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Featured researches published by Bård Tøtdal.


Mikrochimica Acta | 2000

Analysis of Alloy Nanoparticles

Charles E. Lyman; Rollin E. Lakis; Harvey G. Stenger; Bård Tøtdal; Rune Prestvik

Abstract. Quantitative analysis of particles less than 10 nm in diameter requires a focused electron beam to isolate individual particles for X-ray emission spectrometry. Effects such as phase separation among particles and surface segregation within particles can only be determined by this technique. This analysis can be made quantitative with minimal use of the usual correction factors provided the small particles are supported on ceramic materials about the same thickness as the particles themselves. Two alloy nanoparticle systems are examined here: Pt-Rh and Pt-Re. In each case the catalytic properties resulting from various processing procedures have been correlated with the microstructure within and among individual particles.


Catalysis Today | 2001

The influence of the chlorine content on the bimetallic particle formation in Pt–Re/Al2O3 studied by STEM/EDX, TPR, H2 chemisorption and model reaction studies

Torbjørn Gjervan; Rune Prestvik; Bård Tøtdal; Charles E. Lyman; Anders Holmen

The influence of the chlorine content on the bimetallic particle formation in Pt–Re/Al2O3 studied by STEM/EDX, TPR, H2 chemisorption and model reaction studies


Journal of Catalysis | 2005

Synthesis of carbon nanofibers: effects of Ni crystal size during methane decomposition

De Chen; Kjersti Omdahl Christensen; Ester Ochoa-Fernández; Zhixin Yu; Bård Tøtdal; N. Latorre; A. Monzón; Anders Holmen


Journal of Catalysis | 2005

Characterization of alumina-, silica-, and titania-supported cobalt Fischer–Tropsch catalysts

Sølvi Storsæter; Bård Tøtdal; John C. Walmsley; Bjørn Steinar Tanem; Anders Holmen


Catalysis Today | 2005

Fischer–Tropsch synthesis over Re-promoted Co supported on Al2O3, SiO2 and TiO2: Effect of water

Sølvi Storsæter; Øyvind Borg; Edd A. Blekkan; Bård Tøtdal; Anders Holmen


Journal of Physical Chemistry B | 2005

Effect of support and reactant on the yield and structure of carbon growth by chemical vapor deposition.

Zhixin Yu; De Chen; Bård Tøtdal; Anders Holmen


Catalysis Today | 2005

Effect of Catalyst Preparation on the Carbon Nanotube Growth Rate

Zhixin Yu; De Chen; Bård Tøtdal; Anders Holmen


Applied Catalysis A-general | 2005

Catalytic engineering of carbon nanotube production

Zhixin Yu; De Chen; Bård Tøtdal; Tiejun Zhao; Ying-Chun Dai; Weikang Yuan; Anders Holmen


Applied Catalysis A-general | 2008

Large-scale synthesis of carbon nanofibers on Ni-Fe-Al hydrotalcite derived catalysts: II: Effect of Ni/Fe composition on CNF synthesis from ethylene and carbon monoxide

Zhixin Yu; De Chen; Magnus Rønning; Bård Tøtdal; Torbjørn Vrålstad; Esther Ochoa-Fernández; Anders Holmen


Catalysis Today | 2007

Au–TiO2 catalysts on carbon nanofibres prepared by deposition-precipitation and from colloid solutions

Nina Hammer; Ingvar Kvande; Xin Xu; Vidar Gunnarsson; Bård Tøtdal; De Chen; Magnus Rønning

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Anders Holmen

Norwegian University of Science and Technology

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De Chen

Norwegian University of Science and Technology

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Zhixin Yu

University of Stavanger

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Magnus Rønning

Norwegian University of Science and Technology

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Esther Ochoa-Fernández

Norwegian University of Science and Technology

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Sølvi Storsæter

Norwegian University of Science and Technology

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