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Электрохимия, 2023, T. 59, № 12, стр. 814-823

Влияние термообработки на структуру и функциональные характеристики PtCo/C-катализатора

А. К. Невельская a, b, *, С. В. Беленов a, **, Н. В. Топорков a, А. Ю. Никулин a, b

a Южный федеральный университет
Ростов-на-Дону, Россия

b Федеральный исследовательский центр, Южный научный центр Российской академии наук (ЮНЦ РАН)
Ростов-на-Дону, Россия

* E-mail: alina_nevelskaya@mail.ru
** E-mail: serg1986chem@mail.ru

Поступила в редакцию 09.06.2022
После доработки 27.03.2023
Принята к публикации 10.04.2023

Аннотация

PtCo/C-электрокатализатор, полученный методом одновременного восстановления прекурсоров металлов с использованием боргидрида натрия, был обработан при температуре 350°C в атмосфере аргона в течение 1 ч. Результаты рентгенофазового анализа и просвечивающей электронной микроскопии указывают на увеличение среднего размера кристаллитов и образование агломератов наночастиц после термической обработки. Сдвиг максимумов отражений Pt после обработки говорит о возможной сегрегации металлических компонентов в ходе нагревания образца. Показано увеличение активности катализатора после термической обработки – как массовой (в расчете на массу платины), так и удельной (в расчете на площадь поверхности платины). Остаточная активность образца после термообработки, по результатам стресс-теста, в диапазоне потенциалов 0.6–1.4 В показала более высокое значение, чем материала в состоянии “как получено”.

Ключевые слова: электрокатализатор, биметаллические наночастицы, термическая обработка, реакция электровосстановления кислорода, стабильность

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