A Keggin Polyoxometalate Shows Water Oxidation Activity at Neutral pH: POM@ZIF‐8, an Efficient and Robust Electrocatalyst. (16th January 2018)

• Record Type: Journal Article
• Authors: Mukhopadhyay, Subhabrata; Debgupta, Joyashish; Singh, Chandani; Kar, Aranya; Das, Samar K.
• Is Part Of: Angewandte Chemie. Volume 130:Number 7(2018)
• Page Start: 1936
• Page End: 1941
• Publication Date: 2018-01-16
• Subjects: Elektrokatalyse -- Keggin-Polyoxometallate -- Neutraler pH-Bereich -- Wasseroxidation -- ZIF-8-MOF; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201711920
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: 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 CoO x in this electrocatalyic water oxidation.