P-type cobaltite oxide spinels enable efficient electrocatalytic oxygen evolution reaction.

ABSTRACT: Currently, energy-efficient electrocatalytic oxygen evolution from water involves the use of noble metal oxides. Here, we show that highly p-conducting zinc cobaltite spinel Zn_1.2Co_1.8O_3.5 offers an enhanced electrocatalytic activity for oxygen evolution. We refer to previous studies on sputtered Zn-Co spinels with optimized conductivity for implementation as (p-type) transparent conducting oxides. Based on that, we manufacture off-stoichiometric conducting p-spinel catalytic anodes on tetragonal Ti, Au-Ti and hexagonal Al-doped ZnO carriers and report the evolution of O₂ at Tafel slopes between 40.5 and 48 mV dec^-1 and at overpotentials between 0.35 and 0.43 V (at 10 mA cm^-2). The anodic stability, i.e., 50 h of cont

SUBMITTER: Doppelbauer D 

PROVIDER: S-EPMC8366392 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature