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Cyanogenic glycosides: A sustainable carbon and nitrogen source for developing resilient Janus reversible oxygen electrocatalysts for metal-air batteries

Nandan, Ravi and Nanda, Sankalpa (2019) Cyanogenic glycosides: A sustainable carbon and nitrogen source for developing resilient Janus reversible oxygen electrocatalysts for metal-air batteries. In: CARBON, 155 . pp. 155-165.

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Official URL: https://dx.doi.org/10.1016/j.carbon.2019.08.053

Abstract

Most of the transition metal based heteroatom doped carbon electrocatalysts, utilizes the fossil fuel derived commercially available precursors as source of nitrogen and carbon which may question our environmental generosity. Herein, we have developed Ni-based efficient bifunctional electrocatalysts using apple seeds (that contains cyanogenic glycosides) as the precursor for nitrogen and carbon. With tuning the temperature, we were able to optimize the nitrogen doping up to similar to 3 at.%. The optimized electrocatalyst catalyses the oxygen reduction reaction (ORR) process with muted peroxide generation (for 0.750-0.1 V the % HO2- generation similar to 3 - 2%), preferential 4e(-) reduction pathways (n similar to 3.93 to 3.98 in 0.75-0.1 V range) and electron transfer via inner-sphere electron transfer mechanism which ensures the maximum utilization of instituted active centres owing to the direct interaction of reactant species. Alike to ORR, the superior oxygen evolution reaction (OER) performance with smaller E-onset, E-J =10, Tafel slope and enduring accelerated stability test advocates its potential as a bifunctional oxygen electrocatalyst. Moreover, smaller potential gap Delta E (E-J10_(OER) - E-1/2_(ORR)) of 0.845 V further warrants the energy efficient OER/ORR process. A porotype of Al-air battery system using our catalysts as oxygen electrode and chocolate wafer as anode material is well capable of powering the light emitting diodes. This study hopefully opens a new avenue to explore cyanogenic glycosides plants product to develop multifunctional electrocatalysts.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to PERGAMON-ELSEVIER SCIENCE LTD
Keywords: N-DOPED CARBON; ONE-POT SYNTHESIS; BIFUNCTIONAL ELECTROCATALYSTS; FUEL-CELL; BIMETALLIC NANOPARTICLES; ASSISTED SYNTHESIS; FACILE SYNTHESIS; GRAPHENE; REDUCTION; NANOSTRUCTURES
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 21 Nov 2019 07:53
Last Modified: 21 Nov 2019 07:53
URI: http://eprints.iisc.ac.in/id/eprint/63799

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