Electro-oxidation of ethanol in acid medium using carbon-supported PtRh nanoparticles with (100) preferential orientation

被引：3
作者：
Pereira Filho, N. G. [1 ]
Souza, R. F. B. [1 ]
Ramos, A. S. [1 ]
Antoniassi, R. M. [1 ]
Neto, A. Oliveira [1 ]
Spinace, E., V [1 ]
机构：
[1] Inst Pesquisas Energet & Nucl IPEN CNEN SP, Av Prof Lineu Prestes 2242,Cidade Univ, BR-05508900 Sao Paulo, SP, Brazil
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2021年 / 16卷 / 12期
基金：
巴西圣保罗研究基金会;
关键词：
PtRh nanoparticles; (100) preferential orientation; electrocatalysts; ethanol; fuel cell; DEFC; C BOND-CLEAVAGE; FUEL-CELLS; OXIDATION; CORE; ELECTROCATALYSTS; CATALYST; HYDROGEN; RHODIUM;
D O I：
10.20964/2021.12.56
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Carbon-supported PtRh nanoparticles with preferential (100) orientation was prepared by an alcoholreduction process using KBr as a shape directing agent. The electrocatalysts were characterized by EDX (energy-dispersive X-ray analysis), XRD (X-ray diffraction) and TEM (Transmission electron microscopy). The electro-oxidation of ethanol was studied by cyclic voltammetry and chronoamperometry at room temperature in acid medium. On-line differential mass spectrometry experiments were performed on a single cell of a direct ethanol fuel cell (DEFC) at 60 C-0 and the anodic effluents were analyzed by ATR-FTIR. PtRh/C (100) electrocatalyst showed cubic-like morphology and average nanoparticles size of 8 nm and provided superior DEFC performance (density power per Pt active area) and CO2 selectivity compared to polycrystalline PtRh/C and commercial Pt/C electrocatalysts.
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页数：13
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