期刊
JOURNAL OF POWER SOURCES
卷 480, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.228860
关键词
Cobalt phthalocyanine; H2O2 fuel cell; Hydrogen peroxide oxidation reaction; Membraneless fuel cell; Polyacrylic acid
资金
- National Research Foundation of Korea (NRF)
- Ministry of the Ministry of Education (MOE) of the Republic of Korea [2017R1D1A1B03032033, 2019R1A2C1005776]
- Korea government(MSIT) [2020R1C1C1010386]
- National Research Foundation of Korea [2020R1C1C1010386, 2017R1D1A1B03032033, 2019R1A2C1005776] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A catalyst capable of high performance and good durability is developed for use in anode of flow-type membraneless hydrogen peroxide fuel cells (HPFCs). For that, cobalt phthalocyanine (CoPc) is immobilized onto reduced graphene oxide (rGO) linked to polyacrylic acid (PAA) surface modifier (rGO/PAA/CoPc). CoPc moiety containing PAA is tightly immobilized due to physical entrapment, axial ligand and stabilization of intermediates. According to evaluations, the amount of CoPc immobilized in rGO/PAA/CoPc is twice than that in rGO/CoPc because rGO and CoPc are weakly connected by 7C -7C conjugation without PAA acting as axial ligand to form coordinate bond with Co core within CoPc. In rGO/PAA/CoPc, current density for hydrogen peroxide oxidation reaction (HPOR) is 2.7 times higher than that measured in rGO/CoPc due to axial ligand role of PAA activating two HPOR pathways, wheras rGO/CoPc is only linked to one HPOR pathway. Even in stability test, rGO/PAA/CoPc preserves 90.0% of its initial HPOR current density, while that of Ni bulk is decreased by 30.6%. When performance of HPFC using rGO/PAA/CoPc is measured with a low concentration of H2O2 (0.1 mol L-1) of under physiological condition, its maximum power density (72.1 +/- 2.68 mu Wcm(2)) is better than that of HPFC using rGO/CoPc (38.3 +/- 0.20 mu Wcm(2)).
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