Issue 21, 2019

Pulse electrodeposited nickel with structure directing agents as an electrocatalyst for oxidation of glycerol

Abstract

We report the efficacy of the pulse electrodeposition technique for the preparation of Ni with two structure directing agents, viz citric acid and tetrabutylammonium bromide. The electrodes were characterized using FESEM, TEM, EDAX, XRD, XPS and AFM for surface morphology, chemical composition, preferred orientation, oxidation states and surface roughness. In the presence of the structure directing agents, the surface morphologies get modified from pine-cone to sponge-like structures and the relative intensities of the (111), (220), (311) and (222) crystal planes get enhanced. The electro-oxidation of glycerol is investigated using cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. The electrochemical studies indicate that Ni–CA and Ni–TBr exhibit higher catalytic activity with lower onset potentials of 1.32 and 1.33 V vs. RHE and smaller Tafel slopes of 80 and 84 mV dec−1 than bare Ni. An empirical correlation of the experimental peak current density with the work function of the metals has also been deduced.

Graphical abstract: Pulse electrodeposited nickel with structure directing agents as an electrocatalyst for oxidation of glycerol

Supplementary files

Article information

Article type
Paper
Submitted
19 Mar 2019
Accepted
28 Apr 2019
First published
03 May 2019

New J. Chem., 2019,43, 8352-8362

Pulse electrodeposited nickel with structure directing agents as an electrocatalyst for oxidation of glycerol

P. Sivasakthi and M. V. Sangaranarayanan, New J. Chem., 2019, 43, 8352 DOI: 10.1039/C9NJ01351B

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