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题名: Heat treated carbon supported iron(II)phthalocyanine oxygen reduction catalysts: elucidation of the structure-activity relationship using X-ray absorption spectroscopy
作者: Miller, HA; Bellini, M; Oberhauser, W; Deng, X; Chen, HQ; He, QG; Passaponti, M; Innocenti, M; Yang, RO; Sun, FF; Jiang, Z; Vizza, F
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
出版日期: 2016
卷号: 18, 期号:48, 页码:33142-33151
DOI: 10.1039/c6cp06798k
通讯作者: Miller, HA ; Vizza, F (reprint author), ICCOM CNR, Polo Sci Area CNR, Inst Chem Organometall Cpds, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy. ; He, QG (reprint author), Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Zhejiang, Peoples R China.
文章类型: 期刊论文
英文摘要: This paper focuses on studying the influence of the heat treatment on the structure and activity of carbon supported Fe(II) phthalocyanine (FePc/C) oxygen reduction reaction (ORR) catalysts under alkaline conditions. The FePc macrocycle was deposited onto ketjen black carbon and heated treated for 2 hours under inert atmosphere (Ar) at different temperatures (400, 500, 600, 700, 800, 900 and 1000 degrees C). The atomic structure of Fe in each sample has been determined by XAS and correlated to the activity and ORR mechanisms determined in electrochemical half cells and in a complete H-2/O-2 anion exchange membrane fuel cells (AEM-FC). The results show that the samples prepared at 600 and 700 degrees C have the highest electrochemical catalytic activity for the ORR, consistent with the findings that the FeN4 active sites are thermally stable up to 700 degrees C, confirmed by both XANES linear combination fittings and EXAFS fittings. Upon annealing at temperatures above 800 degrees C, the FeN4 structure partially decomposes to small iron nanoparticles. The transition from the FeN4 structure to metallic Fe results in a significant loss in ORR activity and an increase in the production of undesirable HO2- during catalysis.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000390435800058
ISSN号: 1463-9076
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26524
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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