Thermal treatment of Co(II) tetracarboxyphenyl porphyrin supported on carbon as an electrocatalyst for oxygen reduction
Thermal treatment of Co(II) tetracarboxyphenyl porphyrin supported on carbon as an electrocatalyst for oxygen reduction
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碳负载 Co(II) 四羧基苯基卟啉的热处理作为氧还原电催化剂
DOI：
10.1016/j.ijhydene.2010.01.020
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发表时间：
2010-08
期刊：
影响因子：
--
通讯作者：
Li, Zhongfang
中科院分区：
文献类型：
--
作者：
Wang, Suwen;Yu, Xianjin;Xu, Guofeng;Ji, Yanfeng;Li, Zhongfang
紫外-可见光和傅里叶变换红外吸收光谱表明，5,10,15,20-四(4-羧基苯基)-卟啉Co(II)(TCPPCo)在氩气气氛下于400℃下热处理可得到聚四苯基卟啉Co(II)(PTPPCo)。聚四苯基卟啉 Co/C 是通过将 TCPPCo 吸附在具有不同 Co-N4 负载量的 Vulcan XC-72 上，在氩气气氛中从 400 °C 到 1000 °C 进行热处理 (HT) 获得的。评估催化剂在硫酸溶液中修饰电极上氧的电还原性能。催化剂电还原结果（HT 600 °C 和 6 wt% Co-N4 负载）显示，相对于可逆氢电极，原始还原电压为 0.81 V，转移电子数为 3.83。通过 X 射线衍射光谱和能量色散 X 射线透射电子显微镜对催化剂的形貌、分布和表面元素分析进行了表征。 PTPPCo 可以均匀地锚固在碳载体上，并在 600 °C 的热处理下承受分解。由于 TCPPCo 导致 XC-72 上的聚合，因此 pi (π) 键随着 π 电子离域能的降低而显着增加。观察到电子获得或损失的能力得到改善，并且电催化中心明显暴露。因此，本文提出的催化剂的活性、稳定性和选择性均优于其他常见催化剂。
Ultraviolet–visible and fourier transform infrared absorption spectra indicate that polytetraphenylporphyrin Co (II) (PTPPCo) can be obtained by heat-treating 5,10,15,20-tetra (4-carboxyphenyl)-porphyrin Co (II) (TCPPCo) at 400 °C in argon atmosphere. Polytetraphenylporphyrin Co/C is obtained by heat treatment (HT) of TCPPCo, which is adsorbed on Vulcan XC-72 with different Co–N4loading, from 400 °C to 1000 °C in argon atmosphere. Catalysts are evaluated for electroreduction performances of oxygen on modified electrodes in sulfuric acid solutions. Results from electroreduction of the catalyst (HT 600 °C and 6 wt% Co–N4loading) show the original reduction voltage is 0.81 V versus the reversible hydrogen electrode, and the transfer electron number is 3.83. The morphology, distribution, and surface elemental analysis of the catalysts are characterized by x-ray diffraction spectroscopy and transmission electron microscopy with energy dispersive x-ray. PTPPCo can homogeneously anchor on the carbon support and withstand decomposition upon heat treatment at 600 °C. Since TCPPCo results in polymerization on XC-72, pi (π) bond increases significantly with the decrease in π-electron delocalization energy. Improved capacity in electron gain or loss is observed, and the center of electrocatalysis is clearly exposed. Thus, the activity, stability, and selectivity of the catalyst presented in this paper are proven better than those of other common catalysts.
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DOI：
10.2172/5850798
发表时间：
1989-10
期刊：
--
影响因子：
--
作者：
E. Yeager
通讯作者：
E. Yeager
影响因子：
7.2
作者：
S. Ye;A. Vijh
通讯作者：
S. Ye;A. Vijh
影响因子：
4.5
作者：
W. Zheng;N. Shan;Lian-xiang Yu;Xingqiao Wang
通讯作者：
W. Zheng;N. Shan;Lian-xiang Yu;Xingqiao Wang
影响因子：
5.4
作者：
Zifeng Ma;Xian-Yu Xie;Xiao-xia Ma;Dong-yun Zhang;Q. Ren;N. Heß-Mohr;V. M. Schmidt
通讯作者：
Zifeng Ma;Xian-Yu Xie;Xiao-xia Ma;Dong-yun Zhang;Q. Ren;N. Heß-Mohr;V. M. Schmidt
影响因子：
3.9
作者：
Toda, T;Igarashi, H;Watanabe, M
通讯作者：
Watanabe, M