Journal ArticleDOI
Atomic and Macroscopic Reaction Rates of a Surface-Catalyzed Reaction
Reads0
Chats0
TLDR
The catalytic oxidation of carbon monoxide on a platinum surface was studied by scanning tunneling microscopy and the kinetic parameters were obtained, and their values agree well with data from macroscopic measurements.Abstract:
The catalytic oxidation of carbon monoxide (CO) on a platinum (111) surface was studied by scanning tunneling microscopy The adsorbed oxygen atoms and CO molecules were imaged with atomic resolution, and their reactions to carbon dioxide (CO 2 ) were monitored as functions of time The results allowed the formulation of a rate law that takes the distribution of the reactants in separate domains into account From temperature-dependent measurements, the kinetic parameters were obtained Their values agree well with data from macroscopic measurements In this way, a kinetic description of a chemical reaction was achieved that is based solely on the statistics of the underlying atomic processesread more
Citations
More filters
Journal ArticleDOI
Non-equilibrium critical phenomena and phase transitions into absorbing states
TL;DR: In this article, a review of recent developments in non-equilibrium statistical physics is presented, focusing on phase transitions from fluctuating phases into absorbing states, the universality class of directed percolation is investigated in detail.
Journal ArticleDOI
Ru-Pt core-shell nanoparticles for preferential oxidation of carbon monoxide in hydrogen.
TL;DR: Density functional theory studies suggest that the enhanced catalytic activity for the core-shell nanoparticle originates from a combination of an increased availability of CO-free Pt surface sites on the Ru@Pt nanoparticles and a hydrogen-mediated low-temperature CO oxidation process that is clearly distinct from the traditional bifunctional CO oxidation mechanism.
Journal ArticleDOI
Nonequilibrium Critical Phenomena and Phase Transitions into Absorbing States
TL;DR: In this article, a review of recent developments in nonequilibrium statistical physics is presented, focusing on phase transitions from fluctuating phases into absorbing states, and several examples of absorbing-state transitions which do not belong to the directed percolation universality class are discussed.
Journal ArticleDOI
Nanoscale science of single molecules using local probes
TL;DR: In revealing the crucial role of thermal, stochastic, and quantum-tunneling processes, experiments on individual molecules using scanning probe microscopies suggest that dynamics is inescapable and may play a decisive role in the evolution of nanotechnology.
References
More filters
Journal ArticleDOI
Oxygen interactions with the Pt(111) surface
TL;DR: Oxygen interaction with the Pt(111) surface has been studied by low energy electron loss (EELS), ultraviolet photoemission (UPS) and thermal desorption (TDS) spectroscopies over the temperature range 100 to 1400 K as mentioned in this paper.
Journal ArticleDOI
Identification of the "Active Sites" of a Surface-Catalyzed Reaction
TL;DR: In this paper, the authors studied the dissociation of nitric oxide on a ruthenium(0001) surface by scanning tunneling microscopy and found that the distribution of nitrogen atoms after the decomposition allowed the identification of the active sites for this reaction.
Journal ArticleDOI
A molecular beam study of the catalytic oxidation of CO on a Pt(111) surface
TL;DR: In this paper, the authors studied the reaction of carbon monoxide catalyzed by Pt(111) using reactive molecular beam-surface scattering and showed that at low coverage, the reaction proceeds with an activation energy E*LH =24.1 kcal/mole and a pre-exponential υ4 =0.11 cm2 particles−1
Journal ArticleDOI
Interactions between oxygen and carbon monoxide on a Pd(111) surface
TL;DR: In this article, the authors studied the kinetics of catalytic CO2 formation over the whole range of surface concentrations and showed that no appropriate description of the kinetic behavior of CO2 can be achieved in terms of simple rate laws involving coverage-independent rate constants and activation energies.
Related Papers (5)
A molecular beam investigation of the catalytic oxidation of CO on Pd (111)
T. Engel,Gerhard Ertl +1 more