- Title
- Nitrogen-promoted molybdenum dioxide nanosheets for electrochemical hydrogen generation
- Creator
- Yan, Junqing; Li, Ling; Ji, Yujin; Li, Ping; Kong, Lingqiao; Cai, Xuediao; Li, Youyong; Ma, Tianyi; Liu, Shengzhong (Frank)
- Relation
- Journal of Materials Chemistry A Vol. 6, Issue 26, p. 12532-12540
- Publisher Link
- http://dx.doi.org/10.1039/c8ta03638a
- Publisher
- Royal Society of Chemistry
- Resource Type
- journal article
- Date
- 2018
- Description
- 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.
- Subject
- hydrogen evolution reaction (HER); electrocatalytic water splitting; sustainable energy; energy conversion
- Identifier
- http://hdl.handle.net/1959.13/1412369
- Identifier
- uon:36477
- Identifier
- ISSN:2050-7488
- Language
- eng
- Full Text
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