Direct ammonia fuel cell performance using PtIr/C as anode electrocatalysts
Direct ammonia fuel cell performance using PtIr/C as anode electrocatalysts
复制标题
DOI：
10.1016/j.ijhydene.2014.01.053
复制
发表时间：
2014-03-26
影响因子：
7.2
通讯作者：
Silva, Julio Cesar M.
中科院分区：
文献类型：
--
作者：
Assumpcao, Monica H. M. T.;da Silva, Sirlane G.;Silva, Julio Cesar M.
以硼氢化物还原法制备PtIr/C电催化剂（Pt:Ir原子比分别为50:50、70:30、80:20和90:10）为阳极，以KOH 1.0 mol L-1中的NH4OH 1.0、3.0和5.0 mol L-1为燃料，研究了直接氨燃料电池（DAFC）的性能。对PtIr/C电催化剂的x射线分析表明形成了PtIr合金，透射电镜显示平均粒径在4.5 ~ 6.0 nm之间。使用PtIr/C 50:50的电催化剂和在KOH 1.0 mol L-1条件下使用NH4OH 5.0 mol L-1的电催化剂，在40℃下获得的最大功率密度分别比Pt/C和Ir/C电催化剂高48%和70%。PtIr/C电催化剂电活性的提高可能与减少N-ads对催化剂表面的毒害和改善氨氧化反应动力学有关。版权所有(c) 2014，氢能源出版有限责任公司由爱思唯尔有限公司出版。保留所有权利。
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.