Zdenek Dohnalek

Photochemical studies on N-doped TiO2 single crystals - Fundamental Investigations of Water Splitting on Model TiO2 (Mike Henderson's BES Project - 48526)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Michael Henderson

Project type

Large-Scale EMSL Research

Development of new energy sources is a major need for the 21st century. Hydrogen has considerable potential as an alternative fuel. The discovery by Fujishima and coworkers in 1969 that water could…

Structure and Reactivity of Ices, Amorphous Solids, and Supercooled Liquid Solutions at Interfaces and in the Condensed Phase

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

R. Smith

Project type

Large-Scale EMSL Research

The objective of this research is to examine physiochemical phenomena occurring at the surface and within the bulk of ices, amorphous solids, and supercooled liquid solutions. Our approach will be…

Atomically Resolved Studies of Transition Metal Oxides

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zdenek Dohnalek

Project type

Exploratory Research

STM and AFM studies will be conducted on surfaces of small crystalline domains and epitaxially grown thin TMO films such as &#947;-WO3(001), TiO2(110), and V2O5/TiO2(110). Such studies give…

Model system surface science approach to study photochemistry at adsorbate-substrate interfaces:
The trimethyl acetate, silver, titania system

Lead Institution

University of Texas at Austin

Principal Investigator

John White

Project type

Large-Scale EMSL Research

The field of heterogeneous photocatalysis on TiO2 has experienced unusual growth in the past decade because of increased interest in using light to promote chemical transformations. Researchers in…

Atomically Resolved Studies of Catalytic Oxidation of Organics on TiO2(110)

Lead Institution

Baylor University

Principal Investigator

Zhenrong Zhang

Project type

Large-Scale EMSL Research

A fundamental understanding of the structure-related mechanisms and dynamics of catalytic reactions on oxide catalysts is essential for the development of better catalytic systems. Catalytic…

Structural characterization of Nanoporous Thin Films

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zdenek Dohnalek

Project type

Exploratory Research

The adsorptive/reactive properties of nanoporous thin films of metals and oxides grown via ballistic deposition technique are being studied in our laboratory. We propose to utilize a variety of ex…

Chemical Kinetics and Dynamics at Interfaces: Structure and Reactivity of Ices, Amorphous Solids, and Supercooled Liquid Solutions (Kay's BES-Surface Kinetics, PNNL Scope #16248)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

R. Smith

Project type

Exploratory Research

The objective of this research is to examine physiochemical phenomena occurring at the surface and within the bulk of ices, amorphous solids, and supercooled liquid solutions. The microscopic…

Experimental Studies of Fundamental Molecule-Particle Interactions and Reactions on Iron Metal and Oxide Surfaces

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

R. Smith

Project type

Large-Scale EMSL Research

We will employ a novel 'atom-dropping' approach to explore the reactivity Fe and Fe oxides with environmentally relevant species. Iron oxides will be deposited directly via evaporation or…

Early Transition Metal Oxides as Catalysts (Kay's BES/Chemical Physics-Catalysis WBS0502 of Peden's BES-Chemical Transformations at Complex Interfaces, PNNL Scope #47319)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

R. Smith

Project type

Exploratory Research

Propose to study the catalytic and surface chemistry of transition metal oxides. We will use molecular beam and surface science techniques to grow and study novel oxide materials. We will focus on…

Structure and Catalytic Activity of Supported Early Transition Metal Oxide Clusters (Kay's BES/Chemical Physics-Catalysis WBS0502 of Peden's BES-Chemical Transformations at Complex Interfaces, PNNL Scope #47319)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zdenek Dohnalek

Project type

Exploratory Research

Current commercial heterogeneous catalysts are structurally and chemically complex and measurements on them can seldom be interpreted with atomic-level precision. This is especially so for supported…

Fundamentals of Carbonate Formation: Interactions of CO2 with Supported Metal Oxide Clusters

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Xiao Lin

Project type

Large-Scale EMSL Research

We propose to study the fundamental aspects of CO2 adsorption and reactions leading to carbonate (CO32-) formation on well-characterized surfaces and supported nanoclusters of model oxides. Well…

Carbon Nanotube Tips for High Aspect Ratio Scanning Tunneling Microscopy

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zdenek Dohnalek

Project type

Limited Scope

We propose to characterize carbon nanotube (CNT) tips supported on metal wires (W, Pt Ir) for scanning tunneling microscopy (STM) using an existing Omicron UHV STM at EMSL. A series of experiments…

Fundamental Studies of Water Splitting on Model TiO2, RuO2 and Mixed TiO2-RuO2 Catalysts

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Michael Henderson

Project type

Large-Scale EMSL Research

The objective of this project is to provide fundamental insights into the roles of co-catalysts in heterogeneous photocatalytic water splitting over model TiO2 and related semiconducting oxide…

Chemical Kinetics and Dynamics at Interfaces: Structure and Reactivity of Ices, Amorphous Solids, and Supercooled Liquid Solutions

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

R. Smith

Project type

Large-Scale EMSL Research

This proposal is a continuation of research under EMSL User Proposal #21890. The objective of this research is to examine physiochemical phenomena occurring at the surface and within the bulk of…

Decomposition Pathways of Glycerol on Titania-supported Pt and Cu Nanocatalysts

Lead Institution

Baylor University

Principal Investigator

Zhenrong Zhang

Project type

Large-Scale EMSL Research

Understanding the reaction mechanism is a key issue in the development of catalysts that can effectively convert glycerol, a top listed biomass-derived feedstock, to value-added chemicals. The…

Structure and Catalytic Activity of Supported Early Transition Metal Oxide Clusters

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zdenek Dohnalek

Project type

Large-Scale EMSL Research

This proposal is a continuation of research under EMSL User Proposal #22091. Current commercial heterogeneous catalysts are structurally and chemically complex and measurements on them can seldom be…

Implementation of Atomic-Scale Chemical Imaging via Combination of Scanning Tunneling and Electron Energy Loss Spectroscopies

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Igor Lyubinetsky

The project aims to establish an essential instrumental capability of the inelastic electron tunneling spectroscopy (IETS) on a new EMSL’s low-temperature scanning tunneling microscope (LT STM). This…

Experimental Studies of Fundamental Molecule-Particle Interactions and Reactions on Iron Metal and Oxide Surfaces

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

R. Smith

Project type

Large-Scale EMSL Research

Metal oxides constitute an important class of materials and are used in a wide range of catalytic and environmental science applications. In environmental applications, oxides are primarily used to…

Properties of Amorphous Solids and Supercooled Liquids near the Glass Transition: Models for Liquids at Interfaces and in the Condensed Phase

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

R. Smith

The aims of this proposal are to develop, implement, and execute innovative experimental approaches to measure the physical properties of amorphous solids and supercooled liquids near the glass…

Atomically Resolved Studies of Catalytic and Photocatalytic Processes on TiO2(110)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zdenek Dohnalek

Project type

Large-Scale EMSL Research

This proposal is a continuation of research under EMSL User Proposal #14591. In the last two decades, titanium dioxide has emerged as an extremely promising material with numerous applications in…

Understanding Water Splitting on Model Mixed Metal Oxide Photocatalysts

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Michael Henderson

Project type

Large-Scale EMSL Research

There is a need for new fundamental insights into photocatalytic water splitting particularly how to design catalyst systems that extend the catalytic and photocatalytic functionalities of simple…

Experimental and Theoretical Studies of Reaction Pathways for the Breakdown of Chlorinated Hydrocarbon Molecules by Metal and Metal Oxide Nanoparticles(including PNNL Scope # 42184/44076, Baer/Amonette/Tratnyek Nano-Fe BES/EMSP project)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James Amonette

Project type

Large-Scale EMSL Research

Metal and metal-oxide nanoparticles have been shown to have high reactivity towards a variety of chemical species, including chlorinated hydrocarbons and reducible oxyanions that frequently…

Model Early Transition Metal Oxide Catalysts for Biomass Conversion

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zdenek Dohnalek

Project type

Large-Scale EMSL Research

The detailed understanding of biomass conversion on well-defined model oxide catalysts provides valuable feedback for subsequent catalyst design and synthesis of desired products such as biofuels…

Pd Nanoclusters supported on MgO(100): Effects of cluster size on chemisorption properties.

Lead Institution

University of Washington

Principal Investigator

Steven Tait

Project type

Exploratory Research

Low-temperature methane combustion for applications in electric generator turbines is catalyzed by Pd nanoparticles to minimize NOx pollution. The reaction depends on the dissociation of methane…

Properties of Amorphous Solids and Supercooled Liquids near the Glass Transition: Models for Liquids at Interfaces and in the Condensed Phase

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

R. Smith

The aims of this proposal are to develop, implement, and execute innovative experimental approaches to measure the physical properties of amorphous solids and supercooled liquids near the glass…

Pd Nanoclusters supported on MgO(100): Effects of cluster size on chemisorption properties.

Lead Institution

University of Washington

Principal Investigator

Steven Tait

Project type

Exploratory Research

Low-temperature methane combustion for applications in electric generator turbines is catalyzed by Pd nanoparticles to minimize NOx pollution. The reaction depends on the dissociation of methane…

Model Ruthenium Oxide Catalysts for Biomass Conversion

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zdenek Dohnalek

This proposal focuses on mechanistic studies of biomass deoxygenation chemistry on model ruthenium oxide catalysts. Our previous work has concentrated on the properties of TiO2, WO3, and MoO3 based…

Theoretical Studies of Kinetic Processes in Nanoscale Ice Films

Lead Institution

University of Iceland

Principal Investigator

Hannes Jonsson

Project type

Exploratory Research

We will study the sticking probability of a water molecule on the basal plane of hexagonal ice using experiments and theory. The molecular sticking will be studied over a wide range in energy (0.5…

Accurate Embedded-Cluster Modeling of Insulators: Applications to Metal Oxide Surface Chemistry & Surface Excitation Processes

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Niranjan Govind

The accurate characterization of adsorbate reactivity and surface excitation processes at surfaces like metal oxide interfaces is key to understanding, controlling, and designing molecular…

Mechanistic Studies of Hydrogen Addition Reactions

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zdenek Dohnalek

This proposal focuses on attaining the mechanistic understanding of catalytic biomass hydrogenation reactions using small oxygenates as models for various functional groups present in biomass…

Atomically Resolved Studies of Adsorbates on TiO2(110)(Kay's BES/Chemical Physics-Catalysis WBS0502 of Peden's BES-Chemical Transformations at Complex Interfaces, PNNL Scope #47319)

Lead Institution

Baylor University

Principal Investigator

Zhenrong Zhang

Project type

Exploratory Research

The photochemistry of molecules adsorbed on surfaces provides a base of understanding of the photon stimulated process at adsorbate and substrate surface. TiO2 has been intensively investigated as…

Catalytic Studies of Transition Metal Oxide Monolayers Supported on Metal Single Crystal Surfaces

Lead Institution

Southern Illinois University

Principal Investigator

Qingfeng Ge

Project type

Large-Scale EMSL Research

Current commercial heterogeneous catalysts are structurally and chemically complex and measurements on them can seldom be interpreted with atomic-level precision. This is especially true for…

Properties of Amorphous Solids and Supercooled Liquids near the Glass Transition: Models for Liquids at Interfaces and in the Condensed Phase

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

R. Smith

The aims of this proposal are to develop, implement, and execute innovative experimental approaches to measure the physical properties of amorphous solids and supercooled liquids near the glass…

Chemical Characterization of Arrays of TiO2 Nanocolumns

Lead Institution

University of Texas at Austin

Principal Investigator

David Flaherty

Project type

Exploratory Research

We propose to study thin nano-structured films of titanium oxide, and vanadium- and nitrogen-doped titanium oxide which we will deposit by employing reactive ballistic deposition (RBD). Properly…

Theoretical models of the adsorption and desorption dynamics in compressed monolayers

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Gregory Kimmel

Project type

Exploratory Research

We will model the adsorption and desorption behavior of gases into and from compressed monolayers. The results should provide information regarding the energetics of compressed monolayers. …

STM Tip Analysis by TEM

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zdenek Dohnalek

Project type

Exploratory Research

This is a proof of principle study. The goal is to determine whether the TEM instrumentation can be used to analyze the sharpness and oxidation of the tips used in scanning tunneling microscopy (STM)…

Fundamental Investigations of Water Splitting on Model TiO2 (Kimmel's BES WBS04 of Henderson's BES-Hydrogen, PNNL Scope #48526)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Gregory Kimmel

Project type

Exploratory Research

Problem Statement - One of the major needs for the 21st century is the development of alternative energy sources to fossil fuels that do not contribute to greenhouse gas emissions. Hydrogen has…

Fundamental Studies of Heterogeneous Photocatalysis on Model TiO2 Surfaces

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Michael Henderson

Project type

Large-Scale EMSL Research

The objective of this project is to provide the field of heterogeneous photocatalysis with unique insights into the molecular-level properties of photocatalytic transformations through joint…

Condensed Phase Chemical Physics of Low Temperature Amorphous Solids and Gas Surface Interactions (Kay's BES-Surface Kinetics, PNNL Scope #16248)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Bruce Kay

Project type

Exploratory Research

We are investigating the thermodynamic behavior of amorphous solids and amorphous solid water. In addition, we are studying the dynamics of gas surface interactions.

Projects