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Type: Journal article
Title: Promotion of electrocatalytic hydrogen evolution reaction on nitrogen-doped carbon nanosheets with secondary heteroatoms
Author: Qu, K.
Zheng, Y.
Zhang, X.
Davey, K.
Dai, S.
Qiao, S.
Citation: ACS Nano, 2017; 11(7):7293-7300
Publisher: American Chemical Society
Issue Date: 2017
ISSN: 1936-0851
Statement of
Konggang Qu, Yao Zheng, Xianxi Zhang, Ken Davey, Sheng Dai and Shi Zhang Qiao
Abstract: Dual heteroatom-doped carbon materials are efficient electrocatalysts via a synergistic effect. With nitrogen as the primary dopant, boron, sulfur, and phosphorus can be used as secondary elements for co-doped carbons. However, evaluation and analysis of the promotional effect of B, P, and S to N-doped carbons has not been widely researched. Here we report a robust platform that is constructed through polydopamine to prepare N,B-, N,P-, and N,S-co-doped carbon nanosheets, characterized by similar N species content and efficient B, P, and S doping. Systematic investigation reveals S to have the greatest promotional effect in hydrogen evolution reactions (HER) followed by P and that B decreases the activity of N-doped carbons. Experimental and theoretical analyses show the secondary heteroatom promotional effect is impacted by the intrinsic structures and extrinsic surface areas of both materials, i.e., electronic structures exclusively determine the catalytic activity of active sites, while large surface areas optimize apparent HER performance.
Keywords: dual-doped carbons
hydrogen evolution reaction
water splitting
Rights: © 2017 American Chemical Society
DOI: 10.1021/acsnano.7b03290
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Physics publications

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