An electrogenerative acidobasic cell utilizing biomass for the generation of electricity and molecular hydrogen

Kyriacou, Demetrios; Jahngen, Edwin

doi:10.1007/bf00625595

Cited by 80 publications

(83 citation statements)

References 6 publications

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“…2 (third curve) confirms the results in the literature that reported that the reduction of CO 2 would effectively occur at a pH between 7 and 9 i.e. the domain of pH where HCO 3 -is the predominant species [48,50,51]. In order to identify the rate-determining step of CO 2 electro-reduction, CV experiments were performed at various potential sweep rates.…”

Section: Eelectrochemical Behavior Of Carbon Dioxidesupporting

confidence: 71%

“…The bubbling was stopped when the pH value of the solution reached 8.5. Subsequently, the initial concentration of the predominant species calculated from equilibrium constants is 4.86 9 10 -1 mol L -1 for HCO 3 -while those of the carbonate ions and CO 2 are 7.18 9 10 -3 and 4.13 9 10 -3 mol L -1 , respectively. As can be seen in Fig.…”

Section: Filter Press Electrochemical Cellmentioning

confidence: 99%

“…However, its widespread availability can also contribute as a valuable reactant for synthesizing chemicals [1][2][3][4][5][6][7][8][9]. Today, there is a growing demand for formic acid which is used in pharmaceutical syntheses, as well as paper and pulp production.…”

Section: Introductionmentioning

confidence: 99%

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Electro-reduction of carbon dioxide to formate on lead electrode in aqueous medium

et al. 2008

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The electrochemical reduction of carbon dioxide on a lead electrode was studied in aqueous medium. Preliminary investigations carried out by cyclic voltammetry were used to determine the optimized conditions of electrolysis. They revealed that the CO 2 reduction process was enhanced at a pH value of 8.6 for the cathodic solution i.e. when the predominant form of CO 2 was hydrogenocarbonate ion. Long-term electrolysis was carried out using both potentiometry and amperometry methods in a filterpress cell in which the two compartments were separated by a cation-exchange membrane (Nafion Ò 423). Formate was detected and quantified by chromatography as the exclusive organic compound produced with a high Faradaic yield (from 65% to 90%). This study also revealed that the operating temperature played a key role in the hydrogenation reaction of carbon dioxide into formate in aqueous medium.

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Section: Eelectrochemical Behavior Of Carbon Dioxidesupporting

confidence: 71%

Section: Filter Press Electrochemical Cellmentioning

confidence: 99%

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Electro-reduction of carbon dioxide to formate on lead electrode in aqueous medium

et al. 2008

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“…[175] Although an umber of studies evaluated the role of concentrationa nd the influence of electrolyte, this awas the the first time such ac omprehensive study on the rate of CO 2 RR was undertaken. [197][198][199] The study established the role of cations in the electrolyte in converting CO 2 into CH 3 OH; for instance, an electrolyte containing trivalent cations such as La 3 + and Nd 3 + would exhibit af aster CO 2 reduction rate to CH 3 OHthan onewith single-valentcations such as Na + .Furthermore, theoretical calculations with Cu-based catalysts also advocate new alloy combinations as such calculations show that alloyingC uw ith other metals, such as Pd and Pt, mayr esult in higher CH 3 OH production rates. [200] 2.2.5.…”

Section: Alloysmentioning

confidence: 99%

Liquid Hydrocarbon Production from CO₂: Recent Development in Metal‐Based Electrocatalysis

Daiyan

et al. 2017

ChemSusChem

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Rising levels of CO2 accumulation in the atmosphere have attracted considerable interest in technologies capable of CO2 capture, storage and conversion. The electrochemical reduction of CO2 into high‐value liquid organic products could be of vital importance to mitigate this issue. The conversion of CO2 into liquid fuels by using photovoltaic cells, which can readily be integrated in the current infrastructure, will help realize the creation of a sustainable cycle of carbon‐based fuel that will promote zero net CO2 emissions. Despite promising findings, significant challenges still persist that must be circumvented to make the technology profitable for large‐scale utilization. With such possibilities, this Minireview presents the current high‐performing catalysts for the electrochemical reduction of CO2 to liquid hydrocarbons, address the limitations and unify the current understanding of the different reaction mechanisms. The Minireview also explores current research directions to improve process efficiencies and production rate and discusses the scope of using photo‐assisted electrochemical reduction systems to find stable, highly efficient catalysts that can harvest solar energy directly to convert CO2 into liquid hydrocarbons.

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“…19 The phase diagram of salt-organics-water mixtures has a binodal curve dividing the two-phase from the single, miscible phase region and tie lines representing the equilibrium composition of the liquid phases, which are strongly dependent of the salt composition and temperature. While various salts might be used as electrolytes, cesium carbonate is particularly attractive because is known to promote CO2 reduction, [20][21][22] and can also be used to phase-separate ethanol produced at the cathode. 16 The experimentally measured binodal curve for cesium carbonate-water-ethanol mixture at 20 C is given by the following empirical equation 16 :…”

Section: Phase Equilibrium Of Salt-ethanol-water Mixturesmentioning

confidence: 99%

Design of an artificial photosynthetic system for production of alcohols in high concentration from CO₂

Singh

Bell

2016

Energy Environ. Sci.

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Artificial photosynthesis of liquid fuels is a potential source for clean energy. Of particular interest is the formation of alcohols because Alcohols are particularly attractive products because of their high energy density and market value per amount of energy input. The major challenges in photo/electrochemical synthesis of alcohols from sunlight, water and CO2 are low product selectivity, high membrane fuel crossover losses, and high cost of product separation from the electrolyte. Here we propose an artificial photosynthesis scheme for direct synthesis and separation to almost pure ethanol with minimum product crossover using saturated salt electrolytes. The ethanol produced in the saturated salt electrolytes can be readily phase separated into a microemulsion, which can be collected as pure products in a liquid-liquid extractor. A novel design of an integrated artificial photosynthetic system is proposed that continuously produces >90 wt% pure ethanol using a polycrystalline copper anode and an IrO2 cathode at a current density of 0.85 mA cm -2 . The annual production rate of > 90 wt% ethanol using such a photosynthesis system operating at 10 mA cm -2 (12% solar-to-fuel (STF) efficiency) can be 15.27 million gallons per year per square kilometer, which corresponds to 7% of the industrial ethanol production capacity of California.

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An electrogenerative acidobasic cell utilizing biomass for the generation of electricity and molecular hydrogen

Cited by 80 publications

References 6 publications

Electro-reduction of carbon dioxide to formate on lead electrode in aqueous medium

Electro-reduction of carbon dioxide to formate on lead electrode in aqueous medium

Liquid Hydrocarbon Production from CO₂: Recent Development in Metal‐Based Electrocatalysis

Design of an artificial photosynthetic system for production of alcohols in high concentration from CO₂

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An electrogenerative acidobasic cell utilizing biomass for the generation of electricity and molecular hydrogen

Cited by 80 publications

References 6 publications

Electro-reduction of carbon dioxide to formate on lead electrode in aqueous medium

Electro-reduction of carbon dioxide to formate on lead electrode in aqueous medium

Liquid Hydrocarbon Production from CO2: Recent Development in Metal‐Based Electrocatalysis

Design of an artificial photosynthetic system for production of alcohols in high concentration from CO2

Contact Info

Product

Resources

About

Liquid Hydrocarbon Production from CO₂: Recent Development in Metal‐Based Electrocatalysis

Design of an artificial photosynthetic system for production of alcohols in high concentration from CO₂