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Wang, Kaixi, Wang, Shuo, Hui, Kwan San 
ORCID: https://orcid.org/0000-0001-7089-7587, Gao, Haixing, Dinh, Duc Anh, Yuan, Chengzong, Zha, Chenyang, Shao, Zongping, Tang, Zikang and Hui, Kwun Nam
(2022)
Synergistically boosting the elementary reactions over multiheterogeneous ordered macroporous Mo2C/NC-Ru for highly efficient alkaline hydrogen evolution.
Carbon Energy, 4 (5).
pp. 856-866.
ISSN 2637-9368
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Abstract
Simultaneously enhancing the reaction kinetics, mass transport, and gas release during alkaline hydrogen evolution reaction (HER) is critical to minimizing the reaction polarization resistance, but remains a big challenge. Through rational design of a hierarchical multiheterogeneous three-dimensionally (3D) ordered macroporous Mo2C-embedded nitrogen-doped carbon with ultrafine Ru nanoclusters anchored on its surface (OMS Mo2C/NC-Ru), we realize both electronic and morphologic engineering of the catalyst to maximize the electrocatalysis performance. The formed Ru-NC heterostructure shows regulative electronic states and optimized adsorption energy with the intermediate H*, and the Mo2C-NC heterostructure accelerates the Volmer reaction due to the strong water dissociation ability as confirmed by theoretical calculations. Consequently, superior HER activity in alkaline solution with an extremely low overpotential of 15.5 mV at 10 mA cm−2 with the mass activity more than 17 times higher than that of the benchmark Pt/C, an ultrasmall Tafel slope of 22.7 mV dec−1, and excellent electrocatalytic durability were achieved, attributing to the enhanced mass transport and favorable gas release process endowed from the unique OMS Mo2C/NC-Ru structure. By oxidizing OMS Mo2C/NC-Ru into OMS MoO3-RuO2 catalyst, it can also be applied as efficient oxygen evolution electrocatalyst, enabling the construction of a quasi-symmetric electrolyzer for overall water splitting. Such a device's performance surpassed the state-of-the-art Pt/C || RuO2 electrolyzer. This study provides instructive guidance for designing 3D-ordered macroporous multicomponent catalysts for efficient catalytic applications.
| Item Type: | Article |
|---|---|
| Additional Information: | Funding Information: This study was financially supported by the Science and Technology Development Fund, Macau SAR (File no. 0191/2017/A3, 0041/2019/A1, 0046/2019/AFJ, and 0021/2019/AIR), the University of Macau (File no. MYRG2018‐00192‐IAPME, and MYRG2020‐00187‐IAPME), and the UEA funding. |
| Uncontrolled Keywords: | heterostructure,hydrogen evolution reaction,molybdenum carbide,ordered macroporous structure,ruthenium nanoparticle,synergistic effect,renewable energy, sustainability and the environment,materials science (miscellaneous),energy (miscellaneous),materials chemistry,sdg 7 - affordable and clean energy ,/dk/atira/pure/subjectarea/asjc/2100/2105 |
| Faculty \ School: | Faculty of Science > School of Engineering (former - to 2024) |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 04 Apr 2024 10:30 |
| Last Modified: | 25 Sep 2024 17:44 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/94809 |
| DOI: | 10.1002/cey2.188 |
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