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https://hdl.handle.net/2440/110905
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Type: | Journal article |
Title: | Identification of pH-dependent synergy on Ru/MoS₂ interface: a comparison of alkaline and acidic hydrogen evolution |
Other Titles: | Identification of pH-dependent synergy on Ru/MoS(2) interface: a comparison of alkaline and acidic hydrogen evolution |
Author: | Liu, J. Zheng, Y. Zhu, D. Vasileff, A. Ling, T. Qiao, S. |
Citation: | Nanoscale, 2017; 9(43):16616-16621 |
Publisher: | Royal Society of Chemistry |
Issue Date: | 2017 |
ISSN: | 2040-3364 2040-3372 |
Statement of Responsibility: | Jinlong Liu, Yao Zheng, Dongdong Zhu, Anthony Vasileff, Tao Ling and Shi-Zhang Qiao |
Abstract: | Engineering bifunctional interfaces for enhanced alkaline hydrogen evolution reaction (HER) kinetics is achieved by rational coupling of Ru nanoparticles and defect-rich MoS₂ nanosheets via a simple wet-chemical method. Comprehensive material characterizations, especially high-resolution transmission electron microscopy, reveal well-defined interfaces between both components, leading to interfacial synergy whereby Ru expedites water dissociation and nearby defect-rich MoS₂ enables favorable hydrogen adsorption for recombination into H₂. The designed Ru/MoS₂ material demonstrates remarkable catalytic activity towards alkaline HER (-13 mV at -10 mA cm⁻²) with stable operation after 12 h or 1000 cycles, which is superior to almost all Ru-based and MoS₂-based electrocatalysts and even outperforms commercial 20 wt% Pt/C at overpotentials larger than -78 mV in alkaline media. No improved HER activity is observed for Ru/MoS₂ in acidic electrolyte (-96 mV at -10 mA cm⁻²), which is even inferior to Ru/CP (-78 mV at -10 mA cm⁻²). The correlation between alkaline and acidic HER results confirms that the intrinsic HER activity of this material originates from the desired synergistic effect under alkaline conditions. |
Rights: | This journal is © The Royal Society of Chemistry 2017 |
DOI: | 10.1039/c7nr06111k |
Grant ID: | http://purl.org/au-research/grants/arc/DP140104062 http://purl.org/au-research/grants/arc/DP160104866 http://purl.org/au-research/grants/arc/DP170104464 http://purl.org/au-research/grants/arc/LP160100927 |
Published version: | http://dx.doi.org/10.1039/c7nr06111k |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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