文献类型：期刊文献

英文题名：Heat treated Tethered Iron Phthalocyanine Carbon Nanotube-based Catalysts for Oxygen Reduction Reaction in Hybrid Fuel Cells

作者：Huang, Wenjiao[1];Ahlfield, John M.[2];Kohl, Paul A.[2];Zhang, Xinsheng[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA

年份：2017

卷号：257

起止页码：224

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20174304297371);WOS:【SCI-EXPANDED(收录号:WOS:000414067900026)】；

基金：This work was supported by the China Scholarship Council. I gratefully acknowledge Oluwadamilola Phillips for XPS characterization of catalysts and technical discussion.

语种：英文

外文关键词：Metal phthalocyanine; Functionalized carbon nanotubes; Electrocatalysts; Heat treatment; Hybrid PEM/AEM fuel cell

摘要：A heat-treated iron phthalocyanine with an axial ligand anchored on carbon nanotubes (P-FePc-py-CNT) was synthesized and evaluated in hybrid H-2/O-2 fuel cells. Carbon nanotubes were used as the support for iron phthalocyanine with heat treatment (P-FePc-CNT), nitrogen-doped carbon nanotubes were used as the support for iron phthalocyanine with heat treatment (P-FePc-CNTN), and pyridine axial ligand functionalized carbon nanotubes were used as the support for iron phthalocyanine without heat treatment (FePc-py-CNT). Each sample was compared with P-FePc-py-CNT in a hybrid H-2/O-2 fuel cell. The pyridine-functionalized carbon nanotubes (py-CNTs) were synthesized through diazonium reaction while the nitrogen-doped carbon nanotubes (CNTN) are synthesized by thermal annealing approach. The functionalization of CNTs of the catalysts was investigated by Raman spectroscopy. The existence of nitrogen functional groups on carbon nanotubes and the type of functional groups after pyrolysis was confirmed by x-ray photoelectron spectroscopy (XPS). The thermogravimetric analysis (TGA) results showed that the Fe content in the catalysts was about 7 to 9 wt%. The P-FePc-py-CNT was found to perform best among the non-noble catalysts while the P-FePc-CNTN was unstable in a hybrid H2/O2 fuel cell. The results suggest that adding an axial ligand on the back side of FePc before heat treatment can facilitate the oxygen reduction reaction. (C) 2017 Elsevier Ltd. All rights reserved.