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18 results on '"Bu, Shuyu"'

10. Metal–Nitrogen–Carbon Single‐Atom Aerogels as Self‐Supporting Electrodes for Dechlorination of 1,2‐Dichloroethane

Author

Gan, Guoqiang, primary, Zhang, Xiaoqing, additional, Bu, Shuyu, additional, Gao, Qili, additional, Kong, Xin, additional, Lei, Yechen, additional, Zhu, Anquan, additional, Liu, Kai, additional, Luan, Chuhao, additional, Zhang, Tian, additional, Li, Yang, additional, Lee, Chun‐Sing, additional, and Zhang, Wenjun, additional

Published
2022
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11. “Dual Mediator System” Enables Efficient and Persistent Regulation toward Sulfur Redox Conversion in Lithium–Sulfur Batteries

Author

Jiao, Long, primary, Jiang, Hao, additional, Lei, Yechen, additional, Wu, Shuilin, additional, Gao, Qili, additional, Bu, Shuyu, additional, Kong, Xin, additional, Yang, Shuo, additional, Shu, Dengkun, additional, Li, Chenyang, additional, Li, Heng, additional, Cheng, Bowen, additional, Lee, Chun-Sing, additional, and Zhang, Wenjun, additional

Published
2022
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15. Hydrogen Evolution Reaction: Nitrogen‐Doped Graphene‐Encapsulated Nickel–Copper Alloy Nanoflower for Highly Efficient Electrochemical Hydrogen Evolution Reaction (Small 48/2019)

Author

Liu, Bin, primary, Peng, Hui‐Qing, additional, Cheng, Junye, additional, Zhang, Kui, additional, Chen, Da, additional, Shen, Dong, additional, Wu, Shuilin, additional, Jiao, Tianpeng, additional, Kong, Xin, additional, Gao, Qili, additional, Bu, Shuyu, additional, Lee, Chun‐Sing, additional, and Zhang, Wenjun, additional

Published
2019
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16. Nitrogen‐Doped Graphene‐Encapsulated Nickel–Copper Alloy Nanoflower for Highly Efficient Electrochemical Hydrogen Evolution Reaction

Author

Liu, Bin, primary, Peng, Hui‐Qing, additional, Cheng, Junye, additional, Zhang, Kui, additional, Chen, Da, additional, Shen, Dong, additional, Wu, Shuilin, additional, Jiao, Tianpeng, additional, Kong, Xin, additional, Gao, Qili, additional, Bu, Shuyu, additional, Lee, Chun‐Sing, additional, and Zhang, Wenjun, additional

Published
2019
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17. Facet-Dependent Evolution of Active Components on Spinel Co3O4for Electrochemical Ammonia Synthesis

Author

Zhu, Anquan, Liu, Heng, Bu, Shuyu, Liu, Kai, Luan, Chuhao, Lin, Dewu, Gan, Guoqiang, Zhou, Yin, Zhang, Tian, Liu, Kunlun, Hong, Guo, Li, Hao, and Zhang, Wenjun

Abstract

Spinel cobalt oxides (Co3O4) have emerged as a promising class of catalysts for the electrochemical nitrate reduction reaction (eNO3RR) to ammonia, offering advantages such as low cost, high activity, and selectivity. However, the specific role of crystallographic facets in determining the catalysts’ performance remains elusive, impeding the development of efficient catalysts. In this study, we have synthesized various Co3O4nanostructures with exposed facets of {100}, {111}, {110}, and {112}, aiming to investigate the dependence of the eNO3RR activity on the crystallographic facets. Among the catalysts tested, Co3O4{111} shows the best performance, achieving an ammonia Faradaic efficiency of 99.1 ± 1.8% with a yield rate of 35.2 ± 0.6 mg h–1cm–2at −0.6 V vs RHE. Experimental and theoretical results reveal a transformation process in which the active phases evolve from Co3O4to Co3O4–xwith oxygen vacancy (Ov), followed by a Co3O4–x-Ov/Co(OH)2hybrid, and finally Co(OH)2. This process is observed for all facets, but the formation of Ovand Co(OH)2is the most rapid on the (111) surface. The presence of Ovsignificantly reduces the free energy of the *NH2intermediate formation from 1.81 to −0.53 eV, and plentiful active sites on the densely reconstructed Co(OH)2make Co3O4{111} an ideal catalyst for ammonia synthesis via eNO3RR. This work provides insights into the understanding of the realistic active components, offers a strategy for developing highly efficient Co-based spinel catalysts for ammonia synthesis through tuning the exposed facets, and helps further advance the design and optimization of catalysts in the field of eNO3RR.

Published
2024
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18. Facet-Dependent Evolution of Active Components on Spinel Co 3 O 4 for Electrochemical Ammonia Synthesis.

Author

Zhu A, Liu H, Bu S, Liu K, Luan C, Lin D, Gan G, Zhou Y, Zhang T, Liu K, Hong G, Li H, and Zhang W

Abstract

Spinel cobalt oxides (Co 3 O 4 ) have emerged as a promising class of catalysts for the electrochemical nitrate reduction reaction (eNO 3 RR) to ammonia, offering advantages such as low cost, high activity, and selectivity. However, the specific role of crystallographic facets in determining the catalysts' performance remains elusive, impeding the development of efficient catalysts. In this study, we have synthesized various Co 3 O 4 nanostructures with exposed facets of {100}, {111}, {110}, and {112}, aiming to investigate the dependence of the eNO 3 RR activity on the crystallographic facets. Among the catalysts tested, Co 3 O 4 {111} shows the best performance, achieving an ammonia Faradaic efficiency of 99.1 ± 1.8% with a yield rate of 35.2 ± 0.6 mg h -1 cm -2 at -0.6 V vs RHE. Experimental and theoretical results reveal a transformation process in which the active phases evolve from Co 3 O 4 to Co 3 O 4- x with oxygen vacancy (O v ), followed by a Co 3 O 4- x -O v /Co(OH) 2 hybrid, and finally Co(OH) 2 . This process is observed for all facets, but the formation of O v and Co(OH) 2 is the most rapid on the (111) surface. The presence of O v significantly reduces the free energy of the *NH 2 intermediate formation from 1.81 to -0.53 eV, and plentiful active sites on the densely reconstructed Co(OH) 2 make Co 3 O 4 {111} an ideal catalyst for ammonia synthesis via eNO 3 RR. This work provides insights into the understanding of the realistic active components, offers a strategy for developing highly efficient Co-based spinel catalysts for ammonia synthesis through tuning the exposed facets, and helps further advance the design and optimization of catalysts in the field of eNO 3 RR.

Published
2024
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