Applied Catalysis B: Environmental 235 (2018) 36–44 Contents lists available at ScienceDirect Applied Catalysis B: Environmental journal homepage: www.elsevier.com/locate/apcatb Nanocomposites of transition-metal carbides on reduced graphite oxide as catalysts for the hydrogen evolution reaction a a b a a, Seok Ki Kim , Yang Qiu , Yin-Jia Zhang , Robert Hurt , Andrew Peterson School of Engineering, Brown University, Providence, RI 02912, United States Department of Chemistry, Brown University, Providence, RI 02912, United States ARTIC L E I NF O ABSTRAC T Keywords: Transition metal carbides (TMC), Mo C, Fe C, and WC·W C, were synthesized as well-dispersed nanoparticles on 2 3 2 Transition metal carbides a reduced graphite oxide (rGO) substrate and each of their hydrogen evolution reaction (HER) activities was Structure sensitivity compared with that of a bulk TMC powder. Among the TMC/rGO nanocomposites, only Mo C/rGO exhibited an Hydrogen evolution reaction obvious increase in the capacitance-normalized current density compared to the bulk powder. We performed density functional theory calculations which suggest that the distinctive activity of Mo C can be attributed to the structure-sensitive binding energies of atomic H, which binds less strongly on the stepped surface than the ﬂat surface of Mo C, while other
Applied Catalysis B: Environmental – Elsevier
Published: Nov 5, 2018
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