Novel palladium-guanine-reduced graphene oxide nanocomposite as efficient electrocatalyst for methanol oxidation reaction

Ng, Jen Chao and Tan, Chou Yong and Ong, Boon Hoong and Matsuda, Atsunori and Basirun, Wan Jefrey and Tan, Wai Kian and Ramesh, Singh and Yap, Boon Kar (2019) Novel palladium-guanine-reduced graphene oxide nanocomposite as efficient electrocatalyst for methanol oxidation reaction. Materials Research Bulletin, 112. pp. 213-220. ISSN 0025-5408

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Official URL: https://doi.org/10.1016/j.materresbull.2018.12.029

Abstract

The agglomeration of metal catalysts can limit the performance of fuel cells. Herein, an easy, scalable, one-pot microwave-assisted method is proposed to introduce guanine, which is a nucleobase found in deoxyribonucleic acid and ribonucleic acid, to the reduced graphene oxide-supported palladium via noncovalent functionalization. Considering the abundant amino, amide, and imino functional groups of guanine that act as anchoring sites, palladium nanoparticles of various shapes such as triangular, rectangular, circular, and diamond are uniformly distributed. The guanine itself is revealed to be catalytically active toward methanol oxidation reaction, serving as second catalyst. Consequently, the as-produced nanocomposite has a larger electrochemically active surface area (111.98 m2 g−1 vs. 63.80 m2 g−1), greater methanol electro-oxidation ability (1017.42 mA mg−1 vs. 359.80 mA mg−1), and higher stability in alkaline medium than its counterpart without guanine.

Item Type: Article
Uncontrolled Keywords: A. Graphene; A. Palladium nanoparticles; A. Guanine; B. Noncovalent functionalization; D. Methanol oxidation reaction
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Faculty of Science > Dept of Chemistry
Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 17 Jan 2019 01:31
Last Modified: 17 Jan 2019 01:31
URI: http://eprints.um.edu.my/id/eprint/20020

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