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15 results on '"Gao, Haixing"'

4. Boosting the Bifunctionality and Durability of Cobalt-Fluoride-Oxide Nanosheets for Alkaline Water Splitting Through Nitrogen-Plasma-Promoted Electronic Regulation and Structural Reconstruction

Author

Wang, Shuo, primary, Yuan, Cheng-Zong, additional, Zheng, Yunshan, additional, Kang, Yao, additional, Hui, Kwan San, additional, Wang, Kaixi, additional, Gao, Haixing, additional, Dinh, Duc Anh, additional, Cho, Young-Rae, additional, and Hui, Kwun Nam, additional

Published
2024
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9. In Situ Immobilizing Atomically Dispersed Ru on Oxygen-Defective Co3O4 for Efficient Oxygen Evolution

Author

Yuan, Cheng-Zong, primary, Wang, Shuo, additional, San Hui, Kwan, additional, Wang, Kaixi, additional, Li, Junfeng, additional, Gao, Haixing, additional, Zha, Chenyang, additional, Zhang, Xiaomeng, additional, Dinh, Duc Anh, additional, Wu, Xi-Lin, additional, Tang, Zikang, additional, Wan, Jiawei, additional, Shao, Zongping, additional, and Hui, Kwun Nam, additional

Published
2023
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12. Zeolitic Imidazolate Framework-Derived Co-Fe@NC for Rechargeable Hybrid Sodium–Air Battery with a Low Voltage Gap and Long Cycle Life

Author

Gao, Haixing, primary, Zhu, Siqi, additional, Kang, Yao, additional, Dinh, Duc Anh, additional, Hui, Kwan San, additional, Bin, Feng, additional, Fan, Xi, additional, Chen, Fuming, additional, Mahmood, Azhar, additional, Geng, Jianxin, additional, Cheong, Weng-Chon Max, additional, and Hui, Kwun Nam, additional

Published
2022
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13. Topological Defect and Sp3/Sp2 Carbon Interface Derived from Zif-8 with Linker Vacancies for Oxygen Reduction Reaction

Author

Gao, Haixing, primary, Wang, Shuo, additional, Cheong, Weng-Chon (Max), additional, Wang, Kaixi, additional, Huang, Aijian, additional, Ma, Junguo, additional, Li, Jia-Zhan, additional, San Hui, Kwan, additional, Dinh, Duc Anh, additional, Fan, Xi, additional, Bin, Feng, additional, Chen, Fuming, additional, and Hui, Kwun Nam, additional

Published
2022
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15. Synergistically boosting the elementary reactions over multiheterogeneous ordered macroporous Mo2C/NC‐Ru for highly efficient alkaline hydrogen evolution.

Author

Wang, Kaixi, Wang, Shuo, Hui, Kwan San, Gao, Haixing, Dinh, Duc Anh, Yuan, Chengzong, Zha, Chenyang, Shao, Zongping, Tang, Zikang, and Hui, Kwun Nam

Subjects
HYDROGEN evolution reactions, OXYGEN evolution reactions, ALKALINE solutions, HYDROGEN, CHEMICAL kinetics, DOPING agents (Chemistry), ELECTROCATALYSIS
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. [ABSTRACT FROM AUTHOR]

Published
2022
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