title: Highly active mixed-metal nanosheet water oxidation catalysts made by pulsed-laser ablation in liquids.
abstract: Surfactant-free mixed-metal hydroxide water oxidation nanocatalysts were synthesized by pulsed-laser ablation in liquids. In a series of [Ni-Fe]-layered double hydroxides with intercalated nitrate and water, [Ni1-xFex(OH)2](NO3)y(OH)x-y·nH2O, higher activity was observed as the amount of Fe decreased to 22%. Addition of Ti(4+) and La(3+) ions further enhanced electrocatalysis, with a lowest overpotential of 260 mV at 10 mA cm(-2). Electrocatalytic water oxidation activity increased with the relative proportion of a 405.1 eV N 1s (XPS binding energy) species in the nanosheets.
authors.affiliation: Beckman Institute and Division of Chemistry and Chemical Engineering, California Institute of Technology , M/C 139-74, Pasadena, California 91125, United States.
authors.forename: Bryan M
authors.initials: BM
authors.lastname: Hunter
authors.forename: James D
authors.initials: JD
authors.lastname: Blakemore
authors.forename: Mark
authors.initials: M
authors.lastname: Deimund
authors.forename: Harry B
authors.initials: HB
authors.lastname: Gray
authors.forename: Jay R
authors.initials: JR
authors.lastname: Winkler
authors.forename: Astrid M
authors.initials: AM
authors.lastname: Müller