Electronic-State Manipulation of Surface Titanium Activates Dephosphorylation over TiO2 Near Room Temperature

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xianfeng Yi
  • Yao Xiao
  • Anmin Zheng
  • Jian Lin Chen

Detail(s)

Original languageEnglish
Pages (from-to)16149-16155
Journal / PublicationAngewandte Chemie: International Edition in English
Volume60
Issue number29
Online published12 May 2021
Publication statusPublished - 12 Jul 2021

Abstract

Dephosphorylation that removes a phosphate group from substrates is an important reaction for not only living organisms but also environmental protection. Although CeO2 has been shown to catalyze this reaction, as one of the rare earth elements, cerium is low in natural abundance and has a narrow global distribution (> 90% of these reserves are located within six countries). It is thus imperative to find another element/material with high worldwide abundance that can also efficiently extract the phosphate out of agricultural wastes for phosphorus recycle. Using para-nitrophenyl phosphate (p-NPP) as the model compound, we demonstrate herein that TiO2 with F-modified (001) surface can activate p-NPP dephosphorylation at temperature as low as 40 °C. By probe-assisted nuclear magnetic resonance (NMR), it was revealed that the strong electron withdrawing effect of fluorine makes Ti atoms (i.e., the active sites) on (001) surface very acidic. The bidentate adsorption of p-NPP on this surface further promotes its subsequent activation with barrier ~20 kJ/mol lower than that of pristine (001) and (101) surfaces, allowing the activation of this reaction at nearly room temperature (from > 80 °C).

Research Area(s)

  • Electronic state manipulation, Dephosphorylation, Titanium dioxide, Surface characterization, Nuclear magnetic resonance

Citation Format(s)

Electronic-State Manipulation of Surface Titanium Activates Dephosphorylation over TiO2 Near Room Temperature. / Wang, Quan; Yi, Xianfeng; Chen, Yu-Cheng; Xiao, Yao; Zheng, Anmin; Chen, Jian Lin; Peng, Yung-Kang.

In: Angewandte Chemie: International Edition in English, Vol. 60, No. 29, 12.07.2021, p. 16149-16155.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review