Manganese oxide coated TiO2 nanotube-based electrode for efficient and selective electrocatalytic sulfide oxidation to colloidal sulfur

نویسندگان

چکیده

Manganese oxide-coated TiO2 nanotube array (NTA) was synthesized and applied for the (electro) catalytic oxidation of sulfide. By setting electrodeposition parameters calcination temperature, coating obtained MnO2 or Mn2O3, with rod needle like morphology. Excellent activity Ti/TiO2 NTA/MnxOy anodes resulted in robust selective sulfide to elemental sulfur via an inner sphere complex between ion Mn-oxide. The penetration MnxOy inside NTA improved adhesion enhanced electron transfer, thus enabling complete rapid electrocatalytic re-oxidation Mn-oxide coating. At pH 8, final product colloidal sulfur, S8, which prevented anode passivation enabled a stable subsequent applications. This observed both synthetic electrolyte real sewage, demonstrating efficiency waste streams.

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ژورنال

عنوان ژورنال: Applied Catalysis B-environmental

سال: 2021

ISSN: ['1873-3883', '0926-3373']

DOI: https://doi.org/10.1016/j.apcatb.2021.120383