Formate Cycle: The Third Way in Green Energy

Gotovsky, M.; Gotovsky, A.; Mikhailov, V. D.; Lychakov, V.; Sukhorukov, Y.; Sukhorukova, Evgeniya V.

doi:10.18178/ijcea.2019.10.6.767

Cited by 4 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Converting sustainably generated energies to a chemical form is desirable and important for long-term energy storage and transport [2]. A variety of small, high-energy molecules are promising target products for this conversion, including hydrogen and formate, because only simple, two-electron reduction reactions are required for their production and their usability in existing technologies [3][4][5]. Hydrogen is particularly interesting due to its high energy content, low redox potential, and usage in a wide variety of industrial processes [4,6].…”

Section: Introductionmentioning

confidence: 99%

Enzymatic Hydrogen Electrosynthesis at Enhanced Current Density Using a Redox Polymer

et al. 2021

View full text Add to dashboard Cite

High-temperature tolerant enzymes offer multiple advantages over enzymes from mesophilic organisms for the industrial production of sustainable chemicals due to high specific activities and stabilities towards fluctuations in pH, heat, and organic solvents. The production of molecular hydrogen (H2) is of particular interest because of the multiple uses of hydrogen in energy and chemicals applications, and the ability of hydrogenase enzymes to reduce protons to H2 at a cathode. We examined the activity of Hydrogen-Dependent CO2 Reductase (HDCR) from the thermophilic bacterium Thermoanaerobacter kivui when immobilized in a redox polymer, cobaltocene-functionalized polyallylamine (Cc-PAA), on a cathode for enzyme-mediated H2 formation from electricity. The presence of Cc-PAA increased reductive current density 340-fold when used on an electrode with HDCR at 40 °C, reaching unprecedented current densities of up to 3 mA·cm−2 with minimal overpotential and high faradaic efficiency. In contrast to other hydrogenases, T. kivui HDCR showed substantial reversibility of CO-dependent inactivation, revealing an opportunity for usage in gas mixtures containing CO, such as syngas. This study highlights the important potential of combining redox polymers with novel enzymes from thermophiles for enhanced electrosynthesis.

show abstract

Section: Introductionmentioning

confidence: 99%

Enzymatic Hydrogen Electrosynthesis at Enhanced Current Density Using a Redox Polymer

et al. 2021

View full text Add to dashboard Cite

show abstract

“…One challenge of hydrogen usage in a future energy economy is the storage and transport of explosive hydrogen gas between production and consumption. Formate has previously been proposed as an alternative chemical for energy storage in place of hydrogen. − Formate and hydrogen have very similar redox potentials ( E °′ hydrogen = −414 mV vs SHE, E °′ formate = −420 mV vs SHE), and formate is highly soluble in water, allowing for a large energy equivalent to be stored in a small volume, without a high risk of ignition when the compound is in an oxic environment . In biological systems, carbon dioxide and formate are interconverted by formate dehydrogenases (FDHs), formate:hydrogen lyases, or H 2 -dependent CO 2 reductases.…”

Section: Enzymatic Electrochemistry Of C1 Compoundsmentioning

confidence: 99%

Enzyme Electrochemistry for Industrial Energy Applications—A Perspective on Future Areas of Focus

Ruth

Spormann

2021

ACS Catal.

View full text Add to dashboard Cite

While enzymes catalyze reactions with high selectivity and specificity at ambient temperature and pressure, electroactive enzymes retain such remarkable catalytic properties for catalyzing redox reactions on the basis of direct or mediated electron transfer with an electrode. They offer the possibility for alternative, environmentally friendly production for a variety of industrially relevant chemicals, such as hydrogen gas, ammonia, and methanol. This Perspective summarizes the recent progress in electrochemistry involving hydrogenases, nitrogenases, and enzymes involved in the chemistry of one-carbon compounds. We discuss the current challenges of achieving high catalytic rates and stability on the basis of two promising improvements to existing enzymatic electrochemical systemsredox polymers and gasdiffusion electrodes.

show abstract

“…In [1], [2], it was noted that a promising general scheme for obtaining green fuel and products with a minus carbonic effect can be the "formate cycle". The basis of the formate cycle is the electrochemical production of formic acid from water and atmospheric CO 2 :…”

Section: Introductionmentioning

confidence: 99%

Formate Fischer–tropsch Process for Producing Traditional Energy Carriers With Zero Carbon Balance

Gotovsky¹,

Gotovsky²,

Lychakov³

et al. 2019

WIT Transactions on Ecology and the Environment

View full text Add to dashboard Cite

The Fischer-Tropsch process (F-T process) is known as a method of synthesizing organic products (including liquid fuel) from CO + H2 mixture gases (synthesis gas) using various catalysts. The interest in the F-T process is associated with the global struggle against carbon emissions. Earlier we noted that the electrochemical synthesis of formic acid from water and atmospheric CO2 can be a promising general scheme for obtaining "green fuel" with minus (negative) "carbonic effect" simultaneously "formate cycle" (synthesis of organic products from formic acid produced from atmospheric CO2) fuel has zero carbon balance. This synthesis is brought to efficiency, surpassing natural photosynthesis. Synthesized formic acid can be used as a fuel for fuel cells and as a hydrogen accumulator. A semiproduct of green fuel synthesis with zero carbon balance and synthetic organic chemical products with minus carbon balance (thanks to bonded carbon from atmospheric CO2). From an economical point the direct use of formic acid would be more rational (with the exception of one stage), without first carbon monoxide separation. From the point of view of the physical chemistry, it is necessary to take into account the relatively low reactivity of formic acid in comparison with carbon monoxide. The traditional way of activation, by applying high temperatures, high pressures and specific catalysts in gas phase. However, using electromagnetic activation may be a more interesting pathway. This aspect will be discussed in this work. The final selection of the method based on the results of bench scale should be made on the basis of a complex criterion of the rate of passage of the modified F-T process and economic indicators: equipment cost, and energy consumption in terms of the mass of final products, taking into account of their cost. In this case, it appears an alternative way of obtaining some final products without using fossil hydrocarbons.

show abstract

Formate Cycle: The Third Way in Green Energy

Cited by 4 publications

References 5 publications

Enzymatic Hydrogen Electrosynthesis at Enhanced Current Density Using a Redox Polymer

Enzymatic Hydrogen Electrosynthesis at Enhanced Current Density Using a Redox Polymer

Enzyme Electrochemistry for Industrial Energy Applications—A Perspective on Future Areas of Focus

Formate Fischer–tropsch Process for Producing Traditional Energy Carriers With Zero Carbon Balance

Contact Info

Product

Resources

About