Browsing Physics by Author "Hegde, M.S."

Now showing items 1-12 of 12

Ce(1-x)Rh(x)O(2-delta) solid solution formation in combustion-synthesized Rh/CeO2 catalyst studied by XRD, TEM, XPS, and EXAFS

Gayen, A.; Priolkar, K.R.; Sarode, P.R.; Jayaram, V.; Hegde, M.S.; Subbanna, G.N.; Emura, S. (Chemistry of Materials. 16(11); 2004; 2317-2328.)

Ionically dispersed Rh over CeO2 in Rh/CeO2 catalysts prepared by a single step solution combustion method is shown to improve the redox property and catalytic activity. The H-2/ Rh ratio obtained from hydrogen uptake ...
EXAFS study of Ti sub(0.98)Pd sub(0.02)O sub(2-delta) catalyst

Sarode, P.R.; Asakura, K.; Priolkar, K.R.; Hegde, M.S. (AIP Conference Proceedings. 1953(1); 2018; Article ID 070009.)

To understand the higher catalytic properties, the structure of 2 at. percent palladium supported on TiO sub(2) has been investigated by Extended X-ray absorption fine structure (EXAFS) spectroscopy. This nanocatalytic ...
Formation of Ce(1-x)Pd(x)O(2-delta) solid solution in combustion-synthesized Pd/CeO2 catalyst: XRD, XPS, and EXAFS investigation

Priolkar, K.R.; Bera, P.; Sarode, P.R.; Hegde, M.S.; Emura, S.; Kumashiro, R.; Lalla, N.P. (Chemistry of Materials. 14(5); 2002; 2120-2128.)

Pd/CeO2 (1 at. percent) prepared by the solution-combustion method shows a higher catalytic activity for CO oxidation and NO reduction than Pd metal, PdO, and Pd dispersed over CeO2 by the conventional method. To understand ...
Ionic Dispersion of Pt over CeO(2) by Combustion Method: Structural Investigation by XRD, TEM, XPS and EXAFS

Bera, P.; Priolkar, K.R.; Gayen, A.; Sarode, P.R.; Hegde, M.S.; Emura, S.; Kumashiro, R.; Jayaram, V.; Subbanna, G.N. (Chemistry of Materials. 15(Apr); 2003; 2049-2060.)

The structure and chemical nature of Pt in combustion-synthesized Pt/CeO(2) catalysts have been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ...
Local structure of Pt and Pd ions in Ce(1-x)Ti(x)O(2): X-ray diffraction, x-ray photoelectron spectroscopy, and extended x-ray absorption fine structure

Baidya, T.; Priolkar, K.R.; Sarode, P.R.; Hegde, M.S.; Asakura, K.; Tateno, G.; Koike, Y. (Journal of Chemical Physics. 128(12); 2008; Article ID: 124711)

Ce(1-x-y)Ti(x)Pt(y)O(2-delta)(x=0.15; y=0.01) and Ce(1-x-y)Ti(x)Pt(y)O(2-delta)(x= 0.25; y=0.02 and 0.05) are found to be good CO oxidation catalysts [T.Baidya et al., J. Phys. Chem. B 110, 5262 (2006); T.Baidya et al., ...
Origin of enhanced reducibility/oxygen storage capacity of Ce(1-x)Ti(x)O(2) compared to CeO(2) or TiO(2)

Dutta, G.; Waghmare, U.V.; Baidya, T.; Hegde, M.S.; Priolkar, K.R.; Sarode, P.R. (Chemistry of Materials. 18(14); 2006; 3249-3256.)

We determine chemical origins of increase in the reducibility of CeO(2) upon Ti substitution using a combination of experiments and first-principles density functional theory calculations. Ce(1-x)Ti(x)O(2) ( x = 0.0-0.4) ...
Oxide-ion conductivity in Cu(x)Ce(1-x)O(2-delta) (0 less than or equal to x less than or equal to 0.10)

Gayen, A.; Priolkar, K.R.; Shukla, A.K.; Ravishankar, N.; Hegde, M.S. (Materials Research Bulletin. 40(3); 2005; 421-431.)

Up to 10 at. percent of copper readily substitutes for cerium in ceria. It is found that at oxygen partial pressures between 0.21 atm and 10(-5) atm, Cu(x)Ce(1-x)O(2-delta) (0 less than = x less than = 0.10) solid solution ...
Reducibility of Ce(1-x)Zr(x)O(2): origin of enhanced oxygen storage capacity

Dutta, G.; Waghmare, U.V.; Baidya, T.; Hegde, M.S.; Priolkar, K.R.; Sarode, P.R. (Catalysis Letters. 108(41702); 2006; 165-172.)

We combine first-principles calculations with EXAFS studies to investigate the origin of high oxygen storage capacity in ceria-zirconia solid solution, prepared by solution combustion method. We find that nanocrystalline ...
Structural investigation of activated lattice Oxygen in Ce(1-x)Sn(x)O(2) and Ce(1-x-y)Sn(x)Pd(y)O(2-delta) by EXAFS and DFT calculation

Gupta, A.; Hegde, M.S.; Priolkar, K.R.; Waghmare, U.V.; Sarode, P.R.; Emura, S. (Chemistry of Materials. 21(24); 2009; 5836-5847.)

Substitution of Sn4+ ion in CeO(2) creates activated oxygen in Ce(0.8)Sn(0.2)O(2) leading to higher oxygen storage capacity compared to Ce(0.8)Zr(0.2)O(2). With Pd ion substitution in Ce(0.8)Sn(0.2)O(2), activation of ...
Structural investigation of combustion synthesized Cu/CeO(2) catalysts by EXAFS and other physical techniques: Formation of a Ce(1-x)Cu(x)O(2-delta) solid solution

Bera, P.; Priolkar, K.R.; Sarode, P.R.; Hegde, M.S.; Emura, S.; Kumashiro, R.; Lalla, N.P. (Chemistry of Materials. 14(8); 2002; 3591-3601.)

The structure and chemical environment of Cu in Cu/CeO(2) catalysts synthesized by the solution combustion method have been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), electron paramagnetic ...
Study of local environment of Ag in Ag/CeO(2) catalyst by EXAFS

Sarode, P.R.; Priolkar, K.R.; Bera, P.; Hegde, M.S.; Emura, S.; Kumashiro, R. (Materials Research Bulletin. 37(9); 2002; 1679-1690.)

The combustion synthesized Ag/CeO(2) catalysts have been characterized by Extended Xray Absorption Fine Structure (EXAFS) spectroscopy at the Ag K-edge.It has been found that Ag+ like species is present in 1 percent Ag/CeO(2) ...
Tailoring a Pt-Ru catalyst for enhanced methanol electro-oxidation

Raman, R.K.; Shukla, A.K.; Gayen, A.; Hegde, M.S.; Priolkar, K.R.; Sarode, P.R.; Emura, S. (Journal of Power Sources. 157(1); 2006; 45-55.)

A carbon-supported (1:1) Pt-Ru (Pt-Ru/C) alloy catalyst has been prepared in-house by the sulfito-complex route, and has been tailored to achieve enhanced activity towards methanol electro-oxidation by annealing it at ...

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