Open AccessBenefits of mesopores in nanocristalline Pd/SnO2 catalysts for nitrate hydrogenation
Author(s) -
Marijana Kovacevic,
Erne Kiš,
Goran Bošković
Publication year - 2007
Publication title -
acta periodica technologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.134
H-Index - 15
eISSN - 2406-095X
pISSN - 1450-7188
DOI - 10.2298/apt0738069k
Subject(s) - mesoporous material , catalysis , citric acid , porosity , crystallite , chemical engineering , materials science , noble metal , specific surface area , nitrate , nanoscopic scale , phase (matter) , nuclear chemistry , inorganic chemistry , chemistry , nanotechnology , metallurgy , organic chemistry , composite material , engineering
Mesoporous nanocristalline SnO2 supports were synthesized by a modified sol-gel method starting from SnCl2·2H2O and citric acid at pH 2.0 and 9.5. Noble metal was introduced via wet impregnation using PdCl2 as active phase precursor. Catalysts activities in water denitration were correlated with their textural, structural and morphological properties using LTNA (BET), XRD and SEM/EDS analysis. Lower pH value during the catalyst synthesis resulted in a final material characterized with more developed porosity and higher surface area. Although both catalysts turned out to be tailored from nanoscale crystallites, higher pore fraction of mesopores resulting from the synthesis in acidic conditions, was found to be responsible for superior catalytic behavior
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