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3. Single-Atom Co Doped in Ultrathin WO3 Arrays for the Enhanced Hydrogen Evolution Reaction in a Wide pH Range

Author

Xuanhui Qu, Zhao Yongzhi, Wu Haoyang, Zili Zhang, Jia Baorui, Kai Xi, Jia Liu, Sijia Liu, Tong Wu, Mingli Qin, Qin Wanjun, Liu Luan, Wang Yong, and Deyin Zhang

Subjects
Metal, Materials science, Chemical engineering, Electrical resistivity and conductivity, visual_art, Kinetics, Doping, visual_art.visual_art_medium, General Materials Science, Density functional theory, Electrocatalyst, Current density, Catalysis
Abstract

Owing to the scarcity of Pt, low-cost, stable, and efficient nonprecious metal-based electrocatalysts that can be applied in a wide pH range for the hydrogen evolution reaction (HER) are urgently required. Herein, a highly efficient and robust HER catalyst that is applicable at all pH values is fabricated, containing isolated Co-single atomic sites anchored in the self-supported WO3 arrays grown on Cu foam. At a current density of 10 mA cm-2, the HER overpotentials are 117, 105, and 149 mV at pH values of 0, 7, and 14, respectively, which are significantly lower than those of the undoped WO3, suggesting superior electrocatalytic H2-evolution activity at all pH values. The catalyst also exhibits long-term stability over a wide pH range, particularly in an acidic medium over 24 h, owing to the excellent anticorrosion properties of WO3. Density functional theory calculations prove that the enhanced HER activity is attributed to the isolated Co sites because these optimize the adsorption energy of H* species on WO3. Moreover, the high electrical conductivity of Co-doped WO3 and the three-dimensional array structure supported on the porous metal support afford a catalyst with suitable HER kinetics to enhance the catalytic performance.

Published
2021
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5. S and O Co-Coordinated Mo Single Sites in Hierarchically Porous Tubes from Sulfur–Enamine Copolymerization for Oxygen Reduction and Evolution

Author

Zhao, Yongzhi, primary, Zhang, Zili, additional, Liu, Luan, additional, Wang, Yong, additional, Wu, Tong, additional, Qin, Wanjun, additional, Liu, Sijia, additional, Jia, Baorui, additional, Wu, Haoyang, additional, Zhang, Deyin, additional, Qu, Xuanhui, additional, Qi, Genggeng, additional, Giannelis, Emmanuel P., additional, Qin, Mingli, additional, and Guo, Shaojun, additional

Published
2022
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6. Mesoporous Single Crystals with Fe‐Rich Skin for Ultralow Overpotential in Oxygen Evolution Catalysis

Author

Wang, Yong, primary, Zhao, Yongzhi, additional, Liu, Luan, additional, Qin, Wanjun, additional, Liu, Sijia, additional, Tu, Juping, additional, Qin, Yunpu, additional, Liu, Jianfang, additional, Wu, Haoyang, additional, Zhang, Deyin, additional, Chu, Aimin, additional, Jia, Baorui, additional, Qu, Xuanhui, additional, and Qin, Mingli, additional

Published
2022
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8. Correction to “Single-Atom Co Doped in Ultrathin WO3 Arrays for the Enhanced Hydrogen Evolution Reaction in a Wide pH Range”

Author

Liu, Luan, primary, Zhao, Yongzhi, additional, Wang, Yong, additional, Zhang, Zili, additional, Liu, Jia, additional, Wu, Tong, additional, Qin, Wanjun, additional, Liu, Sijia, additional, Jia, Baorui, additional, Wu, Haoyang, additional, Zhang, Deyin, additional, Qu, Xuanhui, additional, Xi, Kai, additional, and Qin, Mingli, additional

Published
2021
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9. Single-Atom Co Doped in Ultrathin WO3 Arrays for the Enhanced Hydrogen Evolution Reaction in a Wide pH Range

Author

Liu, Luan, primary, Zhao, Yongzhi, additional, Wang, Yong, additional, Zhang, Zili, additional, Liu, Jia, additional, Wu, Tong, additional, Qin, Wanjun, additional, Liu, Sijia, additional, Jia, Baorui, additional, Wu, Haoyang, additional, Zhang, Deyin, additional, Qu, Xuanhui, additional, Xi, Kai, additional, and Qin, Mingli, additional

Published
2021
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14. Single-Atom Co Doped in Ultrathin WO3Arrays for the Enhanced Hydrogen Evolution Reaction in a Wide pH Range

Author

Liu, Luan, Zhao, Yongzhi, Wang, Yong, Zhang, Zili, Liu, Jia, Wu, Tong, Qin, Wanjun, Liu, Sijia, Jia, Baorui, Wu, Haoyang, Zhang, Deyin, Qu, Xuanhui, Xi, Kai, and Qin, Mingli

Abstract

Owing to the scarcity of Pt, low-cost, stable, and efficient nonprecious metal-based electrocatalysts that can be applied in a wide pH range for the hydrogen evolution reaction (HER) are urgently required. Herein, a highly efficient and robust HER catalyst that is applicable at all pH values is fabricated, containing isolated Co-single atomic sites anchored in the self-supported WO3arrays grown on Cu foam. At a current density of 10 mA cm–2, the HER overpotentials are 117, 105, and 149 mV at pH values of 0, 7, and 14, respectively, which are significantly lower than those of the undoped WO3, suggesting superior electrocatalytic H2-evolution activity at all pH values. The catalyst also exhibits long-term stability over a wide pH range, particularly in an acidic medium over 24 h, owing to the excellent anticorrosion properties of WO3. Density functional theory calculations prove that the enhanced HER activity is attributed to the isolated Co sites because these optimize the adsorption energy of H* species on WO3. Moreover, the high electrical conductivity of Co-doped WO3and the three-dimensional array structure supported on the porous metal support afford a catalyst with suitable HER kinetics to enhance the catalytic performance.

Published
2021
Full Text
View/download PDF

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