Trends in Hydrogen Evolution Activity of Metal‐Modified Molybdenum Carbides in Alkaline and Acid Electrolytes | Zendy

Zhang Qian | Zendy; Tackett Brian M. | Zendy; Wu Qiyuan | Zendy; Chen Jingguang G. | Zendy

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Trends in Hydrogen Evolution Activity of Metal‐Modified Molybdenum Carbides in Alkaline and Acid Electrolytes

Author(s) -

Zhang Qian,

Tackett Brian M.,

Wu Qiyuan,

Chen Jingguang G.

Publication year - 2016

Publication title -

chemelectrochem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 59

ISSN - 2196-0216

DOI - 10.1002/celc.201600171

Subject(s) - nanocrystalline material , x ray photoelectron spectroscopy , electrolyte , molybdenum , metal , palladium , nickel , hydrogen , carbide , inorganic chemistry , platinum , materials science , chemistry , catalysis , metallurgy , chemical engineering , electrode , nanotechnology , organic chemistry , engineering , biochemistry

Relatively high surface area nanocrystalline molybdenum carbide (Mo 2 C) was modified with 5 wt % silver, copper, nickel, platinum, and palladium nanoparticles and subsequently assessed for its hydrogen evolution reaction (HER) activity in alkaline and acid electrolytes. Density functional theory (DFT)‐calculated hydrogen binding energies predicted that Pt–Mo 2 C and Pd–Mo 2 C should be most active, which was confirmed with experimental results. Similar activity trends were observed at both high and low pH values, with Cu–Mo 2 C being the least active. X‐ray photoelectron spectroscopy (XPS) confirmed that metal particles remained on the sample before and after HER testing. Pt‐modified nanocrystalline Mo 2 C showed superior HER activity compared with Pt‐modified commercial Mo 2 C, making it a potential replacement for bulk Pt in alkaline membrane electrolyzers. The positive effect on the HER activity of the metal contact with non‐passivated Mo 2 C surfaces was also demonstrated.

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