pt nanoparticles as efficient bi-functional catalysts were demonstrated for hydrogen production from the methanol-assisted water-splitting reaction. The oxophilic MoSe2 component with 2D structures optimized the adsorption of CO* and H* on Pt sites as demonstrated by spectroscopic and theoretical analysis, which resulted in enhanced catalytic ability in methanol-assisted water splitting reaction. The peak current density was 2.5 times higher than that of commercial Pt/C catalyst for methanol oxidation and a small overpotential of 32 mV was demanded to achieve a current density of 10 mA cm-2 for hydrogen evolution reaction in the methanol-containing electrolyte. When serviced as both cathode and anode, a low cell voltage of 0.66 V was required at 10 mA cm-2, significantly lower than that of 1.75 V required for water splitting. The high performance can be attributed to the oxophilicity of MoSe2 and their strong metal-support interaction that promoted the charge transfer and anti-CO poisoning of Pt sites. This work would be instructive for the development of novel bi-functional catalyst platforms for methanol-assisted water splitting in hydrogen production.

Key words: Molybdenum Selenide, 2D structure, Hydrogen production, Methanol-assisted water splitting, Pt nanoparticles