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- W3190351346 abstract "The use of nanoscale heterostructures is an effective approach for developing catalysts that are free of precious metals for sustainable energy conversion. In this study, a sequenced successive ionic layer adsorption and reaction (sequenced-SILAR) method was developed for the fabrication of Ni(OH)2/FeOOH heterostructures. In this method, the order of the deposition cycles of individual Ni(OH)2 and FeOOH layers was programmed to control the thickness and stacking order of these layers in the heterostructure. The sequenced-SILAR process using an Fe2+ solution as the iron source produced dense heterojunctions offering overpotentials of 330 and 234 mV at 10 mA cm–2 for an oxygen evolution reaction (OER) on a flat, conducting oxide substrate and porous Ni foam, respectively. Investigation of the deposition-sequence-dependent OER activity indicated that the Ni(OH)2/FeOOH coupling effects may extend to the Ni2+ active sites located about 10 nm from the heterointerface. When an Fe3+ precursor was employed in the sequenced-SILAR process, dense heterojunctions were not produced because of the formation of isolated FeOOH particles. As a result, an excellent overpotential was not obtained. In principle, the sequenced-SILAR method can be extended to the fabrication of various types of heterostructures. However, the deposition conditions must be carefully designed to offer strong interfacial coupling effects." @default.
- W3190351346 created "2021-08-16" @default.
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- W3190351346 date "2021-08-09" @default.
- W3190351346 modified "2023-09-26" @default.
- W3190351346 title "Sequenced Successive Ionic Layer Adsorption and Reaction for Rational Design of Ni(OH)<sub>2</sub>/FeOOH Heterostructures with Tailored Catalytic Properties" @default.
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- W3190351346 doi "https://doi.org/10.1021/acsaem.1c01505" @default.
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