Insights into electrochemical behavior and kinetics of NiP on PEDOT:PSS/reduced graphene oxide as high-performance electrodes for alkaline urea oxidation

Lera, IL and Khasnabis, S and Wangatia, LM and Femi, OE and Ramamurthy, PC (2022) Insights into electrochemical behavior and kinetics of NiP on PEDOT:PSS/reduced graphene oxide as high-performance electrodes for alkaline urea oxidation. In: Journal of Solid State Electrochemistry, 26 (1). 195 -209.

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Abstract

Highly efficient, abundant, and low-cost materials are highly demanded for energy conversion applications to address the rising consumption of energy. In this study, polythiophene/reduced graphene (PT/rGO) and PEDOT:PSS/rGO (both Clevios PH1000 and Clevios P Al PH4083) as an efficient and low-cost support material were synthesized via a one-pot two-step in situ chemical polymerization method to enhance the electrocatalytic performance of NiP towards urea oxidation in alkaline media. These materials were characterized using SEM, FTIR, XRD, UV-Vis, and TGA devices. The physical characterization reveals nanospherical NiP with multifaceted phases dispersed on PT/rGO and PEDOT:PSS/rGO. The electrochemical activities of as-synthesized catalyst materials towards urea electrooxidation were tested by using cyclic voltammetry. The electrochemical activity test exhibits the significant performance improvement of NiP when supported on PT/rGO and both grades of PEDOT:PSS incorporated rGO materials. Among the support materials, the highest performance enhancement with a high current density of 91.2 mAcm�2 and lower onset potential of 0.26 V, high electrochemically active surface area, high kinetics, and high stability towards alkaline urea electrooxidation was achieved when NiP dispersed on the surface of PEDOT:PSS/rGO (PH4083). Thus, a new PEDOT:PSS/rGO (PH4083) supported NiP (NiP@PEDOT:PSS/rGO) remarkably outperformed commercial NiP, making it to be a promising anode electrocatalyst material for alkaline urea electrooxidation in direct urea fuel cell (DUFC).

Item Type:	Journal Article
Publication:	Journal of Solid State Electrochemistry
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	The copyright for this article belongs to the Springer Science and Business Media Deutschland GmbH.
Keywords:	Alkalinity; Catalyst activity; Costs; Cyclic voltammetry; Electrocatalysts; Electrodes; Electrooxidation; Energy conversion; Fuel cells; Graphene; Metabolism; Nickel compounds, Alkalines; Efficient costs; Electrocatalyst; Electrooxidations; Onset potential; PEDOT/PSS; Performance; Support materials; Synthesised; Urea oxidation, Urea
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	18 Nov 2021 09:30
Last Modified:	11 Jul 2022 05:55
URI:	https://eprints.iisc.ac.in/id/eprint/70584

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