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Li, Junjie; Jiang, Ya-fei; Wang, Qi; Xu, Cong-Qiao; Wu, Duojie; Banis, Mohammad Norouzi; Adair, Keegan R.; Doyle-Davis, Kieran; Meira, Debora Motta; Finfrock, Y. Zou; Li, Weihan; Zhang, Lei; Sham, Tsun-Kong; Li, Ruying; Chen, Ning; Gu, Meng; Li, Jun; Sun, Xueliang
Nature communications, 11/2021, Volume: 12, Issue: 1Journal Article
Abstract Single-atom catalysts (SACs) have been applied in many fields due to their superior catalytic performance. Because of the unique properties of the single-atom-site, using the single atoms as catalysts to synthesize SACs is promising. In this work, we have successfully achieved Co 1 SAC using Pt 1 atoms as catalysts. More importantly, this synthesis strategy can be extended to achieve Fe and Ni SACs as well. X-ray absorption spectroscopy (XAS) results demonstrate that the achieved Fe, Co, and Ni SACs are in a M 1 -pyrrolic N 4 (M= Fe, Co, and Ni) structure. Density functional theory (DFT) studies show that the Co(Cp) 2 dissociation is enhanced by Pt 1 atoms, thus leading to the formation of Co 1 atoms instead of nanoparticles. These SACs are also evaluated under hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), and the nature of active sites under HER are unveiled by the operando XAS studies. These new findings extend the application fields of SACs to catalytic fabrication methodology, which is promising for the rational design of advanced SACs.
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