Understanding the Influence of Cation Doping on the Surface Chemistry of NaTaO3 from First Principles

Zhen Kun Tang, Cristiana Di Valentin, Xunhua Zhao, Li Min Liu, Annabella Selloni

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Sodium tantalate, NaTaO3, has attracted interest as one of the few photocatalysts capable to perform overall water splitting, that is, simultaneously produce oxygen and hydrogen from water. In particular, an interesting and not fully understood observation is that the efficiency of NaTaO3 increases dramatically in the presence of cation doping. To obtain better insight into the origin of this effect, we use first-principles calculations to investigate the fundamental structural, electronical, and chemical properties of pristine and Sr-doped NaTaO3, a system for which several experimental studies have recently become available. Our results show that Sr donor-acceptor codoping at Na and Ta sites significantly reduces the formation energy of the Sr dopants. Further study of the energetics of the oxygen evolution reaction (OER) shows a substantial reduction of the OER overpotential for the codoped material, consistent with recent suggestions that codoping is crucial for increasing NaTaO3's efficiency. The detailed insights provided by our work could benefit the design and preparation of new efficient catalysts based on NaTaO3

Original languageEnglish (US)
Pages (from-to)10528-10535
Number of pages8
JournalACS Catalysis
Volume9
Issue number11
DOIs
StatePublished - Nov 1 2019

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Keywords

  • density functional theory
  • doping
  • oxygen evolution reaction
  • perovskite oxides
  • surface structure

Fingerprint Dive into the research topics of 'Understanding the Influence of Cation Doping on the Surface Chemistry of NaTaO<sub>3</sub> from First Principles'. Together they form a unique fingerprint.

  • Cite this