title: Combinatorial search for improved metal oxide oxygen evolution electrocatalysts in acidic electrolytes.
abstract: A library of electrocatalysts for water electrolysis under acidic conditions was created by ink jet printing metal oxide precursors followed by pyrolysis in air to produce mixed metal oxides. The compositions were then screened in acidic electrolytes using a pH sensitive fluorescence indicator that became fluorescent due to the pH change at the electrode surface because of the release of protons from water oxidation. The most promising materials were further characterized by measuring polarization curves and Tafel slopes as anodes for water oxidation. Mixed metal oxides that perform better than the iridium oxide standard were identified.
authors.affiliation: Department of Chemistry and School of Energy Resources,  University of Wyoming , Laramie, Wyoming 82071, United States.
authors.forename: David
authors.initials: D
authors.lastname: Seley
authors.forename: Katherine
authors.initials: K
authors.lastname: Ayers
authors.forename: B A
authors.initials: BA
authors.lastname: Parkinson
mesh_terms: D002384:Catalysis; D020650:Combinatorial Chemistry Techniques; D055664:Electrochemical Techniques; D004573:Electrolytes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008670:Metals / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D004573:Electrolytes; D008670:Metals; D010087:Oxides; D014867:Water; D010100:Oxygen