Issue 34, 2017

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

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 state-of-the-art Pt–C/PdS catalysts suggest their superiority in an alkaline medium. In addition, high mass activity (Jf ∼ 715 mA mg−1), in comparison with that of the commercial state-of-the-art Pt–C/PdS catalysts (Jf ∼ 138/41 mA mg−1, respectively), and high Jf/Jb (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.

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

Supplementary files

Article information

Article type
Paper
Submitted
30 Jun 2017
Accepted
01 Aug 2017
First published
03 Aug 2017

Nanoscale, 2017,9, 12628-12636

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

R. Nandan and K. K. Nanda, Nanoscale, 2017, 9, 12628 DOI: 10.1039/C7NR04733A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements