Chinese Journal of Catalysis ›› 2023, Vol. 49: 132-140.DOI: 10.1016/S1872-2067(23)64443-2
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Jiao Wang, Fangfang Zhu, Biyi Chen, Shuang Deng, Bochen Hu, Hong Liu, Meng Wu, Jinhui Hao(), Longhua Li, Weidong Shi(
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Received:
2023-03-15
Accepted:
2023-04-27
Online:
2023-06-18
Published:
2023-06-05
Contact:
*E-mail: Supported by:
Jiao Wang, Fangfang Zhu, Biyi Chen, Shuang Deng, Bochen Hu, Hong Liu, Meng Wu, Jinhui Hao, Longhua Li, Weidong Shi. B atom dopant-manipulate electronic structure of CuIn nanoalloy delivering wide potential activity over electrochemical CO2RR[J]. Chinese Journal of Catalysis, 2023, 49: 132-140.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(23)64443-2
Fig. 1. (a) Schematic synthesis process of CuIn(B), Cu(B), In(B) and CuIn catalysts. Morphology and structure characterizations of CuIn(B). (b) FESEM and the average size distribution; TEM (c), HRTEM (d), HAADF-STEM (e) and EDS diagrams of elements (f?i).
Fig. 3. Electrocatalytic CO2RR performances of CuIn(B). (a) LSV curves tested in 0.5 mol/L KHCO3 solution with saturated Ar or CO2. (b) FE of gas products of CuIn(B). (c) FECO obtained within the scope of -0.5 V to -1.2 V (vs. RHE). (d) jCO obtained at different applied potential. (e) EECO of diverse catalysts. (f) Long-term durability test of CuIn(B) at -0.8 V (vs. RHE). The standard deviation of three separate measurements of the same sample is represented by the error estimates.
Fig. 4. (a) Differences in current density (Δj/2) displayed against scan rates. (b) The surface roughness factor. (c) Nyquist curves. (d) Tafel curves.
Fig. 5. Theoretical calculations on CuIn(B) and CuIn. (a) Calculated free energy diagrams on the CuIn(B) and CuIn. (b) The distinction in thermodynamic limiting potentials for CO2-to-CO conversion and HER on catalysts. (c) The top and side view of charge density difference in CuIn(B), where charge consumption and accumulation were described by cyan and yellow, respectively. (d) PDOS curves of Cu 3d, In 3d, the Cu site adsorbed with *COOH intermediate on the CuIn(B) and CuIn. The dashed orange line manifests the Fermi level (Ef). Dotted grey lines represent the d-band centers (Ed).
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