A Carbon Electrode Functionalized by a Tricopper Cluster Complex: Overcoming Overpotential and Production of Hydrogen Peroxide in the Oxygen Reduction Reaction
作者:Natarajan Thiyagarajan、Damodar Janmanchi、Yi-Fang Tsai、Wondemagegn Hailemichael Wanna、Ravirala Ramu、Sunney I. Chan、Jyh-Myng Zen、Steve S.-F. Yu
DOI:10.1002/anie.201712226
日期:2018.3.26
A study of the oxygen reduction reaction (ORR) on a screen printed carbon electrode surface mediated by the tricopper cluster complex Cu3(7‐N‐Etppz(CH2OH)) dispersed on electrochemically reduced carbon black, where 7‐N‐Etppz(CH2OH) is the ligand 3,3′‐(6‐(hydroxymethyl)‐1,4‐diazepane‐1,4‐diyl)bis(1‐(4‐ethyl piperazin‐1‐yl)propan‐2‐ol), is described. Onset oxygen reduction potentials of about 0.92 V
由分散在电化学还原的炭黑上的三铜簇复合物Cu 3(7‐ N‐ Etppz(CH 2 OH))介导的丝网印刷碳电极表面上的氧还原反应(ORR)的研究,其中7‐ N‐ Etppz (CH 2 OH)是配体3,3'-(6-(羟甲基)-1,4-二氮杂pan-1,4-二基)双(1-(4-乙基哌嗪-1-基)丙烷-2- ol),进行了说明。与可逆氢电极相比,在pH 13和pH 7下观察到约0.92 V和约0.77 V的起始氧还原电势,可与任何合成铜络合物报道的最佳值相比。基于半波电势(E 1/2),相应的过电势分别约为0.42 V和约0.68 V. 动力学研究表明,三核铜催化剂可以完成4 E -减少的O- 2有效地和ORR是伴随着生产只有少量为h 2 ö 2。还证实了三元组铜参与了O 2活化过程。