title: Tuning the Accessibility and Activity of Au25(SR)18Nanocluster Catalysts through Ligand Engineering.
abstract: In this work, the effects of thiolate ligands (-SR, e.g., chain length and functional moiety) on the accessibility and catalytic activity of thiolate-protected gold nanoclusters (e.g., Au25(SR)18) for 4-nitrophenol hydrogenation is reported. The data suggest that Au25(SR)18bearing a shorter alkyl chain shows a better accessibility to the substrates (shown by shorter induction time, t0) and a higher catalytic activity (shown by higher apparent reaction rate constant, kapp). The functional moiety of the ligands is another determinant factor, which clearly suggests that ligand engineering of Au25(SR)18would be an efficient platform for fine-tuning its catalytic properties.
authors: Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore.
authors: Jingguo
authors: J
authors: Li
authors: Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore.
authors: Ricca Rahman
authors: RR
authors: Nasaruddin
authors: Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore.|State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
authors: Yan
authors: Y
authors: Feng
authors: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
authors: Jun
authors: J
authors: Yang
authors: Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore. cheyann@nus.edu.sg.
authors: Ning
authors: N
authors: Yan
authors: Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore. chexiej@nus.edu.sg.
authors: Jianping
authors: J
authors: Xie
keywords: cluster catalyst; gold nanoclusters; ligand engineering; nanocatalysis; noble metal nanoclusters