Preparation and bifunctional properties of the A-site-deficient SrTi0.3Fe0.6Ni0.1O3- δ perovskite

Na Xu; Jiyuan Zhang; Shaohui Su; Jingdong Feng; Zhanlin Xu

doi:10.1039/d2ra07014f

Preparation and bifunctional properties of the A-site-deficient SrTi_0.3Fe_0.6Ni_0.1O_{3- δ} perovskite

RSC Adv. 2022 Nov 25;12(52):33789-33800. doi: 10.1039/d2ra07014f. eCollection 2022 Nov 22.

Authors

Na Xu^{1

2}, Jiyuan Zhang^{1

2}, Shaohui Su^{1

2}, Jingdong Feng², Zhanlin Xu²

Affiliations

¹ Key Laboratory of Preparation and Applications of Environmental Friendly Materials of the Ministry of Education, Jilin Normal University Changchun 130103 China.
² Department of Chemistry, Jilin Normal University Siping 136000 China xuzhanlin1964@163.com tougaozzz@126.com.

Abstract

The development of efficient, non-noble metal electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial for their application in energy storage devices, such as fuel cells and metal-air batteries. In this study, SrTi_0.3Fe_0.6Ni_0.1O_3-δ (STFN) perovskite was synthesized using the sol-gel method, and its electrocatalytic activity was evaluated using a rotating disk electrode (RDE) in an alkaline medium. STFN synthesized at the optimum synthesis temperature of 800 °C exhibited good ORR and OER performances. To further improve electrocatalytic activity, a series of Sr_1-x Ti_0.3Fe_0.6Ni_0.1O_3-δ (x = 0, 0.05, and 0.1) perovskites with A-site vacancies were synthesized at 800 °C. Material characterization results showed that the removal of the A-site from the perovskite led to an increase in surface oxygen vacancies, resulting in higher ORR and OER activities. The results of this study indicate that Sr_1-x Ti_0.3Fe_0.6Ni_0.1O_3-δ (x = 0.1) is a promising bifunctional oxygen electrocatalyst for Zn-air batteries.