Deposition of Pd/graphene aerogel on nickel foam as a binder-free electrode for direct electro-oxidation of methanol and ethanol

Tsang, Chi-Him A., Hui, K. N., Hui, K.S. ORCID: https://orcid.org/0000-0001-7089-7587 and Ren, L. (2014) Deposition of Pd/graphene aerogel on nickel foam as a binder-free electrode for direct electro-oxidation of methanol and ethanol. Journal of Materials Chemistry A, 2 (42). pp. 17986-17993. ISSN 2050-7488

Full text not available from this repository.

Abstract

We reported a simple and green method to fabricate various palladium (0.8, 2.17, 7.65 wt%) loaded graphene aerogel deposited on nickel foam (Pd/GA/NF) as binder-free direct electrodes for electro-oxidation of methanol and ethanol. l-Ascorbic acid (vitamin C, VC) was used as a reducing agent in the process under a mild temperature of 40 °C. The morphology, chemical composition, and electrochemical performance of the prepared electrodes were characterized by optical microscopy, SEM/EDX, TEM, XRD, XPS, XRF, and cyclic voltammetry (CV), respectively. The XPS results revealed that both graphene oxide and Pd ions were simultaneously reduced by VC. The CV analysis revealed that the 7.65 wt% Pd/GA/NF electrode showed a maximum peak current density of 798.8 A g-1 (forward to backward peak current density ratio (If/Ib) of 3.11), and 874 A g-1 (If/Ib of 2.72) in methanol and ethanol electro-oxidation, respectively. The catalytic performance of the electrodes was enhanced with increasing the Pd loading. The results indicated that the 7.65 wt% Pd/GA/NF electrode exhibited a good electrocatalytic activity and an outstanding stability for alcohol electro-oxidation. The prolong CV scanning study (over 1000 cycles) showed that the 7.65 wt% Pd/GA/NF electrode achieved a better overall performance and stability in ethanol oxidation compared to methanol oxidation. The proposed electrode preparation method has a great potential for preparing various binder-free catalytic electrodes, which would be beneficial to the development of fuel cell application.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Mathematics (former - to 2024)
UEA Research Groups:	Faculty of Science > Research Groups > Energy Materials Laboratory
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	Pure Connector
Date Deposited:	24 Sep 2016 00:53
Last Modified:	25 Sep 2024 12:12
URI:	https://ueaeprints.uea.ac.uk/id/eprint/60257
DOI:	10.1039/c4ta03138e

Actions (login required)

View Item