Non-redox doping boosts oxygen evolution electrocatalysis on hematite.

ABSTRACT: The oxygen evolution reaction (OER) is the major bottleneck to develop viable and cost-effective water electrolysis, a key process in the production of renewable fuels. Hematite, all iron α-Fe₂O₃, would be an ideal OER catalyst in alkaline media due to its abundance and easy processing. Despite its promising theoretical potential, it has demonstrated very poor OER activity under multiple experimental conditions, significantly worse than that of Co or Ni-based oxides. In the search for improving hematite performance, we have analysed the effect of doping with redox vs. non-redox active species (Ni or Zn). Our results indicate that Zn doping clearly outperforms Ni, commonly accepted as a preferred dopant. Zn-doped hematite exhibits catalytic performances close to

SUBMITTER: Nguyen HC 

PROVIDER: S-EPMC8157419 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature