A5013180691- Photosynthetic Processes and Mechanisms
- Microbial Fuel Cells and Bioremediation
- Electrocatalysts for Energy Conversion
- Electrochemical sensors and biosensors
- Metalloenzymes and iron-sulfur proteins
- Electrochemical Analysis and Applications
- Advanced Photocatalysis Techniques
- Cassava research and cyanide
- CO2 Reduction Techniques and Catalysts
- Spectroscopy and Quantum Chemical Studies
- Catalytic Processes in Materials Science
- Photoreceptor and optogenetics research
- Sulfur Compounds in Biology
- Copper-based nanomaterials and applications
- Algal biology and biofuel production
- Microbial Community Ecology and Physiology
- Physical Education and Pedagogy
- Mesoporous Materials and Catalysis
- Molecular Junctions and Nanostructures
- Electron Spin Resonance Studies
- Ammonia Synthesis and Nitrogen Reduction
- Photonic Crystals and Applications
- Solar-Powered Water Purification Methods
- TiO2 Photocatalysis and Solar Cells
- Polymer Surface Interaction Studies
University of Cambridge
2016-2022
European Research Council
2022
Massachusetts Institute of Technology
2020
Nanyang Technological University
2015
A rational approach for a photosystem II-based electrode assembly is described, integrating redox polymers with high surface area hierarchically structured electrodes.
Solar-driven coupling of water oxidation with CO2 reduction sustains life on our planet and is high priority in contemporary energy research. Here, we report a photoelectrochemical tandem device that performs photocatalytic to formate. We employ semi-artificial design, which wires W-dependent formate dehydrogenase (FDH) cathode photoanode containing the photosynthetic enzyme, Photosystem II, via synthetic dye complementary light absorption. From biological perspective, system achieves...
Factors governing the photoelectrochemical output of photosynthetic microorganisms are poorly understood, and energy loss may occur due to inefficient electron transfer (ET) processes. Here, we systematically compare photoelectrochemistry photosystem II (PSII) protein-films cyanobacteria biofilms derive: (i) losses in light-to-charge conversion efficiencies, (ii) gains photocatalytic longevity, (iii) insights into ET mechanism at biofilm interface. This study was enabled by use...
Hydrogenases (H2 ases) are benchmark electrocatalysts for H2 production, both in biology and (photo)catalysis vitro. We report the tailoring of a p-type Si photocathode optimal loading wiring ase through introduction hierarchical inverse opal (IO) TiO2 interlayer. This proton-reducing Si|IO-TiO2 |H2 is capable driving overall water splitting combination with photoanode. demonstrate unassisted (bias-free) by to modified BiVO4 photoanode photoelectrochemical (PEC) cell during several hours...
Semiartificial photosynthesis integrates photosynthetic enzymes with artificial electronics, which is an emerging approach to reroute the natural photoelectrogenetic pathways for sustainable fuel and chemical synthesis. However, reduced catalytic activity of in bioelectrodes limits overall performance further applications production. Here, we show new insights into factors that affect photoelectrogenesis a model system consisting photosystem II three-dimensional indium tin oxide graphene...
Visible-light driven H2 evolution in water is achieved using catechol-photosensitised TiO2 nanoparticles with a molecular nickel catalyst. Layer-by-layer immobilisation of catechol-TiO2 onto tin-doped indium oxide electrodes generates photocathodic currents the presence an electron acceptor. This approach represents new strategy for controlling photocurrent direction dye-sensitised photoelectrochemical applications.
The biological formate hydrogenlyase (FHL) complex links a dehydrogenase (FDH) to hydrogenase (H2ase) and produces H2 CO2 from via mixed-acid fermentation in Escherichia coli. Here, we describe an electrochemical colloidal semiartificial FHL system that consists of FDH H2ase immobilized on conductive indium tin oxide (ITO) as electron relay. These vitro systems benefit the efficient wiring highly active enzyme pair allow for reversible conversion under ambient temperature pressure. hybrid...
The origin of selectivity in the hollowing silica nanoparticles is investigated to further understand silica. It realized that, during synthesis, precursors are essentially ion‐paired polyelectrolytes, whose nucleation depends on concentration counter ions, and most importantly, size/length poly(silicic acid). Thus, “silica” that nucleates out at different stages synthesis has degrees ion doping, which explains its solubility water, microporosity, selective etching phenomena. water shown be...
Direct potential control of protein redox centres for both electrochemical and EPR characterisation.
Protein film photoelectrochemistry has previously been used to monitor the activity of photosystem II, water-plastoquinone photooxidoreductase, but mechanistic information attainable from a three-electrode setup remained limited. Here we introduce four-electrode rotating ring disk electrode technique for quantifying light-driven reaction kinetics and pathways in real time at enzyme–electrode interface. This allows us study photochemical H2O oxidation II gain an in-depth understanding that...
Thiosulfate dehydrogenases (TsdAs) are bidirectional bacterial di-heme enzymes that catalyze the interconversion of tetrathionate and thiosulfate at measurable rates in both directions. In contrast to our knowledge TsdA activities, information on redox properties absence substrates is rather scant. To address this deficit, we combined magnetic CD (MCD) spectroscopy protein film electrochemistry (PFE) a study resolve heme ligation chemistry two representative TsdAs. We examined TsdAs from...
Abstract Hydrogenases (H 2 ases) are benchmark electrocatalysts for H production, both in biology and (photo)catalysis vitro. We report the tailoring of a p‐type Si photocathode optimal loading wiring ase through introduction hierarchical inverse opal (IO) TiO interlayer. This proton‐reducing Si|IO‐TiO |H is capable driving overall water splitting combination with photoanode. demonstrate unassisted (bias‐free) by to modified BiVO 4 photoanode photoelectrochemical (PEC) cell during several...
The decahaem cytochrome MtrC from Shewanella oneidensis MR-1 was employed as a protein electron conduit between porous indium tin oxide electrode and redox enzymes. Using hydrogenase fumarate reductase, shown suitable efficient diode to shuttle electrons the with activity regulating direction of enzymatic reactions.
Abstract A growing number of bacterial species are known to move electrons across their cell envelopes. Naturally this occurs in support energy conservation and carbon-fixation. For biotechnology it allows electron exchange between bacteria electrodes microbial fuel cells during electrosynthesis. In context Rhodopseudomonas palustris TIE-1 is much interest. These respond light by taking from external environment, including electrodes, drive CO 2 -fixation. The PioA cytochrome, that spans the...
Thiosulfate dehydrogenases are bacterial cytochromes that contribute to the oxidation of inorganic sulfur. The active sites these enzymes contain low-spin
Moritz F. Kuehnel opened a discussion of the paper by Andrew I. Cooper: What do you know about HOMO and LUMO localisation on polymers? I suppose this is strongly affected introducing heteroatoms such as sulfur, that causes changes observed when oxidising thiophene to