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Metal support effects in electrocatalysis at hexagonal boron nitride

Author:
LiuThese authors contributed equally to this work., Dan-Qing, Tao, Binglin, Ruan, Hong-Cheng, Bentley, Cameron L., Unwin, Patrick R.
Source:
Chemical communications 2019 v.55 no.5 pp. 628-631
ISSN:
1364-548X
Subject:
boron nitride, chemical reactions, copper, copper nanoparticles, droplets, electrochemistry, gold, hydrogen production, nanogold, nanosheets
Abstract:
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.
Agid:
6269178