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Layer by layer assembly of a bio-inspired manganese cluster for electrocatalytic water oxidation
Journal of Catalysis ( IF 7.3 ) Pub Date : 2020-05-29 , DOI: 10.1016/j.jcat.2020.05.030
Yifat Cohen , Naama Gluz , Shay Bamany , Galia Maayan , Omer Yehezkeli

Mn12O12(O2CC6H3(NH2)2)16(H2O)4 (Mn12DA) is a structural mimic of the oxygen-evolving-complex in photosystem II. Herein we describe a method to integrate the Mn12DA with ITO electrodes using a layer-by-layer approach. Using (3-Aminopropyl)triethoxysilane, (APTES), glutaraldehyde, Mn12DA, and sodium cyanoborohydride as a mild reducing agent, five layers of the electrocatalysts with maximal electrocatalytic currents were obtained. The integration method limits the ligand self-oxidation and prevents the catalyst failure. Furthermore, the developed configuration enables efficient water oxidation electrocatalytic reaction at pH = 7, with an overpotential of 430 mV, a faradaic efficiency of 92% and a high turn-over-number.



中文翻译:

逐层组装的生物启发性锰簇用于电催化水氧化

Mn 12 O 12(O 2 CC 6 H 3(NH 2216(H 2 O)4Mn 12 DA)是光系统II中析氧复合物的结构模拟。在本文中,我们描述了一种使用逐层方法将Mn 12 DA与ITO电极集成在一起的方法。使用(3-氨基丙基)三乙氧基硅烷(APTES),戊二醛,Mn 12 DA,并用氰基硼氢化钠作为温和的还原剂,得到了五层电催化电流最大的电催化剂。积分方法限制了配体的自氧化并防止了催化剂失效。此外,开发的配置可在pH = 7时实现高效的水氧化电催化反应,超电势为430 mV,法拉第效率为92%,周转次数高。

更新日期:2020-06-23
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