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Synthesis of bimetallic AuPt/CeO2 catalysts and their comparative study in CO oxidation under different reaction conditions. / Plyusnin, Pavel E.; Slavinskaya, Elena M.; Kenzhin, Roman M. и др.
в: Reaction Kinetics, Mechanisms and Catalysis, Том 127, № 1, 15.06.2019, стр. 69-83.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Synthesis of bimetallic AuPt/CeO2 catalysts and their comparative study in CO oxidation under different reaction conditions
AU - Plyusnin, Pavel E.
AU - Slavinskaya, Elena M.
AU - Kenzhin, Roman M.
AU - Kirilovich, Anastasiya K.
AU - Makotchenko, Evgeniya V.
AU - Stonkus, Olga A.
AU - Shubin, Yury V.
AU - Vedyagin, Aleksey A.
PY - 2019/6/15
Y1 - 2019/6/15
N2 - In the present work, ceria-supported Au–Pt catalyst with metal ratio 3:2 was prepared using a “single-source precursor” concept. The double complex salt [AuEn2]2[Pt(NO2)4]3·6H2O was used as such precursor. CeO2 of unique morphology with developed surface area (120 m2/g) obtained by urea precipitation technique was used as a support. According to XRD data, size of the alloyed Au–Pt particles was estimated to be less than 3 nm. It was shown that bimetallic Au–Pt system intensifies release of oxygen from the CeO2 lattice. The 0.5%Au2Pt3/CeO2 catalyst was comparatively studied in low temperature CO oxidation (simplified model reaction mixture) and under prompt thermal aging conditions (complex reaction mixture) with regard to monometallic reference samples 0.2%Au/CeO2 and 0.3%Pt/CeO2. The catalytic performance of the samples was found to be significantly dependent on the reaction and pre-treatment conditions. In the case of the bimetallic catalyst, reversible redistribution and enrichment of the nanoparticle surface with Pt or Au were shown to be the key factor defining the activity.
AB - In the present work, ceria-supported Au–Pt catalyst with metal ratio 3:2 was prepared using a “single-source precursor” concept. The double complex salt [AuEn2]2[Pt(NO2)4]3·6H2O was used as such precursor. CeO2 of unique morphology with developed surface area (120 m2/g) obtained by urea precipitation technique was used as a support. According to XRD data, size of the alloyed Au–Pt particles was estimated to be less than 3 nm. It was shown that bimetallic Au–Pt system intensifies release of oxygen from the CeO2 lattice. The 0.5%Au2Pt3/CeO2 catalyst was comparatively studied in low temperature CO oxidation (simplified model reaction mixture) and under prompt thermal aging conditions (complex reaction mixture) with regard to monometallic reference samples 0.2%Au/CeO2 and 0.3%Pt/CeO2. The catalytic performance of the samples was found to be significantly dependent on the reaction and pre-treatment conditions. In the case of the bimetallic catalyst, reversible redistribution and enrichment of the nanoparticle surface with Pt or Au were shown to be the key factor defining the activity.
KW - Bimetallic AuPt alloys
KW - CO oxidation
KW - Double complex salt
KW - Preparation
KW - Thermal stability
KW - GOLD
KW - PERFORMANCE
KW - PD-RH CATALYSTS
KW - METAL-SUPPORT INTERACTION
KW - ALLOY NANOPARTICLES
KW - PT/CEO2 CATALYSTS
KW - ALUMINA
KW - TEMPERATURE
KW - CARBON-MONOXIDE
KW - MOLECULARLY CHEMISORBED OXYGEN
UR - http://www.scopus.com/inward/record.url?scp=85060945255&partnerID=8YFLogxK
U2 - 10.1007/s11144-019-01545-5
DO - 10.1007/s11144-019-01545-5
M3 - Article
AN - SCOPUS:85060945255
VL - 127
SP - 69
EP - 83
JO - Reaction Kinetics, Mechanisms and Catalysis
JF - Reaction Kinetics, Mechanisms and Catalysis
SN - 1878-5190
IS - 1
ER -
ID: 18485483