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Lattice confined Ru single sites in hollow Co_(9)S_(8)polyhedron triggering Co-S-Ru catalytic centers for rechargeable Zn-air battery

查看全文 作　　者：Xuan [1]Liu;Siru [2]Chen;Huicheng [3]Wang;Anmin [1]Liu;Shizheng [4]Wen;Liwei [2]Mi;Yanqiang [3]Li 高影响力作者 机构地区：[1]School of Chemical Engineering,Dalian University of Technology,Panjin Campus,Panjin 124221,China;[2]School of Material and Chemical Engineering,Center for Advanced Materials Research,Zhongyuan University of Technology,Zhengzhou 450007,China;[3]School of Materials Science and Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;[4]School of Physics and Electronic Electrical Engineering,Huaiyin Normal University,Huai’an 223300,China高影响力机构 出　　处：《Nano Research》索引2023年第16卷第5期,共9页高影响力期刊 基　　金：the National Natural Science Foundation of China(No.21902189);Key Scientific Research Projects of Universities in Henan Province(No.21A150062);Young Backbone Teacher of Zhongyuan University of Technology(No.2020XQG09);the Fundamental Research Funds of Zhongyuan University of Technology(No.K2020YY003). 摘　　要：Single-atom catalysts with precise structure and tunable coordination nature provide opportunities for developing novel catalytic centers and understanding reaction mechanisms.Herein,hollow Co_(9)S_(8)polyhedrons with lattice-confined Ru single atoms(Ru-Co_(9)S_(8))are fabricated.Aberration-corrected scanning transmission electron microscopy and X-ray absorption spectroscopy verify the isolated Ru atoms are confined in Co_(9)S_(8)to form Co-S-Ru catalytic centers.Theoretical calculations indicate that the oxygen evolution reaction(OER)and oxygen reduction reaction(ORR)energy barriers are extensively reduced,the d-band center of Co_(9)S_(8)downshifts from the Fermi level,therefore boosting the desorption of O-containing intermediates.Consequently,the Ru-Co_(9)S_(8)exhibits an ultralow overpotential of 163 mV at 10 mA·cm^(−2)for OER and could catalyze a rechargeable Zn-air battery with a high-power density of 92.0 mW·cm^(−2).This work provides a promising approach for designing novel bifunctional catalytic active centers for energy conversion. 关 键 词：electrocatalysis single-atom catalysts lattice confinement bifunctional catalysts Zn-air battery
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