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Tuning Decarboxylation Selectivity for Deoxygenation of Vegetable Oil over Pt-Ni Bimetal Catalysts via Surface Engineering

Abstract

Alloy and bimetals structures are particularly important in developing highly active catalysts for the energy conversion. Herein, the Pt-skin (Ni-Pt/Al2O3), Ni-skin (Pt-Ni/Al2O3) and NiPt-skin (NiPt/Al2O3) catalysts were designed and synthesized by the sequential impregnation of Pt and Ni on the Al2O3. The surface structures of these catalysts were confirmed by Cyclic Voltammetry (CV), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), N2 adsorption and desorption isotherms (N2-BET) and H2 temperature programmed reduction (H2-TPR) characterizations. The Pt electronic states were tuned by the sub-layer of Ni on the catalyst’s surface that was the key factor to the decarboxylation. The NiPt alloy species was formed in the Ni-Pt/Al2O3 and NiPt/Al2O3 catalysts, and these two catalysts contained higher content of Pt4+ species compared with the Pt-Ni/Al2O3 catalyst. The NiPt-skin catalyst (NiPt/Al2O3) showed the highest catalytic activity for decarboxylation (62%), meanwhile the Ni-skin catalyst had the highest decarbonylation selectivity (58 %).

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Publication details

The article was received on 30 Nov 2017, accepted on 10 Jan 2018 and first published on 11 Jan 2018


Article type: Paper
DOI: 10.1039/C7CY02440A
Citation: Catal. Sci. Technol., 2018, Accepted Manuscript
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    Tuning Decarboxylation Selectivity for Deoxygenation of Vegetable Oil over Pt-Ni Bimetal Catalysts via Surface Engineering

    H. Chen, X. Zhang, J. Zhang and Q. Wang, Catal. Sci. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C7CY02440A

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