Solution-Processed Ni-Based Nanocomposite Electrocatalysts: An Approach to Highly Efficient Electrochemical Water Splitting
- Noguera-Gomez, Jaume
- García-Tecedor, Miguel
- Sánchez Royo, Juan Francisco
- Valencia, Luisa M.
- de la Mata, María
- Herrera Collado, Miriam
- Molina, Sergio I.
- Abargues, Rafael
- Gimenez, Sixto
DOIAbstract
In this study, we report an up-scalable and low-cost solution-processed method to in situ synthesize an earth-abundant non-stoichiometric NiOx-based electrocatalytic film for water oxidation. The catalytic activity was found to be inversely proportional to the baking temperature, which varied from 50 to 500 °C. We found the formation of a hybrid nanocomposite thin film of NiOx nanocrystals (<2 nm size) inside an acetate-based organic matrix at low temperatures (<200 °C). The defective and short-range structural order of the NiOx-based nanocomposite electrocatalysts, compatible with lattice stress, low electrical conductivity, and high density of catalytically active surface species, and higher Fe incorporation were responsible for the enhan...
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