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
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
收藏
页码:547 / 549
页数:3
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