Oxygen Electroreduction on Heat-treated Multi-walled Carbon Nanotubes Supported Iron Polyphthalocyanine in Acid Media

	Oxygen Electroreduction on Heat-treated Multi-walled Carbon Nanotubes Supported Iron Polyphthalocyanine in Acid Media
	Zhang, R; Peng, YX; Li, ZP; Li, K; Ma, J; Liao, Y; Zheng, LR; Zuo, X; Xia, DG; Zheng LR(郑黎荣)
刊名	ELECTROCHIMICA ACTA
	2014
卷号	147 页码:343-351
关键词	Iron polyphthalocyanine Multi-walled carbon nanotubes Oxygen reduction reaction Heat-treated XAFS
英文摘要	Multi-walled carbon nanotubes (MWCNTs) supported iron phthalocyanine (FePc), binuclear iron phthalocyanine (bi-FePc) and iron polyphthalocyanine (FePPc) were prepared by a solvothermal process. The resulting FePc/MWCNTs, bi-FePc/MWCNTs and FePPc/MWCNTs were heat-treated in argon (Ar) atmosphere at various temperatures ranging from 500 to 900 degrees C to obtain optimized catalysts for the oxygen reduction reaction (ORR). The crystal structure, morphology and chemical environment of the catalysts were examined by ultraviolet-visible (UV-Vis) spectroscopy, X-ray diffraction (XRD), highresolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopy (EDX), Xray photoelectron spectroscopy (XPS) and X-ray absorption fine structure spectroscopy (XAFS). The electrocatalytic activity of the obtained catalysts was measured using a rotating disk electrode (RDE) technique in 0.5 mol L-1 H2SO4 solution saturated with oxygen. The ORR activity of the heat-treated FePPc/MWCNTs was found to be better than that of the heat-treated bi-FePc/MWCNTs and FePc/ MWCNTs. Furthermore, the heat-treatment temperature greatly influenced the catalytic ORR ability of the catalysts. The FePPc/MWCNTs heat-treated at 800 degrees C exhibited a four-electron transfer process and the best ORR activity (E-ORR = 0.79 V vs. RHE), methanol resistance, and stability (current loss = 13% at -0.13 V vs. Hg/Hg2SO4 after 55 h). XPS indicated that pyridine-type nitrogen, not graphitic-N, played a critical role in determining the electrocatalytic ORR activity of the amples. XAFS showed that the coordination geometry around Fe was close to square planar in structure, suggesting that the Fe-N-4 structure was produced by the high temperature treatment. (C) 2014 Elsevier Ltd. All rights reserved.
学科主题	Electrochemistry
收录类别	SCI
WOS记录号	WOS:000346178800043
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224998]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhang, R,Peng, YX,Li, ZP,et al. Oxygen Electroreduction on Heat-treated Multi-walled Carbon Nanotubes Supported Iron Polyphthalocyanine in Acid Media[J]. ELECTROCHIMICA ACTA,2014,147:343-351.
APA	Zhang, R.,Peng, YX.,Li, ZP.,Li, K.,Ma, J.,...&郑黎荣.(2014).Oxygen Electroreduction on Heat-treated Multi-walled Carbon Nanotubes Supported Iron Polyphthalocyanine in Acid Media.ELECTROCHIMICA ACTA,147,343-351.
MLA	Zhang, R,et al."Oxygen Electroreduction on Heat-treated Multi-walled Carbon Nanotubes Supported Iron Polyphthalocyanine in Acid Media".ELECTROCHIMICA ACTA 147(2014):343-351.