Chinese Journal of Catalysis ›› 2025, Vol. 71: 308-318.DOI: 10.1016/S1872-2067(24)60272-X
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Meng Liua, Caixia Miaoa, Yumeng Foa, Wenxuan Wangb, Yao Ningc, Shengqi Chud, Weiyu Songa, Ying Zhangc, Jian Liub, Zhijie Wua,*(), Wenhao Luob,*(
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Received:
2025-01-16
Accepted:
2025-03-14
Online:
2025-04-18
Published:
2025-04-13
Contact:
* E-mail: Supported by:
Meng Liu, Caixia Miao, Yumeng Fo, Wenxuan Wang, Yao Ning, Shengqi Chu, Weiyu Song, Ying Zhang, Jian Liu, Zhijie Wu, Wenhao Luo. Chelating-agent-free incorporation of isolated Ni single-atoms within BEA zeolite for enhanced biomass hydrogenation[J]. Chinese Journal of Catalysis, 2025, 71: 308-318.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(24)60272-X
Fig. 1. Electron microscopy analyses of the Ni1@Beta. (a) Low magnification STEM image. (b,c) High magnification STEM images. (d) Elemental mappings for Si, Al and Ni. AC-HAADF-STEM image (e) and its magnified AC-HAADF-STEM images (f) of selected regions. Isolated Ni atoms are marked in white circles.
Fig. 2. Structure of Ni1@Beta. Ni K-edge XANES spectra (a) and FT magnitude of the k2-weighted EXAFS in R space (b) for Ni1@Beta and Ni/Beta catalysts with comparison to a Ni foil and a NiO reference. (c) 6-MR motifs found in BEA zeolite. (d) Different configurations of Al sites in A1 ring. (e) The distances between the Ni atom and the first coordinated O atoms. (f) Electron charge density difference plot of Ni1@Beta with the most stable structure. Yellow and green colors indicate the accumulation and depletion of electron density, respectively.
Fig. 3. Catalytic performance and recyclability of Ni1@Beta and Ni/Beta. (a) Typical reaction networks for furfural hydrogenation. (b) Catalytic hydrogenation of furfural with different catalysts. a Reaction conditions: 0.3 g FF, 23.56 g isopropanol, 0.3 g catalyst, 10 bar H2, 110 °C, 1 h, 1000 r min-1. b Reaction conditions: 0.3 g FF, 23.56 g isopropanol, 0.3 g catalyst, 10 bar H2, 110 °C, 2 h, 1000 r min-1. (c) Literature survey of Ni-based heterogeneous catalysts for furfural hydrogenation [21,22,40????-45]. (d) Recyclability of Ni1@Beta in the selective hydrogenation of furfural. Reaction conditions: 0.3 g FF, 23.56 g isopropanol, 0.1 g catalyst, 10 bar H2, 110 °C, 1 h, 1000 r min-1. (e) Recyclability of Ni/Beta in the selective hydrogenation of furfural. Reaction conditions: 0.3 g FF, 23.56 g isopropanol, 0.4 g catalyst, 10 bar H2, 110 °C, 1 h, 1000 r min-1.
Fig. 4. Characterization of Ni1@Beta and Ni/Beta. H2-TPR profiles (a) and Ni 2p XPS spectra (b) of Ni/Beta and Ni1@Beta. FT-IR spectra of CO adsorbed at low temperature (-170 °C) on Ni1@Beta (c) and Ni/Beta (d).
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