Chinese Journal of Catalysis ›› 2024, Vol. 64: 143-151.DOI: 10.1016/S1872-2067(24)60081-1
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Hui Fu, Jin Tian, Qianqian Zhang, Zhaoke Zheng, Hefeng Cheng, Yuanyuan Liu, Baibiao Huang, Peng Wang()
Received:
2024-05-31
Accepted:
2024-06-17
Online:
2024-09-18
Published:
2024-09-19
Contact:
* E-mail: Supported by:
Hui Fu, Jin Tian, Qianqian Zhang, Zhaoke Zheng, Hefeng Cheng, Yuanyuan Liu, Baibiao Huang, Peng Wang. Single-atom modified graphene cocatalyst for enhanced photocatalytic CO2 reduction on halide perovskite[J]. Chinese Journal of Catalysis, 2024, 64: 143-151.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(24)60081-1
Fig. 1. (a) Schematic illustration of the synthetic process of Co-NG. SEM (b), TEM (c) and STEM-HAADF (d,e) images of Co-NG. Co XANES K-edge spectra (f) and FT-EXAFS spectra (g) of Co-NG with respect to the reference samples.
Fig. 3. XRD patterns (a) and UV-vis absorption spectra (b) of Cs3Bi2Br9, Co-NG and Cs3Bi2Br9/Co-NG. XPS spectra of Cs 3d (c), Bi 4f (d) and Br 3d (e) of Cs3Bi2Br9 and Cs3Bi2Br9/Co-NG. (f) XPS spectra of Co 2p of Co-NG and Cs3Bi2Br9/Co-NG.
Fig. 4. (a) Photocatalytic CO2 reduction performance of Cs3Bi2Br9 and Co-NG under different reaction conditions (with or without light, catalyst and CO2 atmosphere). (b) CO production rate of Cs3Bi2Br9 and Cs3Bi2Br9/xCo-NG (x = 1, 3, 5 and 7). (c) Photocatalytic CO2 reduction performance of Cs3Bi2Br9/5Co-NG during 10 consecutive cycles of experiments. Each cycle is 4 h. (d) XRD patterns of Cs3Bi2Br9/5Co-NG before and after photocatalytic cycling measurements.
Fig. 5. Surface scan KPFM image (a), surface photovoltage mapping image (b) and surface potential curve (c) of Cs3Bi2Br9/Co-NG. Single-particle PL images of Cs3Bi2Br9 (d) and Cs3Bi2Br9/Co-NG (e). PL spectra (f) and TRPL spectra (g) of Cs3Bi2Br9 and Cs3Bi2Br9/Co-NG. TA spectra of Cs3Bi2Br9 (h) and Cs3Bi2Br9/Co-NG (i). (j) Transient photocurrent response curves of Cs3Bi2Br9 and Cs3Bi2Br9/Co-NG.
Fig. 6. (a,b) In situ DRIFTS measurement for CO2 reduction of Cs3Bi2Br9/Co-NG under dark and light irradiation. In-situ XPS spectra of Bi 4f (c), N 1s (d) and Co 2p (e) of Cs3Bi2Br9/Co-NG under dark and light conditions. (f) Gibbs free energy diagrams of intermediates generated during CO2-to-CO catalysis over Cs3Bi2Br9 and Cs3Bi2Br9/Co-NG. (g) The possible photocatalytic CO2 reduction mechanism in the Cs3Bi2Br9/Co-NG photocatalytic system.
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