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• W2788394753 abstract "In this paper, Ni/Al2O3 catalysts (15 wt% Ni) with different Re loadings were prepared to investigate the effect of Re on the structure and catalytic performance of Ni-Re/Al2O3 catalysts for the reductive amination of monoethanolamine. Reaction results reveal that the conversion and ethylenediamine selectivity increase significantly with increasing Re loading up to 2 wt%. Ni-Re/Al2O3 catalysts show excellent stability during the reductive amination reaction. The characterization of XRD, DR UV-Vis spectroscopy, H2-TPR, and acidity-basicity measurements indicates that addition of Re improves the Ni dispersion, proportion of octahedral Ni2+ species, reducibility, and acid strength for Ni-Re/Al2O3 catalysts. The Ni15 and Ni15-Re2 catalysts were chosen for in-depth study. The results from SEM-BSE, TEM, and CO-TPD indicate that smaller Ni0 particle size and higher Ni0 surface area are obtained in the reduced Ni-Re/Al2O3 catalysts. Results from in situ XPS and STEM-EDX line scan suggest that Re species show a mixture of various valances and have a tendency to aggregate on the surface of Ni0 particles. During reaction, the Ni0 particles on the Al2O3 support are stabilized and the sintering process is effectively suppressed by the incorporation of Re. It could be concluded that sufficient Ni0 sites, the collaborative effect of Ni-Re, and brilliant stability contribute to the excellent catalytic performance of Ni-Re/Al2O3 catalysts for the reductive amination of monoethanolamine." @default.
• W2788394753 created "2018-03-06" @default.
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• W2788394753 date "2018-01-01" @default.
• W2788394753 modified "2023-10-10" @default.
• W2788394753 title "Effect of Re promoter on the structure and catalytic performance of Ni–Re/Al₂O₃ catalysts for the reductive amination of monoethanolamine" @default.
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• W2788394753 doi "https://doi.org/10.1039/c7ra12891f" @default.
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