Direct dimethyl ether fuel cells with low platinum-group-metal loading at anode: Investigations of operating temperatures and anode Pt/Ru ratios

被引：19

作者：

Du, Lei ^{[1
,2
]}

Lou, Shuaifeng ^{[1
]}

Chen, Guangyu ^{[1
]}

Zhang, Gaixia ^{[2
]}

Kong, Fanpeng ^{[1
]}

Qian, Zhengyi ^{[1
]}

Du, Chunyu ^{[1
]}

Gao, Yunzhi ^{[1
]}

Sun, Shuhui ^{[2
]}

Yin, Geping ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Chem & Chem Engn, State Key Lab Urban Water Resource & Environm, Harbin 150001, Heilongjiang, Peoples R China

[2] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada

来源：

JOURNAL OF POWER SOURCES | 2019年 / 433卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Direct dimethyl ether fuel cell; Low PGM loading; Temperature; Anode catalyst; Rate determining step; ELECTROOXIDATION; CATALYST; DME; PERFORMANCE; OXIDATION; ELECTRODE;

D O I：

10.1016/j.jpowsour.2019.05.096

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 dimethyl ether fuel cell is a promising electricity generator due to its highly theoretical energy density, low toxicity, zero NOx and SOx emission, and low fuel crossover from anode to cathode. So far, tremendous investigations have been mainly focused on the development of highly active anode catalysts; while limited efforts were made on the comprehensive operation optimization, especially for the operating temperature and anode composition. Besides, the recent investigations usually used high Pt group metal loading at anode (>3.7 mg(PGM) cm(-2)), which is against the current tendency of decreasing Pt-based metal dosage. Herein, we particularly investigate the effects of operating temperatures and Pt/Ru ratios on the DDMEFC performance in a practical reactor with low anode PGM loading (1 mg(PGM) cm(-2)) using saturated DME aqueous solution as anode fuel. At 110 degrees C, the anode Pt1Ru1/C and Pt2Ru1/C catalysts demonstrate the superior current density of similar to 117 rnA cm(-2) and 145 mA cm(-2) at 0.5 V. Particularly, the high Pt/Ru ratios present better maximum power density than low Pt/Ru ratios at low temperatures, e.g. 80 degrees C, but inversely deliver worse performance at high temperatures. This interesting phenomenon is likely due to the temperature-dependent rate determining step transfer.

引用

页数：6

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