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
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酸性介质中热处理多壁碳纳米管负载铁聚酞菁的氧电还原
DOI：
10.1016/j.electacta.2014.09.064
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发表时间：
2014-11
影响因子：
6.6
通讯作者：
Dingguo Xia
中科院分区：
文献类型：
--
作者：
Rui Zhang;Yingxiang Peng;Zhipan Li;Kai Li;Jie Ma;Yi Liao;Lirong Zheng;Xia Zuo;Dingguo Xia
采用溶剂热法制备了多壁碳纳米管（MWCNTs）负载酞菁铁（FePc）、双核酞菁铁（bi-FePc）和多酞菁铁（FePPc）。将所得的FePc/MWCNT、bi-FePc/MWCNT和FePPc/MWCNT在氩气（Ar）气氛中在500至900 °C范围内的各种温度下热处理，以获得用于氧还原反应（ORR）的优化催化剂。采用紫外-可见光谱（UV-Vis）、X射线衍射（XRD）、高分辨透射电子显微镜（HRTEM）、能量色散X射线能谱（EDX）、X射线光电子能谱（XPS）和X射线吸收精细结构谱（XAFS）对催化剂的晶体结构、形貌和化学环境进行了表征。使用旋转盘电极（RDE）技术在用氧饱和的0.5 mol L-1H 2SO 4溶液中测量所得催化剂的电催化活性。热处理后的FePPc/MWCNTs的ORR活性优于热处理后的bi-FePc/MWCNTs和FePc/MWCNTs。此外，热处理温度对催化剂的催化氧化还原能力有很大影响。在800 °C下热处理的FePPc/MWCNTs表现出四电子转移过程和最佳的ORR活性（EORR= 0.79 V vs. RHE）、耐甲醇性和稳定性（在-0.13 V vs. Hg/Hg 2SO 4下55 h后电流损失= 13%）。XPS表明吡啶型氮，而不是石墨型氮，在决定样品的电催化ORR活性中起关键作用。XAFS结果表明，Fe-N4的配位几何结构接近于正方平面结构，表明Fe-N4结构是高温处理后形成的。
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 °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), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopy (EDX), X-ray 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−1H2SO4solution 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 °C exhibited a four-electron transfer process and the best ORR activity (EORR= 0.79 V vs. RHE), methanol resistance, and stability (current loss = 13% at –0.13 V vs. Hg/Hg2SO4after 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-N4structure was produced by the high temperature treatment.
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影响因子：
2.9
作者：
C. Coutanceau;A. Rakotondrainibe;A. Lima;E. Garnier;S. Pronier;J. Léger;C. Lamy
通讯作者：
C. Coutanceau;A. Rakotondrainibe;A. Lima;E. Garnier;S. Pronier;J. Léger;C. Lamy
影响因子：
2.9
作者：
L. Ramavathu;K. K. Maniam-K.;Keerthiga Gopalram;R. Chetty
通讯作者：
L. Ramavathu;K. K. Maniam-K.;Keerthiga Gopalram;R. Chetty
影响因子：
3.7
作者：
A. Titov;P. Zapol;P. Král;Di-Jia Liu;H. Iddir;K. Baishya;L. Curtiss
通讯作者：
A. Titov;P. Zapol;P. Král;Di-Jia Liu;H. Iddir;K. Baishya;L. Curtiss
影响因子：
7.2
作者：
Chang, Sun-Tang;Huang, Hsin-Chih;Wang, Chen-Hao
通讯作者：
Wang, Chen-Hao
石墨烯载体增强无铂铁酞菁的催化性能，实现高效氧还原反应
影响因子：
12.9
作者：
Jiang, Yuanyuan;Lu, Yizhong;Chen, Wei
通讯作者：
Chen, Wei