Efficient and sustainable water electrolysis achieved by excess electron reservoir enabling charge replenishment to catalysts.

ABSTRACT: Suppressing the oxidation of active-Ir(III) in IrO_x catalysts is highly desirable to realize an efficient and durable oxygen evolution reaction in water electrolysis. Although charge replenishment from supports can be effective in preventing the oxidation of IrO_x catalysts, most supports have inherently limited charge transfer capability. Here, we demonstrate that an excess electron reservoir, which is a charged oxygen species, incorporated in antimony-doped tin oxide supports can effectively control the Ir oxidation states by boosting the charge donations to IrO_x catalysts. Both computational and experimental analyses reveal that the promoted charge transfer driven by excess electron reservoir is the key parameter for stabilizing the active-Ir(III) in IrO<

SUBMITTER: Lee GR 

PROVIDER: S-EPMC10480199 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature