Pyrochlore-type cobalt and manganese antimonate electrocatalysts with excellent activity and stability for OER in acidic solution

Abstract

Developing robust electrocatalysts for the oxygen evolution reaction (OER) in acidic solutions that exhibit both good activity and stability remains a significant challenge. This study focuses on the pyrochlore-type Co2Sb2O7...

Recent progress and perspective for oxygen evolution reaction under acidic environments

“…In a separate study, Wang et al synthesized a pyrochlore-type Co 2 Sb 2 O 7 (CSO) material with both nanoscale and micrometer-scale structures using the ball-milling and calcination techniques. 145 In 0.5 M H 2 SO 4 , CSO exhibited a low overpotential of 288 mV to achieve an OER current density of 10 mA cm −2 .…”

“…Their structures and compositions can be tailored due to the diverse species and valence states of the A and B cations, enabling the design of a wide range of efficient OER electrocatalysts. In particular, Ir-based perovskite oxides with a reduced noble-metal loading have gained significant attention following the exceptional catalytic performance of IrO x /SrIrO 3 for acidic OER, 145 and numerous Ir-based perovskite oxides with reduced noble-metal loading have been investigated. For example, Diaz-Morales et al reported the preparation of a family of double perovskite oxides, Ba 2 MIrO 6 (M = Y, La, Ce, Pr, Nd and Tb), which contained 32 wt% less iridium than IrO 2 but exhibited more than three-times higher activity in acidic environments.…”