Premium
Oxygen‐Plasma‐Functionalized Carbon Nanotubes as Supports for Platinum–Ruthenium Catalysts Applied in Electrochemical Methanol Oxidation
Author(s) -
Chetty Raghuram,
Maniam Kranthi Kumar,
Schuhmann Wolfgang,
Muhler Martin
Publication year - 2015
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402192
Subject(s) - chronoamperometry , chemistry , ruthenium , cyclic voltammetry , platinum , raman spectroscopy , catalysis , carbon nanotube , x ray photoelectron spectroscopy , platinum nanoparticles , inorganic chemistry , electrochemistry , methanol , chemical engineering , nanotechnology , materials science , organic chemistry , electrode , physics , engineering , optics
Multiwalled carbon nanotubes (CNTs) functionalized by oxygen plasma were used as a support for platinum–ruthenium nanoparticles for electrochemical methanol oxidation. The influence of plasma treatment time on the electrocatalytic activity was investigated by cyclic voltammetry, CO stripping voltammetry, and chronoamperometry. The electrocatalysts were characterized by Raman spectroscopy, X‐ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and X‐ray diffraction. The results showed that oxygen plasma treatment led to the formation of CO and COO groups on the CNT surface. Platinum–ruthenium nanoparticles dispersed with an optimum plasma treatment time of 30 min exhibited the maximum catalytic activity towards methanol oxidation. The rationale for the high catalytic activity is discussed.