• 2777 Citations
  • 29 h-Index
1974 …2019

Research output per year

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Research Output

2002

One-step benzene oxidation to phenol. Part I: Preparation and characterization of Fe-(Al)MFI type catalysts

Giordano, G., Katovic, A., Perathoner, S., Pino, F., Centi, G., Nagy, J. B., Lazar, K. & Fejes, P., Jan 1 2002, In : Studies in Surface Science and Catalysis. 142 A, p. 477-484 8 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

One step benzene oxidation to phenol. Part II: Catalytic behavior of Fe-(Al)MFI zeolites

Perathoner, S., Pino, F., Centi, G., Giordano, G., Katovic, A., Nagy, J. B., Lazar, K. & Fejes, P., Jan 1 2002, In : Studies in Surface Science and Catalysis. 142 A, p. 503-510 8 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Phase relations and heat-induced chemical processes in sludges of hot-dip galvanization

Kazinczy, B., Kótai, L., Sajó, I. E., Holly, S., Lázár, K., Jakab, E., Gács, I. & Szentmihályi, K., Feb 20 2002, In : Industrial and Engineering Chemistry Research. 41, 4, p. 720-725 6 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Reaction-induced transformations in Pt-Sn/SiO2 catalysts: In situ 119Sn Mössbauer study

Lázár, K., Rhodes, W. D., Borbáth, I., Hegedüs, M. & Margitfalvi, J. L., Dec 1 2002, In : Hyperfine Interactions. 139-140, 1-4, p. 87-96 10 p.

Research output: Contribution to journalArticle

11 Citations (Scopus)
2001

Attempts to exchange iron into H-Y and H-ZSM-5 zeolites by in situ formed chloride-containing mobile species

Lázár, K., Micheaud, N., Mihályi, R. M., Pál-Borbély, G. & Beyer, H. K., Dec 1 2001, In : Reaction Kinetics and Catalysis Letters. 74, 2, p. 289-298 10 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)
21 Citations (Scopus)

Exchange of iron ions into layers of α-zirconium phosphate

Costantino, U., Szirtes, L., Kuzmann, E., Megyeri, J. & Lázár, K., May 1 2001, In : Solid State Ionics. 141-142, p. 359-364 6 p.

Research output: Contribution to journalConference article

17 Citations (Scopus)

In situ characterization of Sn-Pt/SiO2 catalysts used in low temperature oxidation of CO

Margitfalvi, J. L., Borbáth, I., Lázár, K., Tfirst, E., Szegedi, A., Hegedus, M. & Gobölös, S., Oct 1 2001, In : Journal of Catalysis. 203, 1, p. 94-103 10 p.

Research output: Contribution to journalArticle

44 Citations (Scopus)

Positronium interactions in synthetic zeolites: Effect of adsorbed water

Liszkay, L., Kajcsos, Z., Duplâtre, G., Lázár, K., Pál-Borbély, G. & Beyer, H. K., Jun 2 2001, In : Materials Science Forum. 363-365, p. 377-379 3 p.

Research output: Contribution to journalConference article

15 Citations (Scopus)

Positrons and positronium in grainy and porous solids

Kajcsos, Z., Liszkay, L., Duplâtre, G., Varga, L., Lázár, K., Pál-Borbély, G., Beyer, H. K., Lohonyai, L., Caullet, P. & Patarin, J., Jan 1 2001, In : Acta Physica Polonica A. 99, 3-4, p. 399-406 8 p.

Research output: Contribution to journalConference article

Open Access
3 Citations (Scopus)

Positrons and positronium in zeolites

Kajcsos, Z., Duplâtre, G., Liszkay, L., Lázár, K., Lohonyai, L., Pál-Borbély, G., Beyer, H. K., Caullet, P. & Patarin, J., Jun 7 2001, In : Materials Science Forum. 363-365, p. 238-243 6 p.

Research output: Contribution to journalConference article

13 Citations (Scopus)
23 Citations (Scopus)

Vas beépítése szodalitok szerkezetébe és átalakításuk más, vasat tartalmazó zeolitféleségekké

Translated title of the contribution: Incorporation of iron into sodalite structures and their transformation to other iron containing zeolite speciesPál, F., Imre, K., Ákos, K., Kristóf, K., Károly, L., István, M., Albert, O. & György, B., Mar 1 2001, In : Magyar Kemiai Folyoirat, Kemiai Kozlemenyek. 107, 3, p. 107-115 9 p.

Research output: Contribution to journalArticle

2000
76 Citations (Scopus)

Low-temperature CO oxidation over new types of Sn-Pt/SiO2 catalysts

Margitfalvi, J. L., Borbáth, I., Hegedus, M., Tfirst, E., Gobölös, S. & Lázár, K., Nov 15 2000, In : Journal of Catalysis. 196, 1, p. 200-204 5 p.

Research output: Contribution to journalArticle

44 Citations (Scopus)

On the peculiarities of positron annihilation features in silicalite-1 and Y-zeolites

Kajcsos, Z., Duplâtre, G., Liszkay, L., Billard, I., Bonnenfant, A., Azenha, E., Lázár, K., Pál-Borbély, G., Caullet, P., Patarin, J. & Lohonyai, L., Jun 1 2000, In : Radiation Physics and Chemistry. 58, 5-6, p. 709-714 6 p.

Research output: Contribution to journalConference article

13 Citations (Scopus)

Valency changes of iron and tin in framework-substituted molecular sieves investigated by in situ Mossbauer spectroscopy

Lázár, K., Chandwadkar, A. J., Fejes, P., Čejka, J. & Ramaswamy, A. V., Oct 30 2000, In : Journal of Radioanalytical and Nuclear Chemistry. 246, 1, p. 143-148 6 p.

Research output: Contribution to journalArticle

16 Citations (Scopus)
1999

Effect of ionizing radiation on various zirconium phosphate derivatives

Szirtes, L., Lázár, K. & Kuzmann, E., Aug 1 1999, In : Radiation Physics and Chemistry. 55, 5-6, p. 583-587 5 p.

Research output: Contribution to journalConference article

6 Citations (Scopus)

Free volumes in zeolites as probed by positrons

Duplâtre, G., Kajcsos, Z., Billard, I., Liszkay, L., Lázár, K., Lohonyai, L., Beyer, H. K., Caullet, P. & Patarin, J., Jan 1 1999, In : Studies in Surface Science and Catalysis. 125, p. 277-284 8 p.

Research output: Contribution to journalArticle

11 Citations (Scopus)

Iron nanoparticles in x and y zeolites

Lázár, K., Beyer, H. K., Onyestyák, G., Jönsson, B. J., Varga, L. K. & Pronier, S., Jan 1 1999, In : Nanostructured Materials. 12, 1, p. 155-158 4 p.

Research output: Contribution to journalConference article

4 Citations (Scopus)

Oxygen transfer centers in Fe-FER and Fe-MFI zeolites: Redox behavior and Debye temperature derived from in situ Mössbauer spectra

Lázár, K., Kotasthane, A. N. & Fejes, P., Mar 1999, In : Catalysis Letters. 57, 4, p. 171-177 7 p.

Research output: Contribution to journalArticle

38 Citations (Scopus)

Site preference and reducibility of substituted ferric iron in Fe-ETS-10

Lázár, K., Das, T. K., Chaudhari, K. & Chandwadkar, A. J., Jan 1 1999, In : Studies in Surface Science and Catalysis. 125, p. 301-306 6 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Synthesis, characterization, and catalytic properties of mesoporous tin-containing analogs of MCM-41

Chaudhari, K., Das, T. K., Rajmohanan, P. R., Lazar, K., Sivasanker, S. & Chandwadkar, A. J., Jan 1 1999, In : Journal of Catalysis. 183, 2, p. 281-291 11 p., jcat.1999.2394.

Research output: Contribution to journalArticle

144 Citations (Scopus)

Valency and coordination of iron in FeAlPO molecular sieves: An in situ Mössbauer study

Lázár, K. & Cejka, J., Jan 1 1999, In : Studies in Surface Science and Catalysis. 125, p. 213-220 8 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

ZnO-Fe nanocomposites via ball milling and annealing

Takacs, L., Mossion, A., Lázár, K., Varga, L. K., Pardavi-Horvath, M. & Bakhshai, A., Jan 1 1999, In : Nanostructured Materials. 12, 1, p. 245-248 4 p.

Research output: Contribution to journalConference article

6 Citations (Scopus)
1998
82 Citations (Scopus)

Interpreting the oxidative catalytic activity in iron-substituted ferrierites using in situ mössbauer spectroscopy

Lázár, K., Lejeune, G., Ahedi, R. K., Shevade, S. S. & Kotasthane, A. N., Jun 18 1998, In : Journal of Physical Chemistry B. 102, 25, p. 4865-4870 6 p.

Research output: Contribution to journalArticle

31 Citations (Scopus)
1997
22 Citations (Scopus)

Further results on long-lived positronium states in Zeosil

Kajcsos, Z., Duplâtre, G., Varga, L., Billard, I., Liszkay, L., Lohonyai, L., Caullet, P., Patarin, J. & Lázár, K., Dec 1 1997, In : Materials Science Forum. 255-257, p. 405-407 3 p.

Research output: Contribution to journalArticle

9 Citations (Scopus)

In situ 119Sn-mössbauer spectroscopic study on MFI, MEL, and MTW tin silicalites

Lázár, K., Szeleczky, A. M., Mal, N. K. & Ramaswamy, A. V., Jan 1 1997, In : Zeolites. 19, 2-3, p. 123-127 5 p.

Research output: Contribution to journalArticle

27 Citations (Scopus)

Izomorf módon helyettesített ZSM-5 zeolitok hokezelése és ennek jelentosége a heterogén katalízisben

Translated title of the contribution: Heat-treatment of isomorphously substitued ZSM-5 zeolites and its importance in heterogeneous catalysisFejes, P., Horváth, A., Halász, J., Nagy, J. B. & Lázár, K., Nov 1 1997, In : Magyar Kemiai Folyoirat, Kemiai Kozlemenyek. 103, 11, p. 531-539 9 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Mixed-metal pillared layer clays and their pillaring precursors

Pálinkó, I., Molnár, Á., Nagy, J. B., Bertrand, J. C., Lázár, K., Valyon, J. & Kiricsi, I., Apr 21 1997, In : Journal of the Chemical Society - Faraday Transactions. 93, 8, p. 1591-1599 9 p.

Research output: Contribution to journalArticle

30 Citations (Scopus)
1996

Magnetic quenching effects on long-lived positronium states in zeosil

Duplâtre, G., Kajcsos, Z., Goworek, T., Varga, L., Liszkay, L., Billard, I. & Lázár, K., Jan 1 1996, In : Journal of Radioanalytical and Nuclear Chemistry. 211, 1, p. 225-235 11 p.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Preliminary results of the positron annihilation in zeolites: Peak shape and 3γ-decay

Varga, L., Liszkay, L., Kajcsos, Z., Lázár, K., Beyer, H. K., Onestyák, G., Kótai, E. & Lohonyai, L., Dec 1 1996, In : Journal of Radioanalytical and Nuclear Chemistry. 211, 1, p. 237-245 9 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
16 Citations (Scopus)
1995

Catalysts by solid-state ion exchange: Iron in zeolite

Lázár, K., Pál-Borbély, G., Beyer, H. K. & Karge, H. G., Jan 1 1995, In : Studies in Surface Science and Catalysis. 91, C, p. 551-559 9 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Encaged iron phthalocyanine for oxygen transfer; Catalytic and Mössbauer spectroscopic study

Lázár, K., Szeleczky, A. M., Notheisz, F. & Zsigmond, Jan 1 1995, In : Studies in Surface Science and Catalysis. 94, C, p. 720-727 8 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)

In situ Mössbauer study of iron containing MFI ferrisilicates: Relations to catalytic properties

Lázár, K., M.-Szeleczky, A., Vorbeck, G., Fricke, R., Vondrova, A. & Cejka, J., Mar 1 1995, In : Journal of Radioanalytical and Nuclear Chemistry Articles. 190, 2, p. 407-411 5 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

In situ studies of various forms of iron in MFI ferrisilicates

Lázár, K., Fricke, R., Kosslick, H., Cejka, J., Vorbeck, G. & Szeleczky, A. M., Jan 1 1995, In : Studies in Surface Science and Catalysis. 94, C, p. 219-225 7 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Long-living positron and positronium states in zeolites and microcrystalline oxides

Kajcsos, Z., Liszkay, L., Varga, L., Lázár, K. & Lohonyai, L., Mar 1 1995, In : Journal of Radioanalytical and Nuclear Chemistry Articles. 190, 2, p. 475-480 6 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Mixing of 2γ- and 3γ- events in the data collection of positron annihilation experiments: microcrystalline powders and zeolites

Kajcsos, Z., Liszkay, L., Varga, L., Lazar, K., Brauer, G. & Dauwe, C., Jan 1 1995, In : Materials Science Forum. 175-178, pt 2, p. 959-962 4 p.

Research output: Contribution to journalConference article

15 Citations (Scopus)
11 Citations (Scopus)
8 Citations (Scopus)
1994

Geometric factors in K and Al promoting of the Fe/MgO Fischer-Tropsch catalyst

Boskovic, G., Vlajnic, G., Kis, E., Putanov, P., Guczi, L. & Lazar, K., Jan 1 1994, In : Industrial and Engineering Chemistry Research. 33, 9, p. 2090-2095 6 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Solid-state ion exchange in zeolites. Part 5. - NH4-Y-iron(II) chloride

Lázár, K., Pál-Borbély, G., Beyer, H. K. & Karge, H. G., Dec 1 1994, In : Journal of the Chemical, Faraday Transactions. 90, 9, p. 1329-1334 6 p.

Research output: Contribution to journalArticle

42 Citations (Scopus)

Studies on the Stability of Fe3+ ions in the ferrisilicate analog of zeolite beta

Raj, A., Sivasanker, S. & Lázár, K., Jan 1 1994, In : Journal of Catalysis. 147, 1, p. 207-213 7 p.

Research output: Contribution to journalArticle

23 Citations (Scopus)
1993

Ion-exchange with Pd/Pt and Fe and their reduction to metallic state in zeolites: Positron annihilation and Moessbauer studies

Kajcsos, Z., Lazar, K. & Brauer, G., Sep 1 1993, In : Journal De Physique. IV : JP. 3, 4, p. 197-200 4 p.

Research output: Contribution to journalConference article

7 Citations (Scopus)
1992

Associated and single iron ions in ion-exchanged faujasite zeolites

Lázár, K., Manninger, I. & Choudary, B. M., Apr 1992, In : Hyperfine Interactions. 69, 1-4, p. 747-750 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Effects of preparation on the properties of Mo, Al, and Ca promoted Fe/MgO catalysts

Putanov, P., Boskovic, G., Kis, E., Lázár, K. & Guczi, L., Mar 1992, In : Journal of Solid State Chemistry. 97, 1, p. 41-47 7 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Promoter effect of Cu, Co and K on Fe/MgO in CO hydrogenation

Putanov, P., Boskovic, G., Vlajnic, G., Kis, E., Lázár, K. & Guczi, L., Jan 1 1992, In : Journal of molecular catalysis. 71, 1, p. 81-92 12 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)