TY - JOUR
T1 - The influence of surface functionalization of activated carbon on palladium dispersion and catalytic activity in hydrogen oxidation
AU - Radkevich, V.Z.
AU - Senko, T.L.
AU - Wilson, K.
AU - Grishenko, L.M.
AU - Zaderko, A.N.
AU - Diyuk, V.Y.
PY - 2008/2/8
Y1 - 2008/2/8
N2 - Stone-fruit activated carbon (SAC) and modified versions containing acidic oxygen and basic nitrogen groups have been used to prepare palladium catalysts by wet impregnation. Carbon supports and catalysts are investigated by thermo-gravimetric analysis, TPD, oxygen chemisorption, TEM and XPS. The influence of the nature of the functional groups on the dispersion and oxidation state of palladium and its activity in hydrogen oxidation is investigated. Pd dispersion is found to increase with the basic strength of functional groups on the support. XPS reveals that introduction of amine groups in SAC results in an increased proportion of Pd0, resistant to re-oxidation. Palladium catalysts supported on activated carbon modified by diethylamine groups are found to exhibit the highest metal dispersion and greatest activity in hydrogen oxidation.
AB - Stone-fruit activated carbon (SAC) and modified versions containing acidic oxygen and basic nitrogen groups have been used to prepare palladium catalysts by wet impregnation. Carbon supports and catalysts are investigated by thermo-gravimetric analysis, TPD, oxygen chemisorption, TEM and XPS. The influence of the nature of the functional groups on the dispersion and oxidation state of palladium and its activity in hydrogen oxidation is investigated. Pd dispersion is found to increase with the basic strength of functional groups on the support. XPS reveals that introduction of amine groups in SAC results in an increased proportion of Pd0, resistant to re-oxidation. Palladium catalysts supported on activated carbon modified by diethylamine groups are found to exhibit the highest metal dispersion and greatest activity in hydrogen oxidation.
KW - activated carbon
KW - surface functional groups
KW - surface amine groups
KW - palladium supported catalysts
KW - hydrogen oxidation
KW - XPS
UR - http://www.scopus.com/inward/record.url?scp=38349076154&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2007.11.029
DO - 10.1016/j.apcata.2007.11.029
M3 - Article
AN - SCOPUS:38349076154
SN - 0926-860X
VL - 335
SP - 241
EP - 251
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
IS - 2
ER -