Synthesis and Characterization of 3-DOM IrO2 Electrocatalysts Templated by PMMA for Oxygen Evolution Reaction

Autor:	Xuechu Sun, Haolin Tang, Jun Yu, Cuicui Li, Fei Liu, Xiu Chen
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	Materials science Polymers and Plastics Electrolysis of water IrO2 catalyst Oxygen evolution chemistry.chemical_element General Chemistry Overpotential water electrolysis Article Catalysis lcsh:QD241-441 Chemical engineering chemistry X-ray photoelectron spectroscopy lcsh:Organic chemistry Rutile OER PMMA template Iridium Mesoporous material
Zdroj:	Polymers, Vol 11, Iss 4, p 629 (2019) Polymers Volume 11 Issue 4
ISSN:	2073-4360
Popis:	Three-dimensional ordered macroporous (3-DOM) IrO2 material was prepared using PMMA as a template and ammonia as a chelator. These 3-DOM IrO2 honeycomb arrays showed a large surface area and ordered macropores (155 nm in diameter) cross-linked by secondary mesopores. Internal structures of 3-DOM IrO2 material were observed microscopically through these secondary pores. According to the X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) spectra, 3-DOM IrO2 has a rutile crystal structure and is mainly composed of iridium dioxide. In acidic electrolytes, the overpotential of 3-DOM IrO2 material at 0.5 mV cm&minus 2 was only 0.22 V. Accelerated durability tests demonstrated excellent durability of 3-DOM IrO2 as an oxygen evolution reaction (OER) catalyst.
Databáze:	OpenAIRE
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