Cobalt-Porphyrin-Catalyzed Oxygen Reduction Reaction: AScanning Tunneling Microscopy Study
Cobalt-Porphyrin-Catalyzed Oxygen Reduction Reaction: AScanning Tunneling Microscopy Study
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钴卟啉催化的氧还原反应：扫描隧道显微镜研究
DOI：
10.1002/celc.201600435
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发表时间：
2016-12-01
期刊：
影响因子：
4
通讯作者：
Wan, Li-Jun
中科院分区：
文献类型：
--
作者：
Cai, Zhen-Feng;Wang, Xiang;Wan, Li-Jun
利用电化学扫描隧道显微镜（ECSTM）研究了5，10，15，20-四苯基-21H，23H-卟啉钴（CoTPP）催化的氧还原反应（ORR）.在Au（111）电极上显示出高度有序的CoTPP吸附层。高对比度的吸附物种的监测CoTPP吸附层在含氧电解质中，并归因于CoTPP-O-2复合物的形成。原位STM结果揭示了在切换底物电位以触发ORR时的急剧对比度变化。研究结果有助于理解金属卟啉在有机反应中的催化作用，对金属卟啉催化剂的设计具有重要意义。
We report an insitu electrochemical scanning tunneling microscopy (ECSTM) investigation of the 5,10,15,20-tetraphenyl-21H,23H-porphine cobalt(II) (CoTPP)-catalyzed oxygen reduction reaction (ORR). A highly ordered CoTPP adlayer is revealed on the Au(111) electrode. High-contrast adsorbed species are monitored in CoTPP adlayer in electrolyte containing oxygen, and are attributed to the formation of CoTPP-O-2 complexes. Insitu STM results reveal the sharp contrast changes upon switching the substrate potential to trigger the ORR. The results benefit the understanding of the catalytic role of metal porphyrins (MPs) in the ORR, which is important for the design of MP-based catalysts.