Strong metal-support interaction in Ni/TiO2 catalysts: in situ EXAFS and related studies

1993 ◽  
Vol 17 (1-2) ◽  
pp. 29-37 ◽  
Author(s):  
T. Arunarkavalli ◽  
G. U. Kulkarni ◽  
G. Sankar ◽  
C. N. R. Rao
Keyword(s):  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
In Situ Exafs ◽  
Strong Metal Support Interaction

scholarly journals Reversing sintering effect of Ni particles on γ-Mo2N via strong metal support interaction

2021 ◽  
Author(s):  
Lili Lin ◽  
Jinjia Liu ◽  
Xi Liu ◽  
Zirui Gao ◽  
Ning Rui ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Experimental Studies ◽  
Two Dimensional ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Ni Clusters ◽  
Strong Metal Support Interaction ◽  
Sintering Effect

Abstract The reverse sintering effect of Ni particles under thermal treatment has been observed in the Ni/γ-Mo2N catalysts. The ab initio molecular dynamic simulation has demonstrated the redispersion of metallic Ni particles into under-coordinated two-dimensional Ni clusters over γ-Mo2N is a thermodynamically favorable process. Utilizing pre-synthesized 4 nm Ni nanoparticles as the loaded particles, a Ni-4nm/γ-Mo2N model catalyst was synthesized and used to study the reverse sintering effect by the combination of multiple in-situ characterization methods, including in-situ quick XANES and EXAFS, ambient pressure XPS and environmental SE/STEM etc. The theoretical and experimental studies both confirmed the reverse sintering effect in the Ni-γ-Mo2N system is driven by the strong metal-support interaction between Ni and γ-Mo2N. The potential application of the reverse sintering effect in heterogeneous catalysis has been realized using the high temperature favored CO2 hydrogenation reaction. The under-coordinated two-dimensional layered Ni clusters on molybdenum nitride support generated from the Ni-4nm/γ-Mo2N has been demonstrated to be a thermally stable catalyst in 50 h stability test, and exhibits a remarkable catalytic selectivity reverse compared with traditional Ni based catalyst, leading to a chemo-specific CO2 hydrogenation to CO.

scholarly journals In Situ Strong Metal–Support Interaction (SMSI) Affects Catalytic Alcohol Conversion

ACS Catalysis ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1938-1945
Author(s):  
Felipe Polo-Garzon ◽  
Thomas F. Blum ◽  
Zhenghong Bao ◽  
Kristen Wang ◽  
Victor Fung ◽  
...  
Keyword(s):  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Alcohol Conversion ◽  
Strong Metal Support Interaction
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