Tuning proton-coupled electron transfer by crystal orientation for efficient water oxidization on double perovskite oxides.

ABSTRACT: Developing highly efficient and cost-effective oxygen evolution reaction (OER) electrocatalysts is critical for many energy devices. While regulating the proton-coupled electron transfer (PCET) process via introducing additive into the system has been reported effective in promoting OER activity, controlling the PCET process by tuning the intrinsic material properties remains a challenging task. In this work, we take double perovskite oxide PrBa_0.5Sr_0.5Co_1.5Fe_0.5O_5+δ (PBSCF) as a model system to demonstrate enhancing OER activity through the promotion of PCET by tuning the crystal orientation and correlated proton diffusion. OER kinetics on PBSCF thin films with (100), (110), and (111) orientation, deposited on single crystal LaAlO

SUBMITTER: Zhu Y 

PROVIDER: S-EPMC7453016 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature