Metal support effects in electrocatalysis at hexagonal boron nitride

A scanning electrochemical droplet cell technique has been employed to screen the intrinsic electrocatalytic hydrogen evolution reaction (HER) activity of hexagonal boron nitride (h-BN) nanosheets supported on different metal substrates (Cu and Au). Local (spatially-resolved) voltammetry and Tafel a...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2019-01, Vol.55 (5), p.628-631
Main Authors: Liu, Dan-Qing, Tao, Binglin, Ruan, Hong-Cheng, Bentley, Cameron L, Unwin, Patrick R
Format: Article
Language:English
Subjects:
Boron nitride
Catalysis
Charge exchange
Charge transfer
Copper
Gold
Hydrogen evolution reactions
Reaction kinetics
Substrates
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Summary:A scanning electrochemical droplet cell technique has been employed to screen the intrinsic electrocatalytic hydrogen evolution reaction (HER) activity of hexagonal boron nitride (h-BN) nanosheets supported on different metal substrates (Cu and Au). Local (spatially-resolved) voltammetry and Tafel analysis reveal that electronic interaction with the underlying metal substrate plays a significant role in modulating the electrocatalytic activity of h-BN, with Au-supported h-BN exhibiting significantly enhanced HER charge-transfer kinetics (exchange current is ca. two orders of magnitude larger) compared to Cu-supported h-BN, making the former material the superior support in a catalytic sense.
ISSN:1359-7345
1364-548X
DOI:10.1039/c8cc08517j