scholarly journals Strong metal-support interactions induced by an ultrafast laser

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jian Zhang ◽  
Dezhi Zhu ◽  
Jianfeng Yan ◽  
Chang-An Wang
Keyword(s):  
Noble Metal ◽  
Surface Defects ◽  
Effective Means ◽  
Co Adsorption ◽  
Metal Catalysts ◽  
Ultrafast Laser ◽  
Supported Metal Catalysts ◽  
Oxide Supports ◽  
Metal Support ◽  
Metal Support Interactions

AbstractSupported metal catalysts play a crucial role in the modern industry. Constructing strong metal-support interactions (SMSI) is an effective means of regulating the interfacial properties of noble metal-based supported catalysts. Here, we propose a new strategy of ultrafast laser-induced SMSI that can be constructed on a CeO2-supported Pt system by confining electric field in localized interface. The nanoconfined field essentially boosts the formation of surface defects and metastable CeOx migration. The SMSI is evidenced by covering Pt nanoparticles with the CeOx thin overlayer and suppression of CO adsorption. The overlayer is permeable to the reactant molecules. Owing to the SMSI, the resulting Pt/CeO2 catalyst exhibits enhanced activity and stability for CO oxidation. This strategy of constructing SMSI can be extended not only to other noble metal systems (such as Au/TiO2, Pd/TiO2, and Pt/TiO2) but also on non-reducible oxide supports (such as Pt/Al2O3, Au/MgO, and Pt/SiO2), providing a universal way to engineer and develop high-performance supported noble metal catalysts.

scholarly journals Correlation between TiO2 encapsulation layer on Pt and its electrochemical behavior

2021 ◽  
Author(s):  
Raquel Aymerich Armengol ◽  
Joohyun Lim ◽  
Marc Ledendecker ◽  
Katharina Hengge ◽  
Christina Scheu
Keyword(s):  
Electrochemical Behavior ◽  
Structural Features ◽  
Metal Catalysts ◽  
Supported Metal Catalysts ◽  
Metal Support ◽  
Metal Support Interactions ◽  
Systematic Synthesis ◽  
Supported Metal

Supported metal catalysts with partial encapsulation resulting from strong metal-support interactions show distinctive structural features which strongly affect their functionalities. Yet, challenges in systematic synthesis and in-depth characterization for such...

scholarly journals Strong metal–support interaction of Ru on TiO2 derived from the co-reduction mechanism of RuxTi1−xO2 interphase

2021 ◽  
Author(s):  
Yaru Zhang ◽  
Haifeng Qi ◽  
Xiong Su ◽  
Yang Su ◽  
Xiao Yan Liu ◽  
...  
Keyword(s):  
Alternative Pathway ◽  
Metal Catalysts ◽  
Supported Metal Catalysts ◽  
Pretreatment Condition ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Co Reduction ◽  
Strong Metal Support Interaction ◽  
Supported Metal

Abstract Strong metal–support interaction (SMSI) plays a crucial role in determining the catalytic performances of supported metal catalysts, in which the subsequent migration of supports over the pre-existing metal nanoparticles is generally considered during the pretreatment condition. Herein, a distinct mechanism of SMSI generation by the co-reduction of oxide interphase is addressed over the Ru/TiO2 catalysts. Our results demonstrate that the formation of RuxTi1−xO2 oxide interphase can be facilely augmented by increasing the calcination temperature over Ru/TiO2 catalysts, while a growing encapsulation of TiOx overlayer on metallic Ru nanoparticles can be acquired in the following reduction of this oxide interphase. In contrast, the SMSI generation by the conventional mechanism is highly suppressed over the RuO2/TiO2 phase calcined at a low temperature. Thanks to this improved SMSI on Ru/TiO2 catalyst, it thus possesses an excellent performance in CO2 methanation, with a promoted CO2 conversion activity. Our findings suggest a different mechanism for the SMSI generation through the oxide interphase formation, and it also offers an alternative pathway to tune catalytic properties of supported metal catalysts.

Influence of Pt Size and CeO2 Morphology at the Pt-CeO2 Interface in CO Oxidation

2021 ◽  
Author(s):  
Sinmyung Yoon ◽  
Hyunwoo Ha ◽  
Jihun Kim ◽  
Eonu Nam ◽  
Mi Yoo ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Metal Nanoparticles ◽  
Rational Design ◽  
Catalytic Performance ◽  
Electronic Interactions ◽  
Oxide Supports ◽  
Metal Support ◽  
Metal Support Interactions

Understanding the inherent catalytic nature of the interface between metal nanoparticles (NPs) and oxide supports enables the rational design of metal-support interactions for high catalytic performance. Electronic interactions at the...

ChemInform Abstract: Some Recent Results on Metal/Support Interaction Effects in NM/CeO2 (NM Noble Metal) Catalysts

ChemInform ◽  
2010 ◽  
Vol 30 (28) ◽  
pp. no-no
Author(s):  
S. Bernal ◽  
J. J. Calvino ◽  
M. A. Cauqui ◽  
J. M. Gatica ◽  
C. Larese ◽  
...  
Keyword(s):  
Noble Metal ◽  
Interaction Effects ◽  
Metal Catalysts ◽  
Noble Metal Catalysts ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support
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