Design of template-stabilized active and earth-abundant oxygen evolution catalysts in acid.

ABSTRACT: Oxygen evolution reaction (OER) catalysts that are earth-abundant and are active and stable in acid are unknown. Active catalysts derived from Co and Ni oxides dissolve at low pH, whereas acid stable systems such as Mn oxides (MnO _x ) display poor OER activity. We now demonstrate a rational approach for the design of earth-abundant catalysts that are stable and active in acid by treating activity and stability as decoupled elements of mixed metal oxides. Manganese serves as a stabilizing structural element for catalytically active Co centers in CoMnO _x films. In acidic solutions (pH 2.5), CoMnO _x exhibits the OER activity of electrodeposited Co oxide (CoO _x ) with a Tafel slope of 70-80 mV per decade while also retaini

SUBMITTER: Huynh M 

PROVIDER: S-EPMC5637126 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature