title: Revised Oxygen Evolution Reaction Activity Trends for First-Row Transition-Metal (Oxy)hydroxides in Alkaline Media.
abstract: First-row transition-metal oxides and (oxy)hydroxides catalyze the oxygen evolution reaction (OER) in alkaline media. Understanding the intrinsic catalytic activity provides insight into improved catalyst design. Experimental and computationally predicted activity trends, however, have varied substantially. Here we describe a new OER activity trend for nominally oxyhydroxide thin films of Ni(Fe)O(x)H(y) > Co(Fe)O(x)H(y) > FeO(x)H(y)-AuO(x) > FeO(x)H(y) > CoO(x)H(y) > NiO(x)H(y) > MnO(x)H(y). This intrinsic trend has been previously obscured by electrolyte impurities, potential-dependent electrical conductivity, and difficulty in correcting for surface-area or mass-loading differences. A quartz-crystal microbalance was used to monitor mass in situ and X-ray photoelectron spectroscopy to measure composition and impurity levels. These new results provide a basis for comparison to theory and help guide the design of improved catalyst systems.
authors.affiliation: Department of Chemistry and Biochemistry, 1253 University of Oregon, Eugene, Oregon 97403, United States.
authors.forename: Michaela S
authors.initials: MS
authors.lastname: Burke
authors.affiliation: Department of Chemistry and Biochemistry, 1253 University of Oregon, Eugene, Oregon 97403, United States.|Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University , Hangzhou, 310027, China.
authors.forename: Shihui
authors.initials: S
authors.lastname: Zou
authors.affiliation: Department of Chemistry and Biochemistry, 1253 University of Oregon, Eugene, Oregon 97403, United States.
authors.forename: Lisa J
authors.initials: LJ
authors.lastname: Enman
authors.affiliation: Department of Chemistry and Biochemistry, 1253 University of Oregon, Eugene, Oregon 97403, United States.
authors.forename: Jaclyn E
authors.initials: JE
authors.lastname: Kellon
authors.affiliation: Department of Chemistry and Biochemistry, 1253 University of Oregon, Eugene, Oregon 97403, United States.
authors.forename: Christian A
authors.initials: CA
authors.lastname: Gabor
authors.affiliation: Department of Chemistry and Biochemistry, 1253 University of Oregon, Eugene, Oregon 97403, United States.
authors.forename: Erica
authors.initials: E
authors.lastname: Pledger
authors.affiliation: Department of Chemistry and Biochemistry, 1253 University of Oregon, Eugene, Oregon 97403, United States.
authors.forename: Shannon W
authors.initials: SW
authors.lastname: Boettcher