NaNbO3 microcubes decorated with minimum Pd and maximum performance for Alkaline Direct Ethanol Fuel Cell applications

Author(s)

Souza, Felipe M. ^[1] ; Pinheiro, Victor S. ^[1] ; Gentil, Tuani C. ^[1] ; Batista, Bruno L. ^[1] ; Parreira, Luanna S. ^[1] ; Santos, Mauro C. ^[1]

Affiliation

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

• Document type: Journal article
• Source: Journal of Power Sources; v. 493, MAY 1 2021.
• Web of Science Citations: 0

Abstract

NaNbO3 microcubes with Pd for application in an Alkaline Direct Ethanol Fuel Cell (ADEFC) anode with high performance and minimal amounts of Pd are investigated herein. The Pd heterostructure on NaNbO3 is evaluated in two different structures NaNbO3?Pd/C and NaNbO3@Pd/C. NaNbO3?Pd/C electrocatalyst presents a less positive Eonset for CO-stripping. The NaNbO3?Pd/C electrocatalyst exhibits lower Pd and Nb mass losses compared to NaNbO3@Pd/C during the 24-h experiment. A single ADEFC experiment has 18 mW cm-2 at 50 and 60 ?C using only 0.16 mg cm-2 of Pd for NaNbO3?Pd/C production. This Pd metallic loading is 6-fold lower than that of commercial Pd/C (AA). Experimental evidence indicates that the electronic effect between Pd and Nb and the high EASA are the likely reasons for these findings. Therefore, NaNbO3 microcubes with Pd may be an advantageous electrocatalyst for applications in ADEFC anodes. (AU)

• FAPESP's process: 18/18675-8 - Nanostructured electrocatalysts based on PT, PD and oxides of low cost for applications in energy and environment
• Grantee: Tuani Carla Gentil
• Support Opportunities: Scholarships in Brazil - Doctorate
• 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: 17/21846-6 - 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
• 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: 15/10314-8 - Nanostructures for Phenol, Ciprofloxacin and 17±-ethinylestradiol Degradation
• Grantee: Mauro Coelho dos Santos
• Support Opportunities: Regular Research Grants