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作 者:Heeyeon An Hyewon Jeon Jungyeon Ji Yongchai Kwon Yongjin Chung
机构地区:[1]Department of Chemical and Biological Engineering,Korea National University of Transportation,50 Daehak-ro,Chungju,Chungbuk 27469,Republic of Korea [2]Graduate School of Energy and Environment,Seoul National University of Science and Technology 232 Gongneung-ro,Nowon-gu,Seoul 01811,Republic of Korea [3]Department of Chemical and Biomolecular Engineering,Seoul National University of Science and Technology,232 Gongneung-ro,Nowon-gu,Seoul 01811,Republic of Korea [4]Department of ITÁEnergy Convergence(BK21 FOUR),Korea National University of Transportation,50 Daehak-ro,Chungju,Chungbuk 27469,Republic of Korea
出 处:《Journal of Energy Chemistry》2021年第7期463-471,共9页能源化学(英文版)
基 金:supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(Nos.2017R1D1A1B03032033 and 2020R1C1C1010386);“Leaders in INdustry-university Cooperation+”project supported by the Ministry of Education and National Research Foundation of Korea。
摘 要:In this study,an amine-coordinated cobalt phthalocyanine(CoPc)-based anodic catalyst was fabricated by a facile process,to enhance the performance of hydrogen peroxide fuel cells(HPFCs) and enzymatic biofuel cells(EBCs).For this purpose,polyethyleneimine(PEI) was added onto the reduced graphene oxide and CoPc composite(RGO/CoPc) to create abundant NH2 axial ligand groups,for anchoring the Co core within the CoPc.Owing to the PEI addition,the onset potential of the hydrogen peroxide oxidation reaction was shifted by 0.13 V in the negative direction(0.02 V) and the current density was improved by 1.92 times(1.297 mA cm^(-2)),compared to those for RGO/CoPc(0.15 V and 0.676 mA cm^(-2),respectively),due to the formation of donor-acceptor dyads and the prevention of CoPc from leaching out.The biocatalyst using glucose oxidase(GOx)([RGO/CoPc]/PEI/GOx) showed a better onset potential and catalytic activity(0.15 V and 318.7 μA cm^(-2)) than comparable structures,as well as significantly improved operational durability and long-term stability.This is also attributed to PEI,which created a favorable microenvironment for the enzyme.The maximum power densities(MPDs) and open-circuit voltages(OCVs) obtained for HPFCs and EBCs using the suggested catalyst were 105.2±1.3 μW cm^(-2)(0.317±0.003 V) and 25.4±0.9 μW cm^(-2)(0.283±0.007 V),respectively.This shows that the amine axial ligand effectively improves the performance of the actual driving HPFCs and EBCs.
关 键 词:Hydrogen peroxide fuel cell Enzymatic biofuel cell Amine axial ligand Hydrogen peroxide oxidation reaction MEMBRANELESS
分 类 号:TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]
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