@article{d44b51f0843f4ff9b45193ca238a836d,
title = "Structure–Activity Correlations for Br{\o}nsted Acid, Lewis Acid, and Photocatalyzed Reactions of Exfoliated Crystalline Niobium Oxides",
abstract = "Exfoliated crystalline niobium oxides that contain exposed but interconnected NbO6 octahedra with different degrees of structural distortion and defects are known to catalyze Br{\o}nsted acid (BA), Lewis acid (LA), and photocatalytic (PC) reactions efficiently but their structure–activity relationships are far from clear. Here, three exfoliated niobium oxides, namely, HSr2Nb3O10, HCa2Nb3O10, and HNb3O8, are synthesized, characterized extensively, and tested for selected BA, LA, and PC reactions. The structural origin for BA is associated mainly with acidic hydroxyl groups of edge-shared NbO6 octahedra as proton donors; that of LA is associated with the vacant band position of Nb5+ to receive electron pairs from substrate; and that of PC is associated with the terminal Nb=O of NbO6 octahedra for photon capture and charge transfer to long-lived surface adsorbed substrate complex through associated oxygen vacancies in close proximity. It is believed that an understanding of the structure–activity relationships could lead to the tailored design of NbOx catalysts for industrially important reactions.",
keywords = "heterogeneous catalysis, lewis acids, niobium, oxidation, structure–activity relationships",
author = "Yusuke Koito and Rees, {Gregory J.} and Hanna, {John V.} and Li, {Molly M.J.} and Peng, {Yung Kang} and Tim Puchtler and Robert Taylor and Tong Wang and Hisayoshi Kobayashi and Teixeira, {Ivo F.} and Khan, {M. Abdullah} and Kreissl, {Hannah T.} and Tsang, {S. C.Edman}",
note = "Funding Information: We are grateful to the EPSRC for supporting the work at the University of Oxford. Y.K. would like to acknowledge postdoctoral funding from the Uehara Memorial Foundation Research Fellowship to enable him to work at Oxford. J.V.H. thanks the University of Warwick, the EPSRC, and the Birmingham Science City for access to the 14.1 T solid state MAS NMR instrumentation used in this research. The latter was funding obtained through the Birmingham Science City Advanced Materials Project 1: Creating and Characterising Next generation Advanced Materials project, with support from Advantage West Midlands (AWM) and the European Regional Development Fund (ERDF). In addition, J.V.H. acknowledges the UK 850 MHz Solid State NMR National Facility also used in this research which was funded by the EPSRC, BBSRC (contract reference PR140003), and the University of Warwick, which included partial funding through Birmingham Science City Advanced Materials Projects 1 and 2 supported by Advantage West Midlands (AWM) and the European Regional Development Fund (ERDF). Collaborative assistance from the UK 850 MHz Facility Manager (Dinu Iuga, University of Warwick) is also acknowledged. Publisher Copyright: {\textcopyright} 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",
year = "2017",
month = jan,
day = "9",
doi = "10.1002/cctc.201601131",
language = "English",
volume = "9",
pages = "144--154",
journal = "ChemCatChem",
issn = "1867-3880",
publisher = "Wiley - VCH Verlag GmbH & CO. KGaA",
number = "1",
}