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Deposition of Pd/graphene aerogel on nickel foam as a binder-free electrode for direct electro-oxidation of methanol and ethanol
Tsang C.-H.A.3; Hui K.N.4; Hui K.S.2; Ren L.1
2014-11-14
Source PublicationJournal of Materials Chemistry A
ISSN20507496 20507488
Volume2Issue:42Pages:17986-17993
AbstractWe 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 (forward to backward peak current density ratio (I/I) of 3.11), and 874 A g (I/I 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. This journal is
DOI10.1039/c4ta03138e
URLView the original
Language英語
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Cited Times [WOS]:38   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.XiangTan University
2.Hanyang University
3.City University of Hong Kong
4.Pusan National University
Recommended Citation
GB/T 7714
Tsang C.-H.A.,Hui K.N.,Hui K.S.,et al. Deposition of Pd/graphene aerogel on nickel foam as a binder-free electrode for direct electro-oxidation of methanol and ethanol[J]. Journal of Materials Chemistry A,2014,2(42):17986-17993.
APA Tsang C.-H.A.,Hui K.N.,Hui K.S.,&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),17986-17993.
MLA Tsang C.-H.A.,et al."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(2014):17986-17993.
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