Biswal, SK and Ranjan, C (2024) Ni-Doped Cu Oxide Catalysts for ORR: Suppressing H2O2 Formation By Engineering Chemical Strain. In: ACS Applied Energy Materials .
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Abstract
Ni-doped copper oxide (CuNiOx/Au) has demonstrated considerable promise toward efficient oxygen reduction reaction (ORR) under alkaline conditions. The Cu-rich samples like Cu0.8Ni0.2Ox/Au show better activity and selectivity than benchmarks such as Pt and Au, exhibiting H2O2 yields <5% throughout a sizable potential range. The electrode�s performance did not degrade even under 3000 potential cycles under ORR conditions. In situ Raman spectroscopy indicated a Cu-O-Ni type framework where Ni doping into CuOx results in coordinatively unsaturated Ni centers within the Cu-O-Ni framework. These centers are active toward easier cleavage of O-O bonds resulting in an overall preference for the 4e pathway for O2 reduction to H2O. © 2024 American Chemical Society.
| Item Type: | Journal Article |
|---|---|
| Publication: | ACS Applied Energy Materials |
| Publisher: | American Chemical Society |
| Additional Information: | The copyright for this article belongs to the publisher. |
| Keywords: | Alkalinity; Electrolytic reduction; Oxygen reduction reaction; Photoionization, Bond cleavages; Cu oxide; Doped copper oxides; In-situ Raman spectroscopy; Ni-doped; Oxides catalysts; Oxygen reduction reaction; O�O bond cleavage; Reaction under; Transitional metal oxide, Copper oxides |
| Department/Centre: | Division of Chemical Sciences > Inorganic & Physical Chemistry |
| Date Deposited: | 25 Sep 2024 10:09 |
| Last Modified: | 25 Sep 2024 10:09 |
| URI: | http://eprints.iisc.ac.in/id/eprint/86276 |
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