Synergistic Modulation at Atomically Dispersed Fe/Au Interface for Selective CO<sub>2</sub> Electroreduction.
basic_science · Level V
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- Record sourced from PubMed, PMID 33305576.
- Also identified by DOI 10.1021/acs.nanolett.0c04291.
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Abstract
The electrocatalytic carbon dioxide reduction reaction (CO<sub>2</sub>RR) offers an attractive route to fuels and feedstocks from renewable energy. Gold is active for the electrochemical CO<sub>2</sub>RR to CO, while the competing hydrogen evolution reaction is unavoidable. Here, we report a synergistic strategy, via introducing atomically dispersed Fe to tune the electronic structure of the Au nanoparticle, to improve the CO selectivity. By using operando X-ray absorption and infrared spectroscopies, we reveal the dynamic structural evolution and the adsorption of reactant intermediates at the single-atom Fe<sub>1</sub>/Au interface. During the reaction, the interaction between Fe and Au atoms becomes stronger, and the Fe<sub>1</sub>/Au synergies affect the adsorption of reaction intermediates, thus improving the selectivity of CO up to 96.3% with a mass activity of 399 mA mg<sup>-1</sup>. These results highlight the significant importance of synergistic modulation for advancing the single-atom decorated nanoparticle catalysis.