Enhancement of Oxygen Reduction and Mitigation of Ionomer Dry-Out Using Insoluble Heteropoly Acids in Intermediate Temperature Polymer-Electrolyte Membrane Fuel Cells

被引：4

作者：

Stassi, Alessandro ^{[1
]}

Gatto, Irene ^{[1
]}

Sacca, Ada ^{[1
]}

Baglio, Vincenzo ^{[1
]}

Arico, Antonino S. ^{[1
]}

机构：

[1] CNR ITAE Inst Adv Energy Technol Nicola Giordano, I-98126 Messina, Italy

来源：

ENERGIES | 2015年 / 8卷 / 08期

关键词：

polymer electrolyte membrane fuel cell (PEMFC); heteropoly acids; Cs0; 5(H)0; 5(PW)12(O)40; intermediate temperature; oxygen reduction; PHOSPHOTUNGSTIC ACID; PERFORMANCE; CATALYSTS; ELECTROCATALYSTS; DEGRADATION; NANOPARTICLES;

D O I：

10.3390/en8087805

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The use of Cs0.5H0.5PW12O40 insoluble salt as a superacid promoter in the catalyst layer of a polymer electrolyte membrane fuel cell (PEMFC) has been investigated. An increase of performance has been recorded at intermediate temperatures (110-130 degrees C) and under low relative humidity (R.H.). The promoter appears to mitigate the ionomer dry-out effects in the catalytic layer and produces an increase of the extent of the catalyst-electrolyte interface as demonstrated by cyclic voltammetry analysis. These effects are also corroborated by a significant decrease of polarization resistance at intermediate temperatures. Such characteristics have been demonstrated for a conventional membrane-electrode assembly based on a Pt-Co alloy and a Nafion 115 membrane.

引用

页码：7805 / 7817

页数：13

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