Direct ammonia fuel cell performance using PtIr/C as anode electrocatalysts

被引：100
作者：
Assumpcao, Monica H. M. T. [1 ]
da Silva, Sirlane G. [1 ]
de Souza, Rodrigo F. B. [1 ]
Buzzo, Guilherme S. [1 ]
Spinace, Estevam V. [1 ]
Neto, Almir O. [1 ]
Silva, Julio Cesar M. [1 ]
机构：
[1] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, BR-05508900 Sao Paulo, Brazil
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 10期
基金：
巴西圣保罗研究基金会;
关键词：
Direct ammonia fuel cell; PtIr/C; Electrocatalysts; ANION-EXCHANGE MEMBRANE; ETHANOL ELECTROOXIDATION; ALKALINE-MEDIUM; NANOPARTICLES; OXIDATION; IR; PD;
D O I：
10.1016/j.ijhydene.2014.01.053
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：
Direct ammonia fuel cell (DAFC) performance was investigated using as anode PtIr/C electrocatalysts (Pt:Ir atomic ratios of 50:50, 70:30, 80:20 and 90:10) prepared by the borohydride reduction process and NH4OH 1.0, 3.0 and 5.0 mol L-1 in KOH 1.0 mol L-1 as fuel. Xray analyses of PtIr/C electrocatalysts suggested the formation of PtIr alloy and the transmission electron micrographs showed the average particle diameters between 4.5 and 6.0 nm. Using PtIr/C 50:50 electrocatalyst and NH4OH 5.0 mol L-1 in KOH 1.0 mol L-1 at 40 C a maximum power density was 48% and 70% higher than that obtained using Pt/C and Ir/C electrocatalysts, respectively. The increase of electroactivity using PtIr/C electrocatalysts might be related to a decrease of poisoning on catalyst surface by N-ads species and to an improved kinetic for ammonia oxidation reaction. Copyright (c) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reeerved.
引用
收藏
页码：5148 / 5152
页数：5
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