Design Rules for Oxygen Evolution Catalysis at Porous Iron Oxide Electrodes: A 1000-Fold Current Density Increase

Sandra Haschke, Dmitrii Pankin, Yuri Petrov, Sebastian Bochmann, Alina Manshina, Julien Bachmann

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

20 Цитирования (Scopus)

Аннотация

Nanotubular iron(III) oxide electrodes are optimized for catalytic efficiency in the water oxidation reaction at neutral pH. The nanostructured electrodes are prepared from anodic alumina templates, which are coated with Fe2O3 by atomic layer deposition. Scanning helium ion microscopy, X-ray diffraction, and Raman spectroscopy are used to characterize the morphologies and phases of samples submitted to various treatments. These methods demonstrate the contrasting effects of thermal annealing and electrochemical treatment. The electrochemical performances of the corresponding electrodes under dark conditions are quantified by steady-state electrolysis and electrochemical impedance spectroscopy. A rough and amorphous Fe2O3 with phosphate incorporation is critical for the optimization of the water oxidation reaction. For the ideal pore length of 17 μm, the maximum catalytic turnover is reached with an effective current density of 140 μA cm−2 at an applied overpotential of 0.49 V.

Язык оригиналаанглийский
Страницы (с-по)3644-3651
Число страниц8
ЖурналChemSusChem
Том10
Номер выпуска18
DOI
СостояниеОпубликовано - 22 сен 2017

Предметные области Scopus

  • Химия окружающей среды
  • Химическая технология (все)
  • Материаловедение (все)
  • Энергия (все)

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