Utilizing ion leaching effects for achieving high oxygen-evolving performance on hybrid nanocomposite with self-optimized behaviors.

ABSTRACT: Ion leaching from pure-phase oxygen-evolving electrocatalysts generally exists, leading to the collapse and loss of catalyst crystalline matrix. Here, different from previous design methodologies of pure-phase perovskites, we introduce soluble BaCl₂ and SrCl₂ into perovskites through a self-assembly process aimed at simultaneously tuning dual cation/anion leaching effects and optimizing ion match in perovskites to protect the crystalline matrix. As a proof-of-concept, self-assembled hybrid Ba_0.35Sr_0.65Co_0.8Fe_0.2O_3-δ (BSCF) nanocomposite (with BaCl₂ and SrCl₂) exhibits the low overpotential of 260 mV at 10 mA cm^-2 in 0.1 M KOH. Multiple operando spectroscopic techniques reveal that

SUBMITTER: Guan D 

PROVIDER: S-EPMC7338502 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature