Catalytic composition and fuel influence on anodic processes characteristics of solid polymer electrolyte fuel cells

It was studied an influence of prior carbon treatment (temperature and gas conditions, mass content of waterproofing agent) on activity of platinum catalyst, synthesized on disperse carbon carrier. It was shown that characteristics of anodic processes depend on quantity of solid polymer electrolyte in catalytic composition. Optimal content of ion exchange polymer under varied degree of carbon carrier waterproofing (used for synthesis of platinum catalyst) is not equal. In a case of platinum catalyst synthesized on a base of carbon carrier with the addition of waterproofing agent (10 mass %), the highest current density of fuel cell functioning on pure oxygen corresponds to 15-20 mass % of polymer content in a layer and in a case of air – 10-15 mass %. Impurity of carbonic gas in anodic fuel leads to decrease of current density on fuel cell withdrawal not only because of partial pressure decrease. The reason of parameter worsening is partial platinum poisoning with CO, appearing after CO₂ reduction.

Authors:

Kuleshov Nikolai Vasil'evich, National Research University "MEI", 14, Krasnokazarmennaya St., Moscow, 111250, KuleshovNV@mail.ru

Grigor'ev Sergei Aleksandrovich, National Research Center "Kurchatov Institute", 1, square of the academician Kurchatov, Moscow, 123182, S.Grigoriev@hepti.kiae.ru

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Journal issue:

2008. Т. 8, № 1,