Issue 11, 2022

Oxide-ion conductivity optimization in BiVO4 scheelite by an acceptor doping strategy

Abstract

BiVO4 scheelite is one of the few tetrahedra-based structures able to display vacancy-mediated oxide-ion conduction upon the use of an acceptor-doping strategy, leading to oxide-ion migration. In order to modulate the ionic migration process, it is of utmost importance to understand the different parameters affecting it. Here we review phase formation, oxygen vacancy stabilization, and migration for a wide variety of acceptor metal dopants in scheelite BiVO4. Among them, Ca2+-doped materials present the widest solid-solution range, leading to optimized oxide-ion conductivities at moderately high temperatures (σb: ∼10−3 S cm−1 at 500 °C), mainly as a result of their smaller size mismatch with Bi3+ and lower oxygen vacancy defect energy. The results gathered herein provide a useful guide for designing new oxide-ion conductors and tailoring oxide conductivity through the proper selection of doping agents according to several criteria, such as the oxygen defect formation energy, atom size mismatch, polarizability, and bond-dissociation energy with oxygen.

Graphical abstract: Oxide-ion conductivity optimization in BiVO4 scheelite by an acceptor doping strategy

Supplementary files

Article information

Article type
Research Article
Submitted
10 Feb 2022
Accepted
08 Apr 2022
First published
13 Apr 2022

Inorg. Chem. Front., 2022,9, 2644-2658

Oxide-ion conductivity optimization in BiVO4 scheelite by an acceptor doping strategy

X. Yang, X. Zeng, X. Ming, L. Yang, A. J. Fernández-Carrión, S. Deng, L. He and X. Kuang, Inorg. Chem. Front., 2022, 9, 2644 DOI: 10.1039/D2QI00314G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements