Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (10): 1677-1688.DOI: 10.1016/S1872-2067(21)63791-9
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Linhe Zhanga, Fudong Zhangb, Huaqing Xueb, Jianfeng Gaoa, Yong Pengb, Weiyu Songc, Lei Gea()
Received:
2021-02-06
Accepted:
2021-03-01
Online:
2021-06-20
Published:
2021-06-20
Contact:
Lei Ge
About author:
Professor Lei Ge received his B.S. in 2002 and Ph.D degree in 2006 from Tianjin University. At the end of 2006, he joined the faculty of Department of Materials Science and Engineering, China University of Petroleum Beijing. From 2011 to 2012, he did postdoctoral research at The University of California at Riverside. His research interests currently focus on new materials and energy photocatalysis, electrocatalysis with emphasis on design of new catalysts and control of morphology, microstructure and reaction mechanism for hydrogen production, environmental pollutants degradation, etc. Some of his recent progresses include the novel approaches to design cocatalysts decorated photocatalysts with controllable microstructures, the synthesis of novel hollow structured materials with superior catalytic performance, preparation of metal and nonmetal ions doped electrocatalysts derived from MOFs with high overwall water splitting performance. He has coauthored more than 100 peer-reviewed papers and 10 patents. He joined the Editorial Board of Chin. J Catal. as a young member in 2020.
Supported by:
Linhe Zhang, Fudong Zhang, Huaqing Xue, Jianfeng Gao, Yong Peng, Weiyu Song, Lei Ge. Mechanism investigation of PtPd decorated Zn0.5Cd0.5S nanorods with efficient photocatalytic hydrogen production combining with kinetics and thermodynamics[J]. Chinese Journal of Catalysis, 2021, 42(10): 1677-1688.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63791-9
Fig. 2. TEM patterns of ZCS (a,b) and PtPd/ZCS composite (c); (d,e) HRTEM image of PtPd/ZCS sample; (f) Mapping of elements (Zn, Cd, S, Pt, Pd) in sample of PtPd/ZCS.
Sample | Atomic ratios | |||||
---|---|---|---|---|---|---|
S | Zn | Cd | Pd | Pt | ||
ZCS | 0.71 | 0.36 | 0.36 | — | — | |
1%PtPd/ZCS | 0.71 | 0.37 | 0.37 | 0.0036 | 0.0008 |
Table 1 ICP-OES experimental data for pure ZCS and 1 wt% PtPd/ZCS.
Sample | Atomic ratios | |||||
---|---|---|---|---|---|---|
S | Zn | Cd | Pd | Pt | ||
ZCS | 0.71 | 0.36 | 0.36 | — | — | |
1%PtPd/ZCS | 0.71 | 0.37 | 0.37 | 0.0036 | 0.0008 |
Fig. 4. (a) UV-vis DRS spectra of pure ZCS and PtPd/ZCS composites with different weight ratios of PtPd alloy NPs; (b) Mott-Schottky plots of ZCS in 0.5 M Na2SO4 solution; (c) TRPL spectra of pure ZCS and PtPd/ZCS samples.
Fig. 5. (a) The H2 production rate of ZCS and PtPd/ZCS; (b) The H2 production rate of 1 wt% Pt1-xPdx/ZCS composite samples; (c) The apparent quantum yield of 1 wt% PtPd/ZCS photocatalyst under 420 nm light irradiation; (d) Cycling runs of the photocatalytic H2 evolution for 1 wt% PtPd/ZCS photocatalyst.
Fig. 7. The calculation model for pure ZCS (a), PtPd alloy (b) and PtPd/ZCS composite (c); The d-band center properties of the alloys, pure metals (d) and Pt/ZCS, Pd/ZCS, PtPd/ZCS composites (e) from DFT calculations; (f) the calculated free energy diagram of HER at equilibrium potential of ZCS, Pt/ZCS, Pd/ZCS and PtPd/ZCS.
Fig. 8. Photoluminescence (PL) emission spectra under excitation at 270 nm (a), Photocurrent responses (b). EIS plots (c), and SPV spectra (d) of ZCS, Pt/ZCS, Pd/ZCS and PtPd/ZCS.
Scheme 2. (a) Schematic diagram of charge transfer and separation in PtPd/ZCS; (b) Proposed mechanism of photocatalytic H2 production under visible light irradiation on PtPd/ZCS.
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