Zobrazeno 1 - 10
of 61
pro vyhledávání: '"A.M. Molenbroek"'
Autor:
A.M. Molenbroek, Kristin Høydalsvik, Jan Kehres, Ib Chorkendorff, Tejs Vegge, Dag W. Breiby, Jens Wenzel Andreasen, Jon Geest Jakobsen, Jostein Bø Fløystad, Haihua Liu, Jane Hvolbæk Nielsen
Publikováno v:
The Journal of Physical Chemistry C. 119:1424-1432
A nickel/spinel (Ni/MgAl_2O_4) catalyst, w(Ni) = 22 wt %, was investigated in situ during reduction with wide-angle X-ray scattering (WAXS) in a laboratory setup and with anomalous small-angle X-ray scattering (ASAXS) at a synchrotron source. Complem
Autor:
Haihua Liu, A.M. Molenbroek, Jan Kehres, Jakob Birkedal Wagner, Jens Sehested, Jon Geest Jakobsen, Jens Wenzel Andreasen, Ib Chorkendorff, Tejs Vegge
Publikováno v:
The Journal of Physical Chemistry C. 116:21407-21415
Combined in situ small- and wide-angle X-ray scattering (SAXS/WAXS) studies were performed in a new laboratory setup to investigate the dynamical properties of a ruthenium/spinel (Ru/MgAl2O4) catalyst, w(Ru) = 4 wt %, during the reduction and subsequ
Publikováno v:
Journal of Applied Crystallography. 44:495-502
This combined study using small-angle neutron scattering (SANS), X-ray powder diffraction (XRPD), transmission electron microscopy (TEM) and adsorption isotherm techniques demonstrates radical changes in the microstructure of porous hematite (α-Fe2O
Autor:
A.M. Molenbroek, J.F. Creemer, Stig Helveg, Patricia J. Kooyman, Pasqualina M. Sarro, Hendrik Willem Zandbergen
Publikováno v:
Journal of Microelectromechanical Systems. 19:254-264
We present a microelectromechanical systems (MEMS) nanoreactor that enables high-resolution transmission electron microscopy (TEM) (HRTEM) of nanostructured materials with atomic-scale resolution during exposure to reactive gases at 1 atm of pressure
Publikováno v:
Journal of Applied Crystallography. 39:519-526
The combination of transmission electron microscopy (TEM) andin situX-ray powder diffraction (XRPD) for the investigation of four model high-temperature shift catalysts makes it possible to obtain and compare information concerning the crystallite an
Autor:
Martin Nielsen, A.M. Molenbroek, Torben R. Jensen, Morten B. Sørensen, Jens Wenzel Andreasen, Allan Schrøder Pedersen, B. Møller, R. Burkarl, Anders Andreasen
Publikováno v:
Journal of Alloys and Compounds. :323-326
The interaction of hydrogen with an Mg–Al alloy pre-exposed to air have been studied with in situ time resolved X-ray powder diffraction. Phase fractions as a function of time are derived from series of consecutive diffraction patterns allowing kin
Autor:
Allan Schrøder Pedersen, R. Burkarl, Anders Andreasen, A.M. Molenbroek, B. Møller, Torben R. Jensen, Tejs Vegge, Morten B. Sørensen
Publikováno v:
Applied Physics A. 82:515-521
The dehydrogenation kinetics of air exposed samples of MgH2/Mg2Cu and MgH2/MgCu2 have been studied with in situ time resolved X-ray powder diffraction. The X-ray setup enabled the recording of full diffraction patterns within 150 s, thereby allowing
Autor:
Bjerne S. Clausen, Stig Helveg, A.M. Molenbroek, Poul Hansen, Jakob Birkedal Wagner, H. Topsøe
Publikováno v:
The Journal of Physical Chemistry B. 107:7753-7758
The metal−support interaction in a Cu/ZnO catalyst is investigated using in situ electron energy loss spectroscopy (EELS) with a resolution better than 1.3 eV. We focus on the energy loss near edge structure (ELNES) at the Cu L3 ionization edge. Th
Autor:
Hanne Skov Bengaard, A.M. Molenbroek, L.P. Nielsen, Jens R. Rostrup-Nielsen, Jens K. Nørskov, Clausen Bjerne Steffen, Jens Sehested
Publikováno v:
Journal of Catalysis. 209:365-384
Based on density functional theory calculations, kinetic measurements, microkinetic and Monte Carlo simulations, thermogravimetric analysis (TGA) experiments, extended X-ray absorption spectroscopy (EXAFS) measurements, and experimental results from
Publikováno v:
Journal of Catalysis. 194:452-460
Dynamic changes in the structure and catalytic activity of Cu/ZnO methanol synthesis catalysts have been investigated by a further developed in situ method, which combines X-ray diffraction (XRD), X-ray absorption fine structure spectroscopy (XAFS),