Chinese Journal of Catalysis ›› 2026, Vol. 82: 266-277.DOI: 10.1016/S1872-2067(25)64923-0
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Haonan Lia, Wa Gaoa,*(
), Kangli Maa, Jian Leib, Olim Ruzimuradovc, Akhtam Samievc, Ya Chena,*(
), Jingxiang Lowa,d,*(
), Yue Lia
Received:2025-09-30
Accepted:2025-11-27
Online:2026-03-18
Published:2026-03-05
Contact:
* E-mail: Supported by:Haonan Li, Wa Gao, Kangli Ma, Jian Lei, Olim Ruzimuradov, Akhtam Samiev, Ya Chen, Jingxiang Low, Yue Li. Interfacial Ni-N bond in g-C3N4/CoNi2S4 for enhanced photocatalytic CO2 conversion[J]. Chinese Journal of Catalysis, 2026, 82: 266-277.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(25)64923-0
Fig. 1. (a) Schematic illustration of the preparation procedure of CN-VN/CoNi2S4. (b) TEM image of CN-VN. TEM (c), HRTEM (d), and elemental mappings images for C, N, Co, Ni and S (e) of CN-VN/CoNi2S4-3. (f) XRD patterns of CoNi2S4, g-C3N4, CN-VN and CN-VN/CoNi2S4 with different CoNi2S4 contents. (g) ESR spectra of CN-VN and CN-VN/CoNi2S4-3. (h) FTIR of CoNi2S4, g-C3N4, CN-VN and CN-VN/CoNi2S4-3.
Fig. 2. High-resolution XPS spectra of N 1s (a), Co 2p (b), and Ni 2p (c) for CN-VN, CoNi2S4 and CN-VN/CoNi2S4. Ni K-edge XANES (d) and Co K-edge XANES (e) profiles of different samples. Ni K-edge k3-weighted FT-EXAFS (f) and Co K-edge k3-weighted FT-EXAFS (g) spectra of different samples. WT-EXAFS contour plot of Ni k3-weighted (h) and Co k3-weighted (i) for CoNi2S4 and CN-VN/CoNi2S4.
Fig. 3. (a) CO2 TPD profiles of g-C3N4, CN-VN and CN-VN/CoNi2S4-3. (b) UV-vis-NIR DRS of g-C3N4, CN-VN, CoNi2S4 and CN-VN/CoNi2S4-3. (c) EIS Nyquist plots of CN-VN and CN-VN/CoNi2S4-3. Transient photocurrent density (d) and TR-PL spectra (e) of CN-VN and CN-VN/CoNi2S4-3. (f) EPR spectra for CN-VN, CoNi2S4, and CN-VN/CoNi2S4-3 catalysts of DMPO-?O2? adducts under light illumination.
Fig. 4. Comparison of the CO production after 5 h of photocatalytic CO2 conversion reaction (a) and corresponding average productivity (b) of CN-VN, CoNi2S4 and CN-VN/CoNi2S4. (c) CO production from photocatalytic CO2 reduction over CN-VN based photocatalysts. (d) Photocatalytic stability test of the CN-VN/CoNi2S4-3 for CO production. (e) CO productivity of the CN-VN/CoNi2S4-3 under different reaction conditions. (f) Mass spectrometry analysis of the photocatalytic CO2 conversion products over CN-VN/CoNi2S4-3 using 13CO2 as reactant.
Fig. 5. In-situ DRIFTS spectra for photocatalytic CO2 conversion over g-C3N4 (a), CN-VN (b), and CN-VN/CoNi2S4-3 (c). (d) Gibbs free energy diagram of CoNi2S4, CN-VN and CN-VN/CoNi2S4 at different catalytic sites. (e) Schematic diagram of proposed mechanism for photocatalytic reaction over CN-VN/CoNi2S4.
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