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Showing 1 to 14 of 14 for “"Redox mediators"”.
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Redox Mediators and Electrolytes for High-Performance Li-O₂ Batteries
… Li₂O₂. Applying soluble electrocatalysts (redox mediators or RMs) that aid the formation and decomposition of the Li₂O₂ can help to reduce the overpotentials. Other challenges associated with the Li-O₂ battery include instability, leakages, flammability and volatility of commonly used …
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PEDOT Electrodes as Redox Mediators for Determination of Antioxidants in Beverages
Antioxidants play important roles in food quality and the protection and the promotion of human health. The most commonly used antioxidant determination techniques are the Folin-Ciocalteu assay and HPLC analyses. However, these methods have various disadvantages such as long time requirements, low …
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Energy Level Alignment in Hybrid Bulk Heterojunctions and New Redox Mediators for Quantum Dot Solar Cells
… light absorbing quantum dots, TiO2, and a redox mediator. Kinetically, reduction of oxidized quantum dots by the redox mediator should be rapid and faster than the back electron transfer between TiO2 and oxidized quantum dots to maintain photocurrent. Thermodynamically, the reduction …
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Characterizing mass transport and crossover reactions in Li-air batteries
… Similar to fuel cells, mass transport of redox active species, such as dissolved oxygen gas or redox mediators, is one of the challenges faced by LABs. While increasing mass transport increases LAB cell performance, it can also increase crossover of the redox active species from one …
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Towards comprehensive design of electrolytes for electrochemical energy storage
… devices. The electrolyte can also interact with redox reactions occurring at the electrodes, altering their thermodynamics and kinetics. Therefore, understanding how to control the properties of the electrolyte is vital for the development of next generation electrochemical storage devices. In …
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Experimental and Computational Electrochemistry to Move Toward Plastics Circularity
… (2) the computational study of organic redox mediators with the potential for polystyrene deconstruction (3) and the implementation of data driven models to improve the throughput of computational screening.
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The Influence of Inner-Sphere Reorganization on Rates of Interfacial Electron Transfer in Transition Metal-Based Redox Electrolytes
… recombination is prevented by utilizing redox electrolytes that promote directional electron transfer at the electrode/electrolyte interface, where forward electron transfer (i.e. to the electrode) is favored and the corresponding electronic recombination reaction is impeded. To meet this …
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The Role of Nitric Oxide and Peroxynitrite in Human Embryonic Stem Cell Differentiation
… and/or peroxynitrite (ONOO-) may play a role as redox mediators during early embryogenesis. After having working cell banks of mouse fibroblasts and hESCs, an eighteen-day hESC early differentiation system was established through the formation of embryoid bodies (EBs). The differentiation status …
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Multi-component protein films by layer-by-layer : assembly and electron transfer
… optimisation of signal transfer in these natural redox chains has inspired engineering of artificial architectures mimicking essential properties of their natural analogues. Implementation of direct electron transfer (DET) in protein assemblies was a breakthrough in bioelectronics, providing a …
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Development of a biocathode system in microbial fuel cells for improved treatment of azo dyes
… improve the efficiency of laccase, two natural redox mediators (syringaldehyde (Syr), acetosyringone (As)) and artificial mediator ABTS were used in the cathode. The presence of ABTS and As increased power density from 54.7±3.5 mW m-2 to 77.2±4.2 mW m-2 and 62.5±3.7 mW m-2 respectively. The …
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Treatment of azo dyes in industrial wastewater using microbial fuel cells
… use of applied external resistance (Rext) and redox mediators as tools for enhancing azo dye degradation kinetics in dual chamber MFCs was studied. The outcomes of this work suggest that azo dye reductive degradation kinetics in MFC anodes can be influenced by varying Rext. Furthermore, AO-7 …
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Elucidating the bio-electrochemical mechanism of exoelectrogenesis of the cyanobacterium Synechocystis sp. PCC6803
… Finally, the mechanism of mediation by exogenous redox mediators was studied, with the aim of understanding how to ‘wire’ (i.e. electrochemically connect) photosynthetic microorganisms efficiently to electrodes in a semi-artificial photosynthesis system. Using ultra-fast spectroscopic measurements …
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Strategies to Enable a Circular Economy in the Electronics Industry: Electrochemical Recovery of Metals
… the selectivity of the device, I then tested redox mediators (i.e., organic molecules that facilitate electron transfer and redox equilibrium) in the system to obtain direct metal reduction to reclaim zero-valent metal instead of metal oxides. Here, the goal was to develop a method to separate …
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Understanding the Limits of Lithium-Air Batteries – NMR and Thermodynamic Studies
Lithium-air batteries promise to deliver exceptionally high energy density while only using common materials, such as carbon, in their cathode structure. To do this, they oxidise a metallic lithium anode to release Li+ ions, which combine with O<sub>2</sub><sup>2-</sup> ions, produced from the …