Dioxygen at Biomimetic Single Metal-Atom Sites: Stabilization or Activation? The Case of CoTPyP/Au(111)Topics in Catalysis - Tập 63 Số 15-18 - Trang 1585-1595 - 2020
Francesco Armillotta, A. Pividori, Matuš Stredansky, Nicola Seriani, Vitaliy Feyer
AbstractBy means of a combined experimental and computational approach, we show that a 2D metal–organic framework self-assembled at the Au(111) termination is able to mimic the O2 stabilization and activation mechanisms that are typical of the biochemical environment of proteins and enzymes. 5,10,15,20-tetra(4-pyridyl)21H,23H-porphyrin cobalt(I...... hiện toàn bộ
On the Synergy Effect in MoO3–Fe2(MoO4)3 Catalysts for Methanol Oxidation to FormaldehydeTopics in Catalysis - Tập 50 - Trang 145-155 - 2008
Emma Söderhjelm, Matthew P. House, Neil Cruise, Johan Holmberg, Michael Bowker, Jan-Olov Bovin, Arne Andersson
Methanol oxidation to formaldehyde was studied over a series of Fe–Mo–O catalysts with various Mo/Fe atomic ratio and the end compositions Fe2O3 and MoO3. The activity data show that the specific activity passes through a maximum with increase of the Mo content and is the highest for Fe2(MoO4)3. The selectivity to formaldehyde, on the other hand, increases with the Mo content in the catalyst. A sy...... hiện toàn bộ
Photocatalytic Activity of AgBr as an Environmental CatalystTopics in Catalysis - Tập 56 - Trang 618-622 - 2013
Bungaku Kobayashi, Ryo Yamamoto, Hironobu Ohkita, Takanori Mizushima, Akira Hiraishi, Noriyoshi Kakuta
The photocatalytic activity of AgBr has been investigated. AgBr(N2) was prepared by solid(AgNO3)–solid(KBr) reaction at different temperatures in a stream of N2. AgBr(N2) prepared at 250 °C showed the highest H2 generation activity although the larger crystallites of Ag were observed. When the preparation was carried out under air [AgBr(air)] at 250 °C, the photoactivity and the crystallization of...... hiện toàn bộ
Isotope Effect of Hot Electrons Generated on Pt Nanoparticle Surfaces Under H2 and D2 OxidationTopics in Catalysis - Tập 61 - Trang 915-922 - 2018
Hyosun Lee, Ievgen I. Nedrygailov, Si Woo Lee, Jeong Young Park
Hot electrons are generated when an exothermic chemical reaction takes place on the surface of a metal catalyst. Detection of these electrons using a catalytic nanodiode based on a metal-semiconductor Schottky junction can shed light on the mechanisms for energy transfer between the reacting molecules and the catalyst. Here, we present a study on the isotope effect of hot electron generation durin...... hiện toàn bộ
Reaction pathway of benzonitrile formation during toluene ammoxidation on vanadium phosphate catalystsTopics in Catalysis - Tập 3 - Trang 377-386 - 1996
A. Martin, H. Berndt, B. Lücke, M. Meisel
The reaction pathway of the ammoxidation of toluene on (VO)2P2O7 used as catalyst and the interaction of potential intermediates with the pyrophosphate were studied by spectroscopic techniques (FTIR, EPR), temperature-programmed chemisorptions/ reactions (TPD, TPRS) and transient studies such as the temporal analysis of products (TAP) technique. NH3 is chemisorbed on the catalyst surface, forming ...... hiện toàn bộ
Nanostructured Functionalised Niobium Oxide as Chemoselective Catalyst for Acetalation of GlucoseTopics in Catalysis - Tập 65 - Trang 1994-2004 - 2022
Sahil Kumar, Kanika Saini, Shunmugavel Saravanamurugan, Xiaolei Zhang, Sushil Kumar Kansal
Developing a chemoselective catalyst for the acetalation of biomass-derived glucose to alkyl glycosides has been recognised as an emerging field due to its wide range of applications. The present study focuses on synthesising sulfate functionalised niobium oxide-based (NbOx-DS) catalyst to introduce medium/strong acidic sites that contribute to the catalytic activity towards glucose acetalation, w...... hiện toàn bộ
Continuous Wave and Pulse EPR Characterization of Open-Shell Ti3+ Ions Generated in Hybrid SiO2–TiO2 MonolithsTopics in Catalysis - Tập 61 - Trang 1485-1490 - 2018
Elena Morra, Andriy Budnyk, Alessandro Damin, Mario Chiesa
Open-shell Ti3+ ions are generated within hybrid SiO2–TiO2 mesoporous monoliths by reaction with triethylaluminium vapors. Continuous wave and 2D pulse electron paramagnetic resonance techniques are used to investigate the local coordination environment of the Ti3+ species through detection of hyperfine interactions of the unpaired electron with magnetically active nuclei of the matrix, including ...... hiện toàn bộ