A Pt-free graphenaceous composite as an electro-catalyst for efficient oxygen reduction reaction

Bathinapatla Sravani; H. Maseed; Chandrasekhar Y.; Veera Manohara Reddy Y.; Srikanth V. V. S. S.; G. Madhavi; Subramanyam Sarma L.

doi:10.1039/C9NR02912E

A Pt-free graphenaceous composite as an electro-catalyst for efficient oxygen reduction reaction

Bathinapatla Sravani,

†^a H. Maseed,†^b Chandrasekhar Y.,^b Veera Manohara Reddy Y.,

^c Srikanth V. V. S. S.,

*^b G. Madhavi

^c and Subramanyam Sarma L.

*^a

Author affiliations

* Corresponding authors

^a Nanoelectrochemistry Laboratory, Department of Chemistry, Yogi Vemana University, Kadapa – 516 005, Andhra Pradesh, India
E-mail: sarma7@yogivemanauniversity.ac.in

^b School of Engineering Sciences and Technology, University of Hyderabad, Gachibowli, Hyderabad – 500 046, Telangana, India
E-mail: vvsssse@uohyd.ernet.in

^c Electrochemical Research Laboratory, Department of Chemistry, Sri Venkateswara University, Tirupati – 517 502, Andhra Pradesh, India

Abstract

Use of Pt-based electro-catalysts for the oxygen reduction reaction (ORR) is a major hindrance in large-scale application of proton exchange membrane fuel cells (PEMFCs). Hence, new, cost-effective and high performance electro-catalysts are required for the commercial success of PEMFCs. In this work, a Pt-free magnesium oxide (MgO) decorated multi-layered reduced graphene oxide (MLGO) composite is tested as an electro-catalyst for the ORR. The ORR activity of MgO/MLGO in terms of diffusion-controlled current density is found to be superior (6.63 mA per cm²-geo) than that of in-house prepared Pt/rGO (5.96 mA per cm²-geo) and commercial Pt/C (5.02 mA per cm²-geo). The applicability of less expensive MgO/MLGO not only provides a new electro-catalyst but also provides a new direction in exploring metal oxide-based electro-catalysts for the ORR.

This article is part of the themed collection: Nanocarbons

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https://doi.org/10.1039/C9NR02912E

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Paper

Submitted

28 رجب 1440

Accepted

14 شوال 1440

First published

14 شوال 1440

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Nanoscale, 2019,11, 13300-13308

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A Pt-free graphenaceous composite as an electro-catalyst for efficient oxygen reduction reaction

B. Sravani, H. Maseed, C. Y., V. M. R. Y., S. V. V. S. S., G. Madhavi and S. S. L., Nanoscale, 2019, 11, 13300 DOI: 10.1039/C9NR02912E

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A Pt-free graphenaceous composite as an electro-catalyst for efficient oxygen reduction reaction

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