An Oxygen Evolution Reaction (OER) catalyst includes a metal oxide that includes oxygen, cerium, and one or more second metals. In some instances, the cerium is 10 to 80 molar % of the metals in the metal oxide and/or the catalyst includes two or more second metals. The OER catalyst can be included in or on an electrode. The electrode can be arranged in an oxygen evolution system such that the Oxygen Evolution Reaction occurs at the electrode.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
This invention was made with government support under grant no. DE-SC0004993 awarded by the US Department of Energy. The government has certain rights in the invention.