Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (5): 1230-1237.DOI: 10.1016/S1872-2067(21)63868-8
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Yu Denga,†, Jue Lia,†, Rumeng Zhanga, Chunqiu Hanb, Yi Chenb, Ying Zhoub, Wei Liua, Po Keung Wongc, Liqun Yea()
Received:
2021-05-18
Accepted:
2021-06-11
Online:
2022-05-18
Published:
2022-03-23
Contact:
Liqun Ye
About author:
First author contact:†These authors contributed equally to this work.
Supported by:
Yu Deng, Jue Li, Rumeng Zhang, Chunqiu Han, Yi Chen, Ying Zhou, Wei Liu, Po Keung Wong, Liqun Ye. Solar-energy-driven photothermal catalytic C-C coupling from CO2 reduction over WO3-x[J]. Chinese Journal of Catalysis, 2022, 43(5): 1230-1237.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63868-8
Fig. 1. The characterization results of different samples. (a) XRD patterns of WO3 and WO3?x; (b) HRTEM images of WO3?x; (c) Intensity profiles along the arrows in b and the corresponding elemental mapping of W and O of WO3?x; (d) ESR spectra; (e) O 1s XPS spectra; (f) Raman spectra of WO3 and WO3?x.
Fig. 2. (a) UV-Vis-IR DRS spectra of WO3 and WO3-x. (b) Temperature-time variation curve under UV-Vis-IR irradiation; Photothermal images after 5 min of UV-Vis-IR irradiation: blank (c), WO3 (d), and WO3-x (e).
Fig. 3. Light-induced catalytic performance of WO3 and WO3-x; (a) CO, (b) CH4, (c) C2H4, and (d) C2H6 generation; (e) Comparison between the hydrocarbon fuel production rates over WO3-x under UV-Vis, IR, and UV-Vis-IR irradiation, and 73, 106, and 177 °C; (f) On-line gas chromatography mass spectrum of the WO3-x catalyzed CO2 reduction under UV-Vis-IR light irradiation.
Fig. 4. CO2 adsorption (a) and TPD (b) of WO3 and WO3-x; Photocurrent responses (c), electrochemical impedance spectra (d), PL spectra (e), and time-resolved PL spectra (f) of WO3 and WO3-x.
Fig. 5. In-situ FTIR spectra indicating the adsorption and activation of CO2 in the presence of H2O on WO3-x between 1000 and 1800 cm-1 (a) and 2900 and 3400 cm-1 (b). Differential charge density diagrams (0.04 electrons/Å3) of C1 adsorbed on the material surface: (c) CO2 adsorbed on WO3, (d) CO adsorbed on WO3, (e) CO2 adsorbed on WO3-x, and (f) CO adsorbed on WO3-x. Differential charge density diagrams (0.003 electrons/Å3) of C2 adsorbed on the material surface: (g) CH3 + CH3 adsorbed on WO3, (h) CH2 + CH2 adsorbed on WO3, (i) CH3 + CH3 adsorbed on WO3-x, (j) and CH2 + CH2 adsorbed on WO3-x.
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