Monitoring surface metal oxide catalytic active sites with Raman spectroscopy

2010 ◽  
Vol 39 (12) ◽  
pp. 5002 ◽  
Author(s):  
Israel E. Wachs ◽  
Charles A. Roberts
Keyword(s):  
Raman Spectroscopy ◽  
Metal Oxide ◽  
Active Sites ◽  
Catalytic Active Sites ◽  
Surface Metal

scholarly journals A Combined Computational and Experimental Study of Methane Activation during Oxidative Coupling of Methane (OCM) by Surface Metal Oxide Catalysts

2021 ◽  
Author(s):  
Daniyal Kiani ◽  
Sagar Sourav ◽  
Jonas Baltrusaitis ◽  
Israel E Wachs
Keyword(s):  
Experimental Study ◽  
Metal Oxide ◽  
Oxidative Coupling ◽  
Active Sites ◽  
Computational Models ◽  
Oxidative Coupling Of Methane ◽  
Catalytic Active Sites ◽  
Surface Metal ◽  
Heterolytic Dissociation ◽  
First Time

The experimentally validated computational models developed herein, for the first time, show that Mn-promotion does not enhance the activity of the surface Na2WO4 catalytic active sites for CH4 heterolytic dissociation...

ChemInform Abstract: Au-metal Oxide Support Interface as Catalytic Active Sites

ChemInform ◽  
2013 ◽  
Vol 44 (50) ◽  
pp. no-no
Author(s):  
Yi Y. Wu ◽  
Neema A. Mashayekhi ◽  
Harold H. Kung
Keyword(s):  
Metal Oxide ◽  
Active Sites ◽  
Oxide Support ◽  
Metal Oxide Support ◽  
Catalytic Active Sites

In situ Raman spectroscopy studies of bulk and surface metal oxide phases during oxidation reactions

1996 ◽  
Vol 32 (1-4) ◽  
pp. 47-55 ◽  
Author(s):  
Israel E. Wachs ◽  
Jih-Mirn Jehng ◽  
Goutam Deo ◽  
Bert M. Weckhuysen ◽  
Vadim V. Guliants ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Metal Oxide ◽  
Oxidation Reactions ◽  
In Situ Raman Spectroscopy ◽  
In Situ Raman ◽  
Oxide Phases ◽  
Surface Metal ◽  
Spectroscopy Studies

Au–metal oxide support interface as catalytic active sites

2013 ◽  
Vol 3 (11) ◽  
pp. 2881 ◽  
Author(s):  
Yi Y. Wu ◽  
Neema A. Mashayekhi ◽  
Harold H. Kung
Keyword(s):  
Metal Oxide ◽  
Active Sites ◽  
Oxide Support ◽  
Metal Oxide Support ◽  
Catalytic Active Sites

scholarly journals Facile Synthesis of Uniform Mesoporous Nb2O5 Micro-Flowers for Enhancing Photodegradation of Methyl Orange

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3783
Author(s):  
Jian-Qing Qiu ◽  
Huan-Qing Xie ◽  
Ya-Hao Wang ◽  
Lan Yu ◽  
Fang-Yuan Wang ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Active Sites ◽  
High Performance ◽  
Diffuse Reflectance Spectroscopy ◽  
X Ray Diffraction ◽  
Flower Structure ◽  
Electron Microscopies ◽  
Bet Method ◽  
One Step ◽  
Catalytic Active Sites

The removal of organic pollutants using green environmental photocatalytic degradation techniques urgently need high-performance catalysts. In this work, a facile one-step hydrothermal technique has been successfully applied to synthesize a Nb2O5 photocatalyst with uniform micro-flower structure for the degradation of methyl orange (MO) under UV irradiation. These nanocatalysts are characterized by transmission and scanning electron microscopies (TEM and SEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) method, and UV-Vis diffuse reflectance spectroscopy (DRS). It is found that the prepared Nb2O5 micro-flowers presents a good crystal phases and consist of 3D hierarchical nanosheets with 400–500 nm in diameter. The surface area is as large as 48.6 m2 g−1. Importantly, the Nb2O5 micro-flowers exhibit superior catalytic activity up to 99.9% for the photodegradation of MO within 20 mins, which is about 60-fold and 4-fold larger than that of without catalysts (W/O) and commercial TiO2 (P25) sample, respectively. This excellent performance may be attributed to 3D porous structure with abundant catalytic active sites.

scholarly journals NaBr Poisoning of Au/TiO2 Catalysts: Effects on Kinetics, Poisoning Mechanism, and Estimation of the Number of Catalytic Active Sites

ACS Catalysis ◽  
2012 ◽  
Vol 2 (4) ◽  
pp. 684-694 ◽  
Author(s):  
Bert D. Chandler ◽  
Shane Kendell ◽  
Hieu Doan ◽  
Rachel Korkosz ◽  
Lars C. Grabow ◽  
...  
Keyword(s):  
Active Sites ◽  
Catalytic Active Sites
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