Vertically Aligned Few-Layer Crumpled MoS2 Hybrid Nanostructure on Porous Ni Foam toward Promising Binder-Free Methanol Electro-Oxidation Application

Gopalakrishnan, Arthi and Durai, Lignesh and Ma, Jiaojiao and Kong, Chang Yi and Badhulika, Sushmee (2021) Vertically Aligned Few-Layer Crumpled MoS2 Hybrid Nanostructure on Porous Ni Foam toward Promising Binder-Free Methanol Electro-Oxidation Application. Energy & Fuels, 35 (12). pp. 10169-10180. ISSN 0887-0624

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Abstract

MoS2, a two-dimensional nanomaterial analogous to graphene, has interesting catalytic properties that make it suitable for the hydrogen evolution reaction, but reports are scarce on its fuel cell application. Herein, we report a novel vertically aligned crumpled MoS2 nanosheet hybrid nanostructure architecture on porous Ni foam (MoS2/NF-5) via a facile, one-pot hydrothermal synthesis approach. The porous binder-free Ni foam (NF) promotes the uniform growth of ultrathin MoS2 nanosheets, due to its grain boundaries acting as nucleation sites, and reduces the interfacial resistance between MoS2 and substrate. The hybrid nanostructure of spongy nanoparticles decorated over nanosheets morphology provides synergistic effect for rapid charge transfer reaction with short diffusion path and enhances the electrocatalytic active sites. The electrochemical analysis of as-obtained optimized MoS2/NF-5 reveals an outstandingly high electroactive surface area with the presence of both adsorption and diffusion process at the surface, indicating its potential toward a variety of electrochemical applications. The binder-free MoS2/NF-5 displays excellent electro-oxidation of methanol with high current tolerance of 73 mA/cm2, high durability (only 20% loss after 5000 s), and low overpotential (0.3 V) due to the presence of electroactive sites and conductive substrate for facile charge transportation. Hence, this platform of MoS2 morphology directly grown on 3D NF substrate with excellent electrochemical properties can be utilized as a potential binder-free electrode for catalytic and electrochemical applications.

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IITH Creators:

IITH Creators	ORCiD
Gopalakrishnan, Arthi	UNSPECIFIED
Durai, Lignesh	UNSPECIFIED
Badhulika, Sushmee	orcid.org/0000-0003-3237-3031

Item Type:

Article

Uncontrolled Keywords:

Charge transportation; Conductive substrates; Electroactive surface areas; Electrochemical analysis; Electrochemical applications; Fuel cell application; Interfacial resistances; One-pot hydrothermal synthesis; Charge transfer; Electrooxidation; Fuel cells; Grain boundaries; Hydrogen evolution reaction; Hydrothermal synthesis; Layered semiconductors; Methanol; Molybdenum compounds; Morphology; Nanosheets

Subjects:

Electrical Engineering
Electrical Engineering > Instruments and Instrumentation

Divisions:

Department of Electrical Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

05 Jul 2021 09:39

Last Modified:

05 Jul 2021 09:39

URI:

http://raiithold.iith.ac.in/id/eprint/8108