Tuning the decarboxylation selectivity for deoxygenation of vegetable oil over Pt–Ni bimetal catalysts via surface engineering. Issue 4 (23rd January 2018)

• Record Type: Journal Article
• Authors: Chen, Hao; Zhang, Xiangwen; Zhang, Junfeng; Wang, Qingfa
• Is Part Of: Catalysis science & technology. Volume 8:Issue 4(2018)
• Page Start: 1126
• Page End: 1133
• Publication Date: 2018-01-23
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/c7cy02440a
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : Alloy and bimetal structures are particularly important in developing highly active catalysts for energy conversion. Abstract : Alloy and bimetal structures are particularly important in developing highly active catalysts for energy conversion. Herein, Pt-skin (Ni–Pt/Al2 O3 ), Ni-skin (Pt–Ni/Al2 O3 ) and NiPt-skin (NiPt/Al2 O3 ) catalysts were designed and synthesized by sequential impregnation of Pt and Ni on Al2 O3 . 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 isotherm measurement (N2 -BET) and H2 temperature programmed reduction (H2 -TPR). The Pt electronic states were tuned by the sub-layer of Ni on the catalyst's surface which was the key factor to decarboxylation. The NiPt alloy species was formed in the Ni–Pt/Al2 O3 and NiPt/Al2 O3 catalysts, and these two catalysts contained a higher content of Pt 4+ species compared with the Pt–Ni/Al2 O3 catalyst. The NiPt-skin catalyst (NiPt/Al2 O3 ) showed the highest catalytic activity for decarboxylation (62%), while the Ni-skin catalyst had the highest decarbonylation selectivity (58%).