Elucidating the Interactions between a [NiFe]-hydrogenase and Carbon Electrodes for Enhanced Bioelectrocatalysis

Ferrocene (FcH) derivatives monosubstituted by palmitoyl (1), hexadecyl (2), 1-adamantoyl (3) or 1-adamantylmethyl (4) groups were sythesized and characterized by NMR, mass and 57Fe Mossbauer spectroscopy. The structure of 1-adamantoylferrocene was determined by single-crystal X-ray diffraction. Cyclic voltammetry on gold and glass-like carbon electrodes demonstrated that the compounds can serve as electrochemical standards for special cases since their ferrocene/ferricinium redox potential remains stable and reversible, while the properties such as solubility, diffusion coefficients and surface tension are strongly solvent-dependent.

Download Full-text

Engineered Carbon Electrodes for High Performance Capacitive and Hybrid Energy Storage

Journal of Energy Storage ◽

10.1016/j.est.2021.102340 ◽

2021 ◽

Vol 35 ◽

pp. 102340

Author(s):

Vishnu Surendran ◽

Raveendran S. Arya ◽

Thazhe Veettil Vineesh ◽

Binson Babu ◽

Manikoth M. Shaijumon

Keyword(s):

Energy Storage ◽

High Performance ◽

Carbon Electrodes ◽

Hybrid Energy ◽

Hybrid Energy Storage

Download Full-text

A Novel Iron Chloride Red-Ox Concentration Flow Cell Battery (ICFB) Concept; Power and Electrode Optimization

Energies ◽

10.3390/en14041109 ◽

2021 ◽

Vol 14 (4) ◽

pp. 1109

Author(s):

Robert Bock ◽

Björn Kleinsteinberg ◽

Bjørn Selnes-Volseth ◽

Odne Stokke Burheim

Keyword(s):

Energy Storage ◽

Large Scale ◽

Fossil Fuels ◽

Flow Cell ◽

Iron Chloride ◽

Carbon Electrodes ◽

Concentration Difference ◽

Term Energy ◽

Short And Long Term

For renewable energies to succeed in replacing fossil fuels, large-scale and affordable solutions are needed for short and long-term energy storage. A potentially inexpensive approach of storing large amounts of energy is through the use of a concentration flow cell that is based on cheap and abundant materials. Here, we propose to use aqueous iron chloride as a reacting solvent on carbon electrodes. We suggest to use it in a red-ox concentration flow cell with two compartments separated by a hydrocarbon-based membrane. In both compartments the red-ox couple of iron II and III reacts, oxidation at the anode and reduction at the cathode. When charging, a concentration difference between the two species grows. When discharging, this concentration difference between iron II and iron III is used to drive the reaction. In this respect it is a concentration driven flow cell redox battery using iron chloride in both solutions. Here, we investigate material combinations, power, and concentration relations.

Download Full-text