Nanoporous water oxidation electrodes with a low loading of laser-deposited Ru/C exhibit enhanced corrosion stability

Sandra Haschke, Dmitrii Pankin, Vladimir Mikhailovskii, Maïssa K.S. Barr, Adriana Both-Engel, Alina Manshina, Julien Bachmann

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

3 Цитирования (Scopus)

Аннотация

For the oxidation of water to dioxygen, oxide-covered ruthenium metal is known as the most efficient catalyst, however, with limited stability. Herein, we present a strategy for incorporating a Ru/C composite onto a novel nanoporous electrode surface with low noble metal loading and improved stability. The Ru/C is coated on the pore walls of anodic alumina templates in a one-step laser-induced deposition method from Ru3(CO)12 solutions. Scanning electron microscopy proves the presence of a continuous Ru/C layer along the inner pore walls. The amorphous material consists of metallic Ru incorporated in a carbonaceous C matrix as shown by X-ray diffraction combined with Raman and X-ray photoelectron spectroscopies. These porous electrodes reveal enhanced stability during water oxidation as compared to planar samples at pH 4. Finally, their electrocatalytic performance depends on the geometric parameters and is optimized with 13 μm pore length, which yields 2.6 mA cm-2, or 49 A g-1, at η = 0.20 V.

Язык оригиналаанглийский
Страницы (с-по)157-167
Число страниц11
ЖурналBeilstein Journal of Nanotechnology
Том10
Номер выпуска1
DOI
СостояниеОпубликовано - 11 янв 2019

Предметные области Scopus

  • Физика и астрономия (все)
  • Материаловедение (все)
  • Электротехника и электроника

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