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Rational geometrical engineering of palladium sulfide multi-arm nanostructures as a superior bi-functional electrocatalyst

Nandan, R and Nanda, K K (2017) Rational geometrical engineering of palladium sulfide multi-arm nanostructures as a superior bi-functional electrocatalyst. In: NANOSCALE, 9 (34). pp. 12628-12636.

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Official URL: http://doi.org/10.1039/c7nr04733a

Abstract

Geometrical tunability offers sharp edges and an open-armed structure accompanied with a high electrochemical active surface area to ensure the efficient and effective utilization of materials by exposing the electrochemical active sites for facile accessibility of reactant species. Herein, we report a one-step, single-pot, surfactant-free, electroless, and economic route to synthesize palladium sulfide nanostructures with different geometries at mild temperatures and their catalytic properties towards the oxygen reduction reaction (ORR) and methanol electro-oxidation (MOR). For ORR, the positive on-set, half wave potentials, smaller Tafel slope, high electrochemical active surface area, large roughness factor, and better cyclic stability of the proposed nanostructures as compared to those of the commercial stateof- the-art Pt-C/PdS catalysts suggest their superiority in an alkaline medium. In addition, high mass activity (J(f) similar to 715 mA mg(-1)), in comparison with that of the commercial state-of-the-art Pt-C/PdS catalysts (J(f) similar to 138/41 mA mg(-1), respectively), and high J(f)/J(b) (1.52) along with the superior operational stability of the multi-arm palladium sulfide nanostructures towards MOR advocates the bi-functional behavior of the catalyst and its potential as a promising Pt-free anode/cathode electrocatalyst in fuel cells.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to theROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 30 Sep 2017 09:18
Last Modified: 30 Sep 2017 09:18
URI: http://eprints.iisc.ac.in/id/eprint/57920

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