Molecular catalytic system for efficient water splitting

The aim of this dissertation is to construct and explore artificial oxygen evolving complexes that are synthetically accessible, stable, functionally robust and efficient. To achieve this, a class of mono metal water splitting catalysts is introduced in this manuscript and exploitation of these complexes in homogeneous catalysis and in electrochemical studies with surface immobilized catalyst assemblies has been discussed. The catalysts are comprised of a single centre ruthenium or iridium metal core coordinated to a dinitrogen ligand and stabilized by a cyclic conjugated hydrocarbon. Homogeneous catalytic water oxidation is performed with a chemical oxidant as catalyst activator. For electro-assisted experiments, the catalyst complexes are functionalized with carboxylic or phosphonic acid linker units on the dinitrogen ligand that serve as anchoring sites for deposition on conducting oxide electrodes. The electrochemical water splitting systems with molecular catalysts have potential application in e.g. rooftop devices to make personalized energy carriers. The proposed __Artificial Leaf__ will soon be the future outcome of the present day technology and efforts in this field. Cheap and easy accessible hydrogen will not only serve as fuel for transportation but also as driving force for green power generation.Higher Education Commission (HEC), Government of PakistanUBL - phd migration 201

Ni-based electrocatalyst for water oxidation developed in-situ in a HCO3-/CO2 system at near-neutral pH

Solid state NMR/Biophysical Organic Chemistr

Electrochemical in situ surface enhanced Raman spectroscopic characterization of a trinuclear ruthenium complex, Ru-red

Solid state NMR/Biophysical Organic Chemistr

Artificial leaf goes simpler and more efficient for solar fuel generation

Solid state NMR/Biophysical Organic Chemistr

Biomimetic molecular water splitting catalysts for hydrogen generation

Solid state NMR/Biophysical Organic Chemistr

Surface generation of a cobalt-derived water oxidation electrocatalyst developed in a neutral HCO 3 − /CO 2 system

Solid state NMR/Biophysical Organic Chemistr

Ab initio molecular dynamics study of water oxidation reaction pathways in mono-ru catalysts

Solid state NMR/Biophysical Organic Chemistr

Electrochemical and Spectroscopic Study of Mononuclear Ruthenium Water Oxidation Catalysts: A Combined Experimental and Theoretical Investigation

Solid state NMR/Biophysical Organic Chemistr

Water Splitting Catalysis and Solar Fuel Devices Artificial Leaves on the Move

The development of new energy materials that can be utilized to make renewable and clean fuels from abundant and easily accessible resources is among the most challenging and demanding tasks in science today. Solar powered catalytic water splitting processes can be exploited as a source of electrons and protons to make clean renewable fuels, such as hydrogen, and in the sequestration of CO2 and its conversion into low carbon energy carriers. Recently, there have been tremendous efforts to build up a stand alone solar to fuel conversion device, the artificial leaf , using light and water as raw materials. An overview of the recent progress in electrochemical and photo electrocatalytic water splitting devices is presented, using both molecular water oxidation complexes WOCs and nano structured assemblies to develop an artificial photosynthetic syste