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Carbon Derived from Soft Pyrolysis of a Covalent Organic Framework as a Support for Small-Sized RuO2 Showing Exceptionally Low Overpotential for Oxygen Evolution Reaction

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dc.contributor.author CHAKRABORTY, DEBANJAN en_US
dc.contributor.author NANDI, SHYAMAPADA en_US
dc.contributor.author Illathvalappil, Rajith en_US
dc.contributor.author MULLANGI, DINESH en_US
dc.contributor.author MAITY, RAHUL en_US
dc.contributor.author Singh, Santosh K. en_US
dc.contributor.author HALDAR, SATTWICK en_US
dc.contributor.author Vinod, Chathakudath P. en_US
dc.contributor.author Kurungot, Sreekumar en_US
dc.contributor.author VAIDHYANATHAN, RAMANATHAN en_US
dc.date.accessioned 2019-09-03T05:22:17Z
dc.date.available 2019-09-03T05:22:17Z
dc.date.issued 2019-08 en_US
dc.identifier.citation ACS Omega, 4(8), 13465–13473. en_US
dc.identifier.issn 2470-1343 en_US
dc.identifier.uri http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/3836
dc.identifier.uri https://doi.org/10.1021/acsomega.9b01777 en_US
dc.description.abstract Electrochemical water splitting is the most energy-efficient technique for producing hydrogen and oxygen, the two valuable gases. However, it is limited by the slow kinetics of the anodic oxygen evolution reaction (OER), which can be improved using catalysts. Covalent organic framework (COF)-derived porous carbon can serve as an excellent catalyst support. Here, we report high electrocatalytic activity of two composites, formed by supporting RuO2 on carbon derived from two COFs with closely related structures. These composites catalyze oxygen evolution from alkaline media with overpotentials as low as 210 and 217 mV at 10 mA/cm2 , respectively. The Tafel slopes of these catalysts (65 and 67 mV/dec) indicate fast kinetics compared to commercial RuO2. The observed activity is the highest among all RuO2-based heterogeneous OER catalystsa touted benchmark OER catalyst. The high catalytic activity arises from the extremely small-sized (∼3−4 nm) RuO2 nanoparticles homogeneously dispersed in a micro-mesoporous (BET = 517 m2 /g) COF-derived carbon. The porous graphenic carbon favors mass transfer, while its N-rich framework anchors the catalytic nanoparticles, making it highly stable and recyclable. Crucially, the soft pyrolysis of the COF enables the formation of porous carbon and simultaneous growth of small RuO2 particles without aggregation. en_US
dc.language.iso en en_US
dc.publisher American Chemical Society en_US
dc.subject Chemistry en_US
dc.subject TOC-AUG-2019 en_US
dc.subject 2019 en_US
dc.title Carbon Derived from Soft Pyrolysis of a Covalent Organic Framework as a Support for Small-Sized RuO2 Showing Exceptionally Low Overpotential for Oxygen Evolution Reaction en_US
dc.type Article en_US
dc.contributor.department Dept. of Chemistry en_US
dc.identifier.sourcetitle ACS Omega en_US
dc.publication.originofpublisher Foreign en_US


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