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https://hdl.handle.net/2440/114645
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Type: | Journal article |
Title: | Nitrogen-promoted molybdenum dioxide nanosheets for electrochemical hydrogen generation |
Author: | Yan, J. Li, L. Ji, Y. Li, P. Kong, L. Cai, X. Li, Y. Ma, T. Liu, S. |
Citation: | Journal of Materials Chemistry A, 2018; 6(26):12532-12540 |
Publisher: | Royal Society of Chemistry |
Issue Date: | 2018 |
ISSN: | 2050-7488 2050-7496 |
Statement of Responsibility: | Junqing Yan, Ling Li, Yujin Ji, Ping Li, Lingqiao Kong, Xuediao Cai, Youyong Li, Tianyi Ma and Shengzhong, (Frank) Liu |
Abstract: | Recently, the hydrogen evolution reaction (HER) via electrocatalytic water splitting has provided a promising and sustainable strategy for energy conversion and storage. A cheap and efficient electrocatalyst composed of earth-abundant elements is needed. Here, we have synthesized new samples of N–MoO₂ sheets with excellent stable Pt-like HER performance. A simple and repeatable strategy has been developed via the use of the cheap, simple small organic molecule urea as a reducing agent. We confirm that N doping can induce a disordered surface lattice and increase the number of proton adsorption sites with a relatively weak binding force. Owing to the cooperative effects of surface N doping, disordered surface distortion and the intrinsic nature of MoO₂, high HER activity can be achieved, with an overpotential of η = 96 mV vs. RHE at a current density of -10 mA cm⁻² and a Tafel slope of 33 mV per decade. Moreover, we further extended the synthesis method to Ni and Co systems with the formation of N– NiO/Ni and N–CoO/Co core–shell structures, which exhibited enhanced HER performance in comparison with bare MO/M (M = metal) samples. This study can help us design new earth-abundant electrocatalysts with further enhancements in catalytic performance. |
Description: | Published on 04 June 2018 |
Rights: | This journal is © The Royal Society of Chemistry 2018 |
DOI: | 10.1039/c8ta03638a |
Grant ID: | http://purl.org/au-research/grants/arc/DE150101306 http://purl.org/au-research/grants/arc/LP160100927 |
Published version: | http://dx.doi.org/10.1039/c8ta03638a |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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