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Porous Mo 2 C−MoP Heterostructure on Carbon Cloth for Efficient Hydrogen Evolution Reaction over a Broad pH Range
Author(s) -
He Mengci,
Shi Hongyan,
Sun Xiudong,
Gao Bo
Publication year - 2021
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202001639
Subject(s) - tafel equation , x ray photoelectron spectroscopy , heterojunction , materials science , electrolyte , catalysis , chemical engineering , raman spectroscopy , adsorption , carbon fibers , nanostructure , inorganic chemistry , chemistry , electrochemistry , nanotechnology , electrode , composite material , organic chemistry , physics , optoelectronics , optics , composite number , engineering
Heterogeneous structure composed of different active materials is an important strategy to improve the HER performance of catalysts, due to the synergistic effects on the interface. Here, we synthesized a Mo 2 C−MoP heterostructure by phosphating porous β‐Mo 2 C nanostructures with red phosphorus powder. XRD, Raman, XPS, SEM and TEM results suggested that Mo 2 C−MoP heterostructure with porous nanostructures were obtained on carbon cloth at 550 °C (MoCP‐550), which showed remarkable HER activity over a broad pH range. A low η 10 of 51 mV and a small Tafel slope of 56.7 mV dec −1 was achieved in 1.0 M KOH, and a low η 10 of 82 mV and a small Tafel slope of 49.8 mV dec −1 in 0.5 M H 2 SO 4 . MoCP‐550 also exhibited excellent electrocatalytic stability in both alkaline and acidic electrolytes. Density functional theory (DFT) calculations identified that Mo 2 C−MoP heterostructure has more suitable H * adsorption free energy compared to pure Mo 2 C and pure MoP.