NiCu anchored on a specific TiO2 face tunes electron density for selective hydrogenation of fatty acids into alkanes or alcohols
Long, Feng and Cao, Xincheng and Jiang, Xia and Liu, Peng and Jiang, JianChun and Zhang, Xiaolei and Xu, Junming (2022) NiCu anchored on a specific TiO2 face tunes electron density for selective hydrogenation of fatty acids into alkanes or alcohols. ACS Sustainable Chemistry and Engineering, 10 (22). pp. 7349-7361. ISSN 2168-0485 (https://doi.org/10.1021/acssuschemeng.2c01134)
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Abstract
Catalyst design is critical for renewable selective hydrogenation of fatty acids into alkanes or alcohols, especially for active metals and supports. We demonstrate that NiCu anchored on a TiO2 (P25) surface, prepared by the impregnation method, performed superior temperature-sensitive catalytic activities with a higher fatty alcohol yield of 78.2% (205 °C, 4 MPa H2, and 12 h) and alkane yield of 85.0% (245 °C, 3 MPa H2, and 6 h). X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) suggest that Ni or NiCu anchored on rutile with oxygen vacancies can achieve reversal of charge transfer between the metal and TiO2 support. Especially, the normal NiCu cluster loading on the rutile surface can improve the dispersion of the NiCu cluster and oxygen vacancy concentration. Thus, more NiCu clusters anchored on oxygen defects can obtain negative charges in favor of alcohol production. In contrast, the other active NiCu clusters will preferentially cleave the C–C bond to produce alkanes at a higher reaction temperature. Our work provides a new strategy for designing highly effective hydrogenation catalysts.
ORCID iDs
Long, Feng, Cao, Xincheng, Jiang, Xia, Liu, Peng, Jiang, JianChun, Zhang, Xiaolei ORCID: https://orcid.org/0000-0001-9415-3136 and Xu, Junming;-
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Item type: Article ID code: 81210 Dates: DateEvent6 June 2022Published25 May 2022Published Online24 May 2022AcceptedSubjects: Technology > Chemical engineering
Technology > Engineering (General). Civil engineering (General) > BioengineeringDepartment: Faculty of Engineering > Chemical and Process Engineering Depositing user: Pure Administrator Date deposited: 21 Jun 2022 10:44 Last modified: 12 Sep 2024 01:36 URI: https://strathprints.strath.ac.uk/id/eprint/81210