Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 7, Pages 1918-1923Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201711920
Keywords
electrocatalysis; Keggin polyoxometalates; neutral pH; water oxidation; ZIF-8 MOF
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Funding
- SERB, DST, Government of India [SB/S1/IC-34/2013]
- DST-INSPIRE, New Delhi
- DSKPDF Scheme, UGC, New Delhi
- UGC-BSR
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Keggin-type polyoxometalate anions [XM12O40](n-) are versatile, as their applications in interdisciplinary areas show. The Keggin anion [CoW12O40](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)center dot[H6CoW12O40]@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 O-2(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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