Dr. Udayshankar Singh

Postdoctoral Researcher

Ph.D. (Chemistry) : University of Exeter, UK

M.Sc. (Analytical Chemistry): University of Pune, India

B.Sc. (Chemistry): University of Pune, India 

 
 

 





Research Project


Pd, Pt, and Rh supported on Al2O3 are widely used as automotive exhaust catalysts. These catalysts, known as three-way catalysts, simultaneously catalyze the oxidation of CO to CO2, hydrocarbons to CO2 and H2O, and the reduction of NOx to N2. My research involves the evaluation of the effects of ceria, zirconia, and lanthana on the PG (precious group) metals and Zero-PG metals for tandem CO oxidation and NOx reduction. In these systems, we have established that Pd(II) is catalytically more active for CO oxidation than Pd(0). Our current goal is to design a new Perovskite based catalytic system, which will stabilize Pd(II) at high temperature, have high activity at low temperature, and replace expensive PG metals with non-PG metals. In addition, we are studying reaction kinetics to determine the active sites, and the reaction mechanisms for these systems.

    


Selected Publications


Udayshankar G. Singh , Jun Li, Joseph W. Bennett, Andrew M. Rappe , Ram Seshadri, Susannah L. Scott, “A Pd-doped perovskite catalyst, BaCe1- x Pd x O3- d , for CO oxidation” Journal of Catalysis 249 (2007) 349–358.

Jun Li, Udayshankar G. Singh, Joseph W. Bennett, Katharine Page, James Weaver, Jinping Zhang, Thomas Proffen, Andrew M. Rappe, Susannah Scott, and Ram Seshadri, “BaCe 1-x Pd x O 3± d (0 < x < 0.1): Redox controlled ingress and egress of palladium in a perovskite” Chem. Mater.; 2007; 19 (6) pp 1418 – 1426.

Udayshankar G. Singh, Jun Li, Joseph W. Bennett, Andrew M. Rappe, Ram Seshadri and Susannah L. Scott, “Catalytic oxidation of CO oxidation over a precious metal-doped pervoskite catalyst, BaCe 1-x Pd x O 3± d ”  manuscript in preparation.

Udayshankar G. Singh , R.T. Williams, K.R. Hallam and G.C. Allen “Exploring the distribution of copper-Schiff base complex covalently anchored onto the surface of mesoporous MCM 41 silica” Journal of Solid State Chemistry , 178 (2005) 3415 .

Udayshankar G. Singh , R.T. Williams, K.R. Hallam and G.C. Allen “Synthesis and characterisation of titanium and titanium nitride-functionalised MCM 41 materials” Solid State Sciences. , 7 (2005) 1104 .

R.B. Bedford, Udayshanker G. Singh , R.I. Walton, R.T. Williams and S.A. Davis “Nanoparticulate palladium supported by covalently modified silicas: synthesis, characterisation and Application as catalysts for the Suzuki Coupling of aryl halides” Chemistry of Materials , 17 (2005) 701.



Oral Presentations


Catalytic oxidation of CO over BaCe 1- x Pd x O 3- d (2006 annual meeting of the Pacific Coast Catalysis Society, University of Washington , Washington , September 2006).

Characterization and activity of Pd-based mixed oxide catalyst for CO oxidation (2005 annual meeting of the Pacific Coast Catalysis Society, B erkeley , California , March 2005).

Synthesis, characterization and application of modified mesoporous silica (University of Liverpool, February 2004).

Synthesis and characterization of modified mesoporous silica (University of Newcastle, November 2003).

Nanoparticulate palladium supported by covalently modified silicas as catalysts for the Suzuki coupling of aryl halides (University of Exeter, October 2003).

Development of recyclable, high-activity catalysts for C-C bond formation (University of Exeter, January 2003 and The Open University, July 2003).