Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 135 for “"Electrocatalysis"”.
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Oxygen reduction electrocatalysis
… in an orientation that allows for efficient electrocatalysis. In this work, anthracene-2-methanethiol (AMT) was employed to modify the surface of Au electrodes and the electrocatalytic activity of adsorbed laccase was examined. AMT facilitated the adsorption of laccase, and the onset of …
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[Ru-POM] Photo-electrocatalysis
… in the previous Ru-PVP:POM study. Finally, photo-electrocatalysis using thin films of polyoxomolybdates sensitised with ruthenium metallopolymers/gold nanoparticles using visible irradiation was described. Significantly, the efficiency of the photocatalysis depends markedly on the structure of the …
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Electrocatalysis In Li-S Batteries
<p>Stabilizing polysulfide-shuttle process while ensuring high sulfur loading holds the key to realize high theoretical energy density (2500 Wh/kg) of lithium-sulfur (Li-S) batteries. Though several carbon based porous materials have been used as host structures for sulfur and its intermediate …
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Applied Machine Learning for Electrocatalysis
… integration of machine learning in experimental electrocatalysis. This work expands the computational electrochemistry toolbox and establishes methods for data-driven catalyst discovery and autonomous experimentation.
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Designing interfacial structures for selective electrocatalysis
Selectivity of electrocatalysis in fuel cells stresses on the tolerance of electrode catalysts to cross-over species. A typical polymer electrolyte membrane fuel cell (PEMFC) employs a Nafion-based membrane to separate the Pt-based cathode and anode. Nevertheless, the intrinsic porosity of Nafion …
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Oxocarbon-derived porous carbonaceous materials for electrocatalysis
… pore structures, are particularly promising for electrocatalysis. However, the rational design of functional carbons, the development of new synthesis routes, and the exploration of the structure-activity relationship still remain challenging. This dissertation contributes to the development of …
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Electrocatalysis: dioxygen reduction and carbon dioxide conversion
U of I Only Restriction Lifted for Item 91480 on 2018-03-09T10:15:25Z.
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Ligand participation in energy storage electrocatalysis and photocatalysis
The electrochemical or photochemical production of fuels using energy from the sun is an attractive approach for storing solar energy. However, the development of efficient and inexpensive catalysts is necessary to facilitate these reactions. While a number of molecular catalysts do exist for this …
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Small molecule mimics of hydrogenase enzymes: synthesis, protonation, and electrocatalysis
In nature, H2 is processed by enzymes called hydrogenases, which catalyze the reduction of protons to dihydrogen, as well as the reverse reaction. The active sites of the two most prevalent hydrogenases contain NiFe or FeFe cores, bound to thiolates, cyanide, and carbon monoxide ligands. These …
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A combined electrochemical and x-ray photoelectron spectroscopic approach to electrocatalysis
Photoelectron spectroscopy and electrochemical techniques have been used to study commercial and model electrocatalysts for fuel cell applications. The overlying goal of this work is to gain a better understanding of the effects that electronic structure changes have on electrocatalytic systems. As …
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The Role of Surface Coverage of Reaction Intermediates in Heterogeneous Electrocatalysis
… is often assumed in the field of heterogeneous electrocatalysis, but this idealistic assumption can lead to predictions far from empirical observations. Herein, we show that fractional coverage of reaction intermediates is key to understanding kinetic behaviors of energy conversion reactions and …
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Molecular electrocatalysis of hydrogen evolution: catalytic design studied by density functional theory
A theoretical framework has been formulated to gain mechanistic insight into molecular hydrogen evolving electrocatalysts. Reduction potentials and pKa’s were calculated for a variety of complexes with density functional theory in conjunction with appropriate experimental references in order to …
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Electrocatalysis of oxide-based materials for the oxygen reduction and evolution reactions
… hydrogen economy. One primary goal of electrocatalysis research is thus the rational design of new materials with higher efficiencies. The fundamental understanding of the behaviour of the electrocatalyst materials towards these reactions will enable greater strides to be achieved in …
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In Situ Structural Study of Underpotential Deposition and Electrocatalysis on Gold(111) Electrodes
This thesis work has studied systems of Bi, Pb, Ag, and Hg underpotential deposition (UPD) on Au(111) electrodes. The application of the atomic force microscope (AFM), the scanning tunneling microscope (STM), and the surface x-ray scattering (SXS) to these UPD studies has provided in situ …
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Electrochemistry of well-defined rhodium(111) electrode and structural effects in heterogeneous electrocatalysis
… with exploring the crystallographic effects in electrocatalysis.
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A multiscale study of atomic interactions in the electrochemical double layer applied to electrocatalysis
… for accurate prediction of reaction kinetics in electrocatalysis. First, a kinetic model of the oxygen reduction reaction (ORR) on platinum, in connexion with first-principles techniques, is developed to illustrate that a self-consistent description of kinetics and reactant coverages on the …
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