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Silver based single atom catalyst with heteroatom coordination environment as high performance oxygen reduction reaction catalyst

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Nano Research 2022年第9期15卷 7968-7975页

作者： Rui Sui Xuejiang Zhang Xingdong Wang Xinyu Wang Jiajing Pei Yufeng Zhang Xuerui Liu Wenxing Chen Wei Zhu Zhongbin Zhuang State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China International Clean Energy Research Office China Three Gorges CorporationBeijing 100038China Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

Ag is a potential low-cost oxygen reduction reaction(ORR)catalyst in alkaline condition,which is important for the zinc-air ***,we report that an Ag based single atom catalyst with heteroatom ***1-h-NPClSC,has been synthesized and shown much improved performance towards ORR by manipulating the coordination environment of the Ag *** shows a high half wave potential(0.896 V)and a high turnover frequency(TOF)(5.9 s^(−1))at 0.85 V,which are higher than the previously reported Ag based catalysts and commercial Pt/C.A zinc-air battery with high peak power density of 270 mW·cm^(−2)is fabricated by using the Ag1-h-NPClSC as air *** high performance is attributed to(1)the hollow structure providing good mass transfer;(2)the single atom metal center structure providing high utility of the Ag;(3)heteroatom coordination environment providing the adjusted binding to the ORR *** functional theory(DFT)calculations show that the energy barrier for the formation of OOH*,which is considered as the rate determine step for ORR on Ag nanoparticles,is lowered on Ag1-h-NPClSC,thus improving the ORR *** work demonstrates that the well manipulated Ag based single atom catalysts are promising in electrocatalysis.

关键词： Ag single-atom heteroatom coordination oxygen reduction zinc-air battery

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