Активность и стабильность PtCo/С электрокатализаторов окисления спиртов
Аннотация
Данное исследование рассматривает жидкофазный синтез PtCo/С катализаторов с различной массовой долей металлов и соотношением Pt:Co на основе СoOx/С композитных носителей. Цель статьи – изучить активность в реакциях окисления метанола и этанола PtCo/С электрокатализаторов различного состава и сравнить их характеристики с коммерческими PtRu/C и Pt/C аналогами.
Синтезированы PtCo/С катализаторы с соотношением Pt:Co – 1:1 и 3:1. Определена величина удельной активной поверхности полученных PtCo/С материалов, изучена их активность в реакциях окисления метанола и этанола, устойчивость к отравлению промежуточными продуктами окисления спиртов. Структурные и электрохимические характеристики полученных PtCo/С катализаторов были изучены методами рентгеновской дифракции, циклической вольтамперометрии и хроноамперометрии. Было установлено, что PtCo/С материалы с массовой долей платины
близкой к 20 % демонстрируют наибольшую активности и стабильность, по сравнению с коммерческими PtRu/C и Pt/C аналогами.
Представленные результаты показывают перспективность использования PtCo/С катализаторов в прямых спиртовых топливных элементах.
Скачивания
Литература
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