Electrocatalytic oxidation of water using self-assembled copper(<scp>ii</scp>) tetraaza macrocyclic complexes on a 4-(pyridine-4′-amido)benzene grafted gold electrode
作者:Abhinandan Mahanta、Koushik Barman、Umme Solaem Akond、Sk Jasimuddin
DOI:10.1039/d1nj00630d
日期:——
The oxidation of water is the most crucial step in electrochemical water splitting and artificial photosynthesis. To ease the water oxidation process, the development of stable, robust, and efficient catalysts is needed that can operate under mild conditions. Here we present the heterogenization of a Cu-based molecule [Cu(MC)](ClO4)2 (where MC = 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetra-azacyclotetradeca-4
水的氧化是电化学水分解和人工光合作用中最关键的步骤。为了减轻水的氧化过程,需要开发可以在温和条件下运行的稳定,坚固和高效的催化剂。在这里,我们介绍了基于铜的分子[Cu(MC)](ClO 4)2的异质化(其中MC = 5,7,7,12,14,14-六甲基-1,4,8,11-四氮杂环十四碳-4,11-二烯)通过将其固定在4-(吡啶-4'-酰胺基上苯(L)层修饰的金电极,并探讨其在中性磷酸盐缓冲溶液中对水的电催化氧化活性。使用FE-SEM,EDX,ATR-FTIR,SERS,CV和EIS技术对改性电极进行了表征。新开发的表面结合复合物[Cu(MC)]-L-Au可以极好地催化氧释放反应(OER),起始超电势为227 mV(J = 1.0 mA cm -2),超电势为〜284 mV在J = 1.32 mA cm -2和48 mV十进制-1的低Tafel斜率下。此外,基于铜的非均相电催化剂在受控电势电