Эффект «скатывания» платинового слоя, полученного на поверхности никеля при взаимодействии с раствором H₂PtCl₆, и его электрокаталитические свойства в реакции выделения водорода при электролизе воды в щелочной среде

Впервые показано, что слой платины получен на поверхности никелевой фольги в результате реакции гальванического замещения (ГРЗ) при взаимодействии с водным раствором H₂PtCl₆, при сушке на воздухе, частично свернут в неполностью сформированные микросвитки с уникальной трехмерной морфологией. Анализ стенки этих микросвитков методами FESEM, TEM, HR-TEM и SAED показал, что они пористые и образованы нанокристаллами платины размером 5‒10 нм, а плотность их упаковки по толщине стенки различается. Образцы никелевой фольги с нанесенным на их поверхность слоем микросвитков платины проявляют высокую электрокаталитическую активность в реакции выделения водорода (ВВР) при электролизе воды в щелочной среде. В частности, для электрода с платиновым слоем толщиной 120‒140 нм величина перенапряжения составляет 32 мВ, а тафелевская крутизна 32.5 мВ/дек.

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