Hybrid palladium-ceria nanorod electrocatalysts applications in oxygen reduction and ethanol oxidation reactions in alkaline media

被引：23
作者：
Pinheiro, Victor S. [1 ]
Souza, Felipe M. [1 ]
Gentil, Tuani C. [1 ]
Parreira, Luanna S. [1 ]
Batista, Bruno L. [1 ]
Santos, Mauro C. [1 ]
机构：
[1] Univ Fed ABC UFABC, Ctr Ciencias Naturais & Humanas CCNH, Lab Eletroquim & Mat Nanoestruturados LEMN, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP, Brazil
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 29期
基金：
巴西圣保罗研究基金会;
关键词：
Oxygen reduction reaction; Ethanol oxidation reaction; Alkaline direct ethanol fuel cells; Palladium; Ceria nanorods; Hybrid electrocatalysts; FUEL-CELL; CARBON NANOTUBES; CEO2; NANORODS; CATALYST; ELECTROOXIDATION; NANOPARTICLES; PERFORMANCE; ENHANCEMENT; FABRICATION; STABILITY;
D O I：
10.1016/j.ijhydene.2021.02.056
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Fossil fuel alternatives are being increasingly studied, and alkaline direct ethanol fuel cells (ADEFC) have acquired importance, as to ethanol is a renewable fuel. In this context, the aims of the present study were to synthesize, characterize and evaluate electrocatalytic activity in oxygen reduction reaction (ORR) and ethanol oxidation reaction (EOR) using hybrid electrocatalysts based on Pd nanoparticles and CeO2 nanorods supported on carbon black for application in ADEFC. The highest OCV, maximum current and power densities obtained using Pd-15(CeO2 NR)(10)(Vn)(75) as the cathode and Pd-10(CeO2 NR)(20)(Vn)(70) as the anode were 1270 mV, 190 mA cm(-2) and 65 mW cm(-2), respectively. These interesting results are justified by the highest ID/IG ratio and ECSA, which suggest a high number of oxygenated species, defects and vacancies in these electrocatalysts and by the synergistic effect between CeO2 NR and Pd nanoparticles. Therefore, these hybrid electrocatalysts are promising for ADEFC applications. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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页码：15896 / 15911
页数：16
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