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Ni1–xFexOOH thin films prepared via cathodic electrodeposition have been demonstrated to be highly active catalysts for the oxygen evolution reaction (OER) in basic media. Integration of these catalysts with light-absorbing semiconductors is required for photoelectrochemical fuel generation. However, the application of cathodic potentials required for typical electrochemical catalyst deposition limits the library of compatible photoanode materials. Sputter deposition of catalysts circumvents this limitation by enabling facile catalyst layering without cathodic potentials. In this work, we compare the structure and OER activity of sputter-deposited and electrodeposited Ni1–xFexOOH thin films. Electrochemical cycling converts sputtered Ni1–xFex metallic films to the desired oxides/(oxy)hydroxides. Both film preparation methods give catalysts with similar electrochemical behavior across all compositions. Additionally, OER activity is comparable between the deposition methods, with maximum activity for films ...

Role of Catalyst Preparation on the Electrocatalytic Activity of Ni1–xFexOOH for the Oxygen Evolution Reaction

Role of Catalyst Preparation on the Electrocatalytic Activity of Ni_1–xFe_xOOH for the Oxygen Evolution Reaction