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Pd/MWCNTs catalytic activity in the formic acid electrooxidation dependent on catalyst surface treatment
Author(s) -
Mazurkiewicz Marta,
Malolepszy Artur,
Mikolajczuk Anna,
Stobinski Leszek,
Borodzinski Andrzej,
Lesiak Beata,
Zemek Josef,
Jiricek Petr
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201100173
Subject(s) - overlayer , x ray photoelectron spectroscopy , catalysis , formic acid , materials science , nanoparticle , carbon nanotube , palladium , chemical engineering , binding energy , chemistry , inorganic chemistry , nanotechnology , organic chemistry , engineering , physics , nuclear physics
The catalytic activity in the formic acid (HCOOH) electrooxidation reaction of the Pd multiwall carbon nanotubes (MWCNTs) supported catalyst, prepared by a microwave‐assisted polyol method, treated under different gas atmospheres, and temperatures (200 and 300 °C), was investigated. Their respective catalysts surface characterization proceeded in UHV using the electron spectroscopy methods. Content of constituents, i.e., Pd nanoparticles, C and O, was examined quantitatively. Content of Pd phases and chemical forms of C atoms was analyzed assuming respective binding energy (BE) values to Pd 3d and C 1s X‐ray photoelectron spectra (XPS) spectra fitted to Gaussian–Lorentzian components. Surface structure was examined from the 3D nanostructure analysis by quantitative analysis of surfaces by electron spectroscopy (QUASES). Catalytic activity of Pd/MWCNTs after various surface treatments was attributed to different surface content and forms of Pd nanoparticles, and PdO x /C overlayer morphology, coverage, and thickness.