Fast and Inexpensive Synthesis of Multilayer Graphene Used as Pd Support in Alkaline Direct Ethanol Fuel Cell Anode

Author(s)

Souza, Felipe M. ^[1] ; Lima, Thays S. ^[2] ; Bohnstedt, Paula ^[1] ; Pinheiro, Victor S. ^[1] ; Batista, Bruno L. ^[1] ; Parreira, Luanna S. ^[1] ; Simoes, Fabio R. ^[3] ; Codognoto, Lucia ^[2] ; Hammer, Peter ^[4] ; Santos, Mauro C. ^[1]

Affiliation

^[1] Univ Fed ABC UFABC, Ctr Ciencias Nat & Humanas CCNH, Lab Eletroquim & Mat Nanoestruturados LEMN, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP - Brazil

^[2] Univ Fed Sao Paulo UNIFESP, Inst Ciencias Quim & Farmaceut, Dept Quim, Rua Prof Artur Riedel 275, BR-09972270 Diadema, SP - Brazil

^[3] Univ Fed Sao Paulo UNIFESP, Inst Mar, Rua Carvalho de Mendonca 144, BR-11070100 Santos, SP - Brazil

^[4] Univ Estadual Paulista UNESP, Inst Quim Araraquara, Dept Fis Quim, BR-14800900 Araraquara, SP - Brazil

• Document type: Journal article
• Source: ELECTROCATALYSIS; v. 12, n. 6 SEP 2021.
• Web of Science Citations: 0

Abstract

Multilayer graphene (G-US) and multilayer graphene muffled (Gm-US) produced by liquid exfoliation ultrasound were used as support for Pd nanoparticles with a load of 20 wt% for application in an alkaline direct ethanol fuel cell (ADEFC) anode. The multilayer graphene-based electrocatalyst (Pd/G-US) exhibited superior current density and less positive onset potential for ethanol oxidation reaction (EOR) than the commercial Pd/C (AA). Also, the Pd/G-US electrocatalyst showed the less positive onset potential for CO oxidation. In ADEFC experiments, the Pd/G-US catalyst exhibited a superior performance with 38 mW cm(-2). The findings suggest that the defective graphene structure promotes electron transport, and the presence of oxygenated species increases hydrophilicity facilitating the oxidation of intermediates. Hence, the synthesized material can be considered as promising support for an anode in ADEFC. (AU)

• FAPESP's process: 17/21846-6 - Nanostructures for environmental remediation and power generation from renewable sources
• Grantee: Mauro Coelho dos Santos
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
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• Grantee: Mauro Coelho dos Santos
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/22976-0 - Development of palladium and niobium nanoelectrocatalysts for alkaline direct ethanol fuel cells
• Grantee: Felipe de Moura Souza
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/24742-7 - Sensors based on composites of conducting polymers and graphene aiming the determination of endocrine disruptor substances in marine environment
• Grantee: Fabio Ruiz Simões
• Support Opportunities: Regular Research Grants
• FAPESP's process: 20/14100-0 - Sodium niobate electrodes decorated with WO3 and CeO2 for degradation of the organophosphate pesticide acephate by advanced oxidative electrochemical processes
• Grantee: Felipe de Moura Souza
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/26307-9 - Development of Pd and Nb electrocatalysts for application in fuel cells and degradation of organic pollutants
• Grantee: Paula Böhnstedt
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 17/26288-1 - Hybrid electrocatalysts based on Pd, Pt and Sn nanoparticles, and on ceria nanorods for application in fuel cells
• Grantee: Victor dos Santos Pinheiro
• Support Opportunities: Scholarships in Brazil - Doctorate