Chinese Journal of Catalysis ›› 2023, Vol. 55: 182-190.DOI: 10.1016/S1872-2067(23)64554-1
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Liqing Wua, Qing Liangb, Jiayi Zhaoa, Juan Zhua, Hongnan Jiaa, Wei Zhangb,*(), Ping Caia,*(
), Wei Luoa,*(
)
Received:
2023-09-27
Accepted:
2023-10-25
Online:
2023-12-18
Published:
2023-12-07
Contact:
*E-mail: Supported by:
Liqing Wu, Qing Liang, Jiayi Zhao, Juan Zhu, Hongnan Jia, Wei Zhang, Ping Cai, Wei Luo. A Bi-doped RuO2 catalyst for efficient and durable acidic water oxidation[J]. Chinese Journal of Catalysis, 2023, 55: 182-190.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(23)64554-1
Fig. 1. Morphology and structure analysis. (a) XRD patterns of Bi0.15Ru0.85O2 and RuO2. (b) and (c) HAADF-STEM image of Bi0.15Ru0.85O2. (d) HAADF-STEM image and corresponding EDS elemental mapping of Bi0.15Ru0.85O2. (e) The high-resolution XPS spectrum of Ru 3p in Bi0.15Ru0.85O2 and RuO2. (f) Experimental Ru L2,3-edges XANES spectra of Bi0.15Ru0.85O2 and RuO2.
Fig. 2. Electrochemical performance of Bi0.15Ru0.85O2 in acidic medium. (a) LSV curves of Bi0.15Ru0.85O2, RuO2, and C-RuO2, recorded with a scan rate of 5 mV s?1. (b) Tafel plots of Bi0.15Ru0.85O2, RuO2, and C-RuO2, derived from the LSV curves. The operando Bode phase plots of (c) Bi0.15Ru0.85O2 and (d) RuO2. (e) Phase peak angles varies with the changes of potentials for Bi0.15Ru0.85O2 and RuO2. (f) Chronopotentiometric stability test of Bi0.15Ru0.85O2.
Fig. 3. Kinetic analysis. (a) LSV curves of Bi0.15Ru0.85O2 and RuO2 recorded at 25 and 65 °C, respectively. (b) The corresponding Eapp data at different potentials of Bi0.15Ru0.85O2, derived from the LSV curves at different temperatures. (c) The corresponding Eapp data at different potentials of RuO2, derived from the LSV curves at different temperatures. (d) UPS spectra of Bi0.15Ru0.85O2 and RuO2. (e) UV spectra of Bi0.15Ru0.85O2 and RuO2. (f) Summary of some major OER performance metrics of Bi0.15Ru0.85O2 and RuO2. The Eapp was calculated at 1.45 V vs. RHE.
Fig. 4. Theoretical analysis. In situ Raman spectra of Bi0.15Ru0.85O2 (a) and RuO2 (b), in which the red square indicating the formation of the OOH*. (c) Charge density distribution image for Bi0.15Ru0.85O2 based on DFT analysis. (d) Reaction pathways of Bi0.15Ru0.85O2 and RuO2 for OER.
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