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001     842567
005     20210129232357.0
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100 1 _ |a Cui, Chunhua
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245 _ _ |a Atomically dispersed hybrid nickel-iridium sites for photoelectrocatalysis
260 _ _ |a London
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520 _ _ |a Atomically dispersed supported catalysts can maximize atom efficiency and minimize cost. In spite of much progress in gas-phase catalysis, applying such catalysts in the field of renewable energy coupled with electrochemistry remains a challenge due to their limited durability in electrolyte. Here, we report a robust and atomically dispersed hybrid catalyst formed in situ on a hematite semiconductor support during photoelectrochemical oxygen evolution by electrostatic adsorption of soluble monomeric [Ir(OH)6]2− coupled to positively charged NiOx sites. The alkali-stable [Ir(OH)6]2− features synergistically enhanced activity toward water oxidation through NiOx that acts as a “movable bridge” of charge transfer from the hematite surface to the single iridium center. This hybrid catalyst sustains high performance and stability in alkaline electrolyte for >80 h of operation. Our findings provide a promising path for soluble catalysts that are weakly and reversibly bound to semiconductor-supported hole-accumulation inorganic materials under catalytic reaction conditions as hybrid active sites for photoelectrocatalysis.
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700 1 _ |a Heggen, Marc
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700 1 _ |a Zabka, Wolf-Dietrich
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700 1 _ |a Cui, Wei
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700 1 _ |a Osterwalder, Jürg
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700 1 _ |a Probst, Benjamin
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700 1 _ |a Alberto, Roger
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773 _ _ |a 10.1038/s41467-017-01545-w
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