Arc plasma-deposited Co single-atom catalysts supported on an aligned carbon nanofiber for hydrogen peroxide electrosynthesis and an electro-Fenton process  

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作  者:Chang‐Kyu Hwang Sooyeon Kim Ki Ro Yoon Thao Thi Le Chinh V.Hoang Jae Won Choi Wenjun Zhang Sae Yane Paek Chung Hyeon Lee Ji Hyun Lee Keun Hwa Chae Sohee Jeong Seung Yong Lee Byeong-Kwon Ju Sang Hoon Kim Sang Soo Han Jong Min Kim 

机构地区:[1]Materials Architecturing Research Center, Korea Institute of Science and Technology (KIST)),secul,Secrngbuk-gu,Republic of Korea [2]Department of Micro/Nano Systems, Korea University,Seoul,Seongbuk-gu,Republic of Korea [3]Computational Science Research Center, Korea Institute of Science and Technology (KIST),Secul,Secrngbuk-gu,Republic of Korea [4]Advanced Textile R&D Department, Korea Institute of Industrial Technology (KITECH),Amsan,Gyeonggi-do,Republic of Korea [5]Extreme Materials Research Center, Korea Institute of Science and Technology (KIST),Seoul,Seongbuk:gu,Repubic of Korea [6]Nanoscience and Technology, KIST School, University of Science and Technology,Seoul,Republic of Korea [7]Advanced Analysis and Data Center, Korea Institute of Science and Technology,Seoul,Seongbuk-gu,Republic of Korea [8]Display and Nanosensor Laboratory, School of Electrical Engineering, Korea University,Seoul,Seongbuk gu,Republic of Korea [9]KHU-KIST Department of Converging Science and Technology, Kyung Hee University,Seoul,Seongbuk-gu,Repubic of Korea

出  处:《Carbon Energy》2024年第11期234-255,共22页碳能源(英文)

基  金:This work was supported by the KIST Institutional Program(2E32461);the NationalResearch Council of Science&Technology(NST)grant(CPS21041-100);the National Research Foundation ofKorea(NRF)grant funded by the Korea Government(MSIT)(No.RS-2023-00209940,NRF-2022R 1F1A1068725, NRF-2022M3H4A7046278);Korea EnvironmentIndustry&Technology Institute(KEITI)through theEcological Imitation-based Environmental Pollution Man-agement Technology Development Project,funded by theKorea Ministry of Environment(MOE)(2021002800005).

摘  要:Atomically dispersed single-atom catalysts(SACs)on carbon supports show great promise for H_(2)O_(2) electrosynthesis,but conventional wet chemistry methods using particulate carbon blacks in powder form have limited their potential as two-electron(2^(e−))oxygen reduction reaction(ORR)catalysts.Here,we demonstrate high-performance Co SACs supported on a free-standing aligned carbon nanofiber(CNF)using electrospinning and arc plasma deposition(APD).Based on the surface oxidation treatment of aligned CNF and precise control of the deposition amount in a dry-based APD process,we successfully form densely populated Co SACs on aligned CNF.Through experimental analyses and density functional theory calculations,we reveal that Co SAC has a Co–N_(2)–O_(2) moiety with one epoxy group,leading to excellent 2^(e−)ORR activity.Furthermore,the aligned CNF significantly improves mass transfer in flow cells compared to randomly oriented CNF,showing an overpotential reduction of 30 mV and a 1.3-fold improvement(84.5%)in Faradaic efficiency,and finally achieves an outstanding production rate of 15.75 mol gcat^(−1) h^(−1) at 300 mA cm^(−2).The high-performance Co SAC supported on well-aligned CNF is also applied in an electro-Fenton process,demonstrating rapid removal of methylene blue and bisphenol F due to its exceptional 2e^(−)ORR activity.

关 键 词:arc plasma deposition ELECTRO-FENTON flow reactor hydrogen peroxide production oxygen reduction reaction single-atom catalysts 

分 类 号:O64[理学—物理化学]

 

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