多金属氧酸盐
电催化剂
催化作用
化学
Keggin构造
无机化学
析氧
电化学
分解水
金属有机骨架
材料科学
电极
物理化学
光催化
有机化学
吸附
作者
Subhabrata Mukhopadhyay,Joyashish Debgupta,Chandani Singh,Aranya Kar,Samar K. Das
标识
DOI:10.1002/anie.201711920
摘要
Keggin-type polyoxometalate anions [XM12 O40 ]n- are versatile, as their applications in interdisciplinary areas show. The Keggin anion [CoW12 O40 ]6- turns into an efficient and robust electrocatalyst upon its confinement in the well-defined void space of ZIF-8, a metal-organic framework (MOF). [H6 CoW12 O40 ]@ZIF-8 is so stable to water oxidation that it retains its initial activity even after 1000 catalytic cycles. The catalyst has a turnover frequency (TOF) of 10.8 mol O2 (mol Co)-1 s-1 , one of the highest TOFs for electrocatalytic oxygen evolution at neutral pH. Controlled experiments rule out the chances of formation and participation of CoOx in this electrocatalyic water oxidation.
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