Performance of direct ammonia fuel cell with PtIr/C, PtRu/C, and Pt/C as anode electrocatalysts under mild conditions

被引：41
作者：
Chen, Riyi [1 ]
Zheng, Songsheng [1 ]
Yao, Yudong [1 ]
Lin, Zhibin [1 ]
Ouyang, Wei [1 ]
Zhuo, Lianghui [1 ]
Wang, Zhaolin [1 ]
机构：
[1] Xiamen Univ, Coll Energy, Xiamen 361102, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 54期
基金：
中国国家自然科学基金;
关键词：
Direct ammonia fuel cell; Anode electrocatalyst; Ammonia oxidation; Hydrogen carrier; STAINLESS-STEEL; TEMPERATURE; OXIDATION; HYDROGEN; IR;
D O I：
10.1016/j.ijhydene.2021.06.001
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：
While ammonia (NH3) is an attractive alternative to pure hydrogen, its direct use in fuel cells is fraught with difficulties. A direct ammonia fuel cell (DAFC) with PtIr/C (Pt:Ir = 1:1), PtRu/C (Pt:Ru = 1:1), and Pt/C anode electrocatalyst was investigated at 25 degrees C and 100 kPa inlet gas pressure. Due to the synergistic and electronic effects of the PtIr alloy, their open-circuit voltages (OCVs) were rated as PtIr/C > PtRu/C > Pt/C, with the DAFC with PtIr/C anode achieving the highest OCV of 0.50 V and peak power density (PPD) of maximum 1.68 mW cm-2. Meanwhile, an online Fourier transform infrared (FTIR) spectrometer detected an increase in ammonia permeation in the cathode exhaust gas, indicating a possibility of fuel permeation and cathode electrocatalyst degradation. The degradation of DAFC efficiency with rising cycle numbers may be due to ammonia crossover and poisoning over the surface of the electrocatalyst. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：27749 / 27757
页数：9
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