Chinese Journal of Catalysis ›› 2025, Vol. 75: 115-124.DOI: 10.1016/S1872-2067(25)64752-8
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Sui Qia, Li Huia, Tao Chena,d, Li Rana, Gao Yujiea, Yang Tingtinga, Zheng Hongshuaia, Xia Lixina,b,*(), Li Feic,*(
), Jiang Yia,*(
)
Received:
2025-03-10
Accepted:
2025-05-06
Online:
2025-08-18
Published:
2025-07-22
Contact:
*E-mail: lixinxia@lnu.edu.cn (L. Xia),
lifei@dlut.edu.cn (F. Li),
jiangyi@lnu.edu.cn (Y. Jiang).
Supported by:
Sui Qi, Li Hui, Tao Chen, Li Ran, Gao Yujie, Yang Tingting, Zheng Hongshuai, Xia Lixin, Li Fei, Jiang Yi. Exploring internal interface bonding and multi-metal synergy for boosting photoelectrochemical water splitting[J]. Chinese Journal of Catalysis, 2025, 75: 115-124.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(25)64752-8
Fig. 1. (a) Schematic application of BVO/CoNi0.18Mn0.12(OH)xF. (b) SEM image of BVO. SEM (c) and TEM (d) images of BVO/CoNi0.18Mn0.12(OH)xF. (e) Element mappings of BVO/CoNi0.18Mn0.12(OH)xF. (f) High-resolution XPS of F 1s. AC-TEM image (g) and EELS spectra (h) of BVO/CoNi0.18Mn0.12(OH)xF.
Fig. 2. (a) J-V curves of BVO-based photoanodes. (b) Photocurrent density of various BVO/CoaNibMnc(OH)xF photoanodes measured at 1.23 V vs. RHE. (c) ABPE curves. (d) I-t curves and the content of Bi and V leaching from the electrode. (e) I-t curves of photoanodes containing two metals at 0.7 V vs. RHE. (f) I-t stability tests with and without Ni2+. (g) Linear fitting of capacitive currents versus scan rates.
Fig. 3. (a) Photocurrent density of various BVO-based photoanodes measured at 1.23 V vs. RHE. (b) BVO/CoNi0.18Mn0.12(OH)x photoanode before i-t stability tests (black arrow) and after i-t tests with (blue arrow) and without F- (orange arrow). (c) The schematic of the mechanism underlying the role of the Al2O3 layer. (d) Raman spectra. (e) Charge transfer efficiency (ηtrans) curves. (f) I-t curves measured at 0.7 V vs. RHE.
Fig. 4. (a) Corresponding Gibbs free energy. (b) Charge density difference of BVO/CoNi0.18Mn0.12(OH)xF, where charge depletion and accumulation are represented by cyan and yellow respectively. The Bader charge across the V-F-Co bridge. (c) The PDOS V located on the V-F-Co bond bridge in BVO/CoNi0.18Mn0.12(OH)xF. Co 2p spectra of BVO-based photoanodes: contour-projected images (d) and detailed spectra (e). (f) Schematic diagram of the mechanism of action of V-F bond.
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