Chemistry-controlled structural relaxation and enhanced redox abilities in vanadium-doped two-dimensional semiconductive TeMo5o16 catalyst

Yihan Zhu, Xue Dong, Weimin Lu*, Yang Wang, Han Li, Guanglie Lv

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Structure relaxation of monoclinic TeMo5O16 catalyst that exhibits two-dimensional semiconductive character has been controlled by ultralow doping content of vanadium. Its roles in changing the redox abilities of the catalysts are first studied via experimental and theoretical methods. Strong O-MoO bond alteration occurs along the b direction both in bulk and on the surface. Meanwhile, the Mo-Mo distances and Mo-O-Mo angles are continuously changed as the degree of structural relaxation increases. As a result, the electron coupling and oxygen covalent bonding are remarkably weakened in the Mo4O18 unit. The redistribution of Mo 4d electrons in the Mo4O18 unit forms the (Mo5+-O-Mo 5+)/(Mo6+-O-Mo6+) redox sites as electron donor acceptor and oxygen reservior. The presence of such redox sites is proved to sharply enhance the redox abilities of the catalysts by surface probe reactions.

Original languageEnglish (US)
Pages (from-to)13277-13286
Number of pages10
JournalJournal of Physical Chemistry C
Volume114
Issue number31
DOIs
StatePublished - Aug 12 2010
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Chemistry-controlled structural relaxation and enhanced redox abilities in vanadium-doped two-dimensional semiconductive TeMo<sub>5</sub>o<sub>16</sub> catalyst'. Together they form a unique fingerprint.

Cite this