CO-induced segregation as an efficient tool to control the surface composition and catalytic performance of PdAg3/Al2O3 catalyst

被引：19

作者：

Smirnova, Nadezhda S. ^{[1
]}

Markov, Pavel V. ^{[1
]}

Baeva, Galina N. ^{[1
]}

Rassolov, Alexander V. ^{[1
]}

Mashkovsky, Igor S. ^{[1
]}

Bukhtiyarov, Andrey V. ^{[2
]}

Prosvirin, Igor P. ^{[2
]}

Panafidin, Maxim A. ^{[2
]}

Zubavichus, Yan V. ^{[2
]}

Bukhtiyarov, Valerii I. ^{[2
]}

Stakheev, Alexander Yu. ^{[1
]}

机构：

[1] Russian Acad Sci, ND Zelinsky Inst Organ Chem, Moscow 119991, Russia

[2] Russian Acad Sci, Siberian Branch, GK Boreskov Inst Catalysis, Novosibirsk 630090, Russia

来源：

MENDELEEV COMMUNICATIONS | 2019年 / 29卷 / 05期

基金：

俄罗斯科学基金会; 俄罗斯基础研究基金会;

关键词：

LIQUID-PHASE HYDROGENATION; SINGLE-ATOM CATALYST; PD-AG CATALYSTS; SELECTIVE HYDROGENATION; PARTICLE-SIZE; NANOPARTICLES; ADSORPTION; ACETYLENE; DEACTIVATION; SEMIHYDROGENATION;

D O I：

10.1016/j.mencom.2019.09.023

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A treatment of PdAg3/Al2O3 catalyst with CO at 250 degrees C enhanced its activity towards the selective C2H2 hydrogenation without any noticeable losses of C2H4 selectivity. The CO-DRIFTS and XPS data acquired in situ have indicated that the observed effect arises from Pd surface segregation induced by the CO adsorption and partial transformation of isolated surface Pd-1 active sites into Pd-2 dimers. The catalytic performance of PdAg3/Al2O3 was found to be similar or even better as compared to the best reported catalysts.

引用

页码：547 / 549

页数：3

共 33 条

[1] Determination of the Particle Size, Available Surface Area, and Nature of Exposed Sites for Silica-Alumina-Supported Pd Nanoparticles: A Multitechnical Approach
Agostini, G.
Pellegrini, R.
Leofanti, G.
Bertinetti, L.
Bertarione, S.
Groppo, E.
Zecchina, A.
Lamberti, C.
[J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (24) : 10485 - 10492
[2] Adsorption-Driven Surface Segregation of the Less Reactive Alloy Component
Andersson, Klas J.
Calle-Vallejo, Federico
Rossmeisl, Jan
Chorkendorff, Lb
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (06) : 2404 - 2407
[3] Selective hydrogenation of ethyne in ethene-rich streams on palladium catalysts, Part 2: Steady-state kinetics and effects of palladium particle size, carbon monoxide, and promoters
Borodzinski, Andrzej
Bond, Geoffrey C.
[J]. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 2008, 50 (03): : 379 - 469
[4] In situ formation of the active sites in Pd-Au bimetallic nanocatalysts for CO oxidation: NAP (near ambient pressure) XPS and MS study
Bukhtiyarov, A. V.
Prosvirin, I. P.
Saraev, A. A.
Klyushin, A. Yu.
Knop-Gericke, A.
Bukhtiyarov, V. I.
[J]. FARADAY DISCUSSIONS, 2018, 208 : 255 - 268
[5] Supported metal catalysts at the single-atom limit - A viewpoint
Flytzani-Stephanopoulos, Maria
[J]. CHINESE JOURNAL OF CATALYSIS, 2017, 38 (09) : 1432 - 1442
[6] CO Oxidation over AuPd(100) from Ultrahigh Vacuum to Near-Atmospheric Pressures: CO Adsorption-Induced Surface Segregation and Reaction Kinetics
Gao, Fcng
Wang, Yilin
Goodman, D. Wayne
[J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (33) : 14993 - 15000
[7] Structure and reactivity of Pd doped Ag surfaces
Jaatinen, S
Salo, P
Alatalo, M
Kulmala, V
Kokko, K
[J]. SURFACE SCIENCE, 2003, 529 (03) : 403 - 409
[8] Overstabilization of the Metastable Structure of Isolated Ag-Pd Bimetallic Clusters
Kim, Hyun You
Kim, Hyoung Gyu
Kim, Da Hye
Lee, Hyuck Mo
[J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (44) : 17138 - 17142
[9] A new approach to well-defined, stable and site-isolated catalysts
Kovnir, K.
Armbruester, M.
Teschner, D.
Venkov, T. V.
Jentoft, F. C.
Knop-Gericke, A.
Grin, Yu.
Schloegl, R.
[J]. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2007, 8 (05) : 420 - 427
[10] Long-Time Stability vs Deactivation of Pd-Ag/Al2O3 Egg-Shell Catalysts in Selective Hydrogenation of Acetylene
Kuhn, Martin
Lucas, Martin
Claus, Peter
[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2015, 54 (26) : 6683 - 6691

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