Paired electrolysis for simultaneous generation of synthetic fuels and chemicals

Martínez, Natalia; Isaacs, Mauricio; Nanda, Kamala Kanta

doi:10.1039/c9nj06133a

Cited by 62 publications

(64 citation statements)

References 73 publications

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“…In this regard, continuous operation in a flow reactor with a compact membrane‐electrode assembly (MEA) structure can greatly reduce the ohmic loss and thus improve the energy efficiency [9] . Moreover, the enhanced mass transport in the MEA‐based flow electrolyzer allows for electrochemical transformations at much higher current density ( i. e ., hundreds of mA cm −2 ) as compared to the H‐type cell, which would be highly desirable for scale‐up studies under commercially‐relevant conditions [4b,5a,c,10] …”

Section: Introductionmentioning

confidence: 99%

Paired and Tandem Electrochemical Conversion of 5‐(Hydroxymethyl)furfural Using Membrane‐Electrode Assembly‐Based Electrolytic Systems

et al. 2021

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Pairing the electrocatalytic hydrogenation (ECH) reaction with different anodic reactions holds great promise for producing value‐added chemicals driven by renewable energy sources. Replacing the sluggish water oxidation with a bio‐based upgrading reaction can reduce the overall energy cost and allows for the simultaneous generation of high‐value products at both electrodes. Herein, we developed a membrane‐electrode assembly (MEA)‐based electrolysis system for the conversion of 5‐(hydroxymethyl)furfural (HMF) to bis(hydroxymethyl)furan (BHMF) and 2,5‐furandicarboxylic acid (FDCA). With (2,2,6,6‐tetramethylpiperidin‐1‐yl)oxyl (TEMPO)‐mediated electrochemical oxidation (ECO) of HMF at the anode, the unique zero‐gap configuration enabled a minimal cell voltage of 1.5 V at 10 mA, which was stable during a 24‐hour period of continuous electrolysis, resulting in a combined faradaic efficiency (FE) as high as 139 % to BHMF and FDCA. High FE was also obtained in a pH‐asymmetric mediator‐free configuration, in which the ECO was carried out in 0.1 M KOH with an electrodeposited NiFe oxide catalyst and a bipolar membrane. Taking advantage of the low cell resistance of the MEA‐based system, we also explored ECH of HMF at high current density (280 mA cm−2), in which a FE of 24 % towards BHMF was achieved. The co‐generated H2 was supplied into a batch reactor in tandem for the catalytic hydrogenation of furfural or benzaldehyde under ambient conditions, resulting in an additional 7.3 % of indirect FE in a single‐pass operation. The co‐electrolysis of bio‐derived molecules and the tandem electrocatalytic‐catalytic process provide sustainable avenues towards distributed, flexible, and energy‐efficient routes for the synthesis of valuable chemicals.

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Section: Introductionmentioning

confidence: 99%

Paired and Tandem Electrochemical Conversion of 5‐(Hydroxymethyl)furfural Using Membrane‐Electrode Assembly‐Based Electrolytic Systems

et al. 2021

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“…[36] Alternatively, a different anodic process could generate a second product in a paired electrochemical process, as in chlor-alkali technology that produces Cl2 and NaOH from brine. [50] Multiple oxidation candidates are available, including biomass, [40,51] various amines, [52] or the production of high value oxidants e.g. HClO and S2O8 2-.…”

Section: Latest Developments For H 2 O 2 Electrosynthesismentioning

confidence: 99%

Future perspectives for the advancement of electrochemical hydrogen peroxide production

Perry

Mavrikis

Wang

et al. 2021

Current Opinion in Electrochemistry

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H2O2 is an important chemical with multiple uses across domestic and industrial settings. A global need for wider adoption of green synthetic methods, there has been a growing interest in the electrochemical synthesis of H2O2 from oxygen reduction or water oxidation. State of the art catalyst and reactor developments are beginning to advance to a stage where electrochemical synthesis is discussed as a viable alternative to current industrial methods. In this review, we highlight some of the most promising candidates for H2O2 electrosynthesis technologies, and what further advancements are needed before the electrochemical route could challenge the ubiquitous anthraquinone process.

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“…With respect to the aqueous organic oxidation reactions, several key parameters need to be considered [17] . First of all, the anodic chemicals should be soluble or easily dispersed in water and have significantly lower oxidation potentials compared with the onset potential of the OER.…”

Section: Anodic Auxiliary Electrosynthesismentioning

confidence: 99%

Accelerating Hydrogen Evolution by Anodic Electrosynthesis of Value‐Added Chemicals in Water over Non‐Precious Metal Electrocatalysts

Xiang

Wang

et al. 2021

ChemPlusChem

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Integrating electrolytic hydrogen production from water with thermodynamically more favorable aqueous organic oxidation reactions is highly desired, because it can enhance the energy conversion efficiency in relation to traditional water electrolysis, and produce value‐added chemicals instead of oxygen at the anode. In this Minireview, we introduce some key considerations for anodic auxiliary electrosynthesis and outline three types of electrocatalytic organic reactions including biomass derivative, alcohol and amine oxidation reactions, which can boost cathodic hydrogen generation. Furthermore, frequently used noble‐metal‐free electrocatalysts are classified into nickel‐based, cobalt‐based, other transition‐metal‐based and bimetallic electrocatalysts. The preparation methods of these catalysts and their performance towards electrochemical oxidation reactions are also discussed in detail. We specifically highlight the importance of redox active sites on the surface of the electrocatalysts, which act as electron mediators to promote oxidation reactions. Finally, the current challenges and future developments in this emerging field are also discussed.

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Paired electrolysis for simultaneous generation of synthetic fuels and chemicals

Abstract: Replacing anodic oxygen evolution of water splitting or carbon dioxide reduction by electro-organic oxidation increases their product-value and energy efficiency.

Cited by 62 publications

References 73 publications

Paired and Tandem Electrochemical Conversion of 5‐(Hydroxymethyl)furfural Using Membrane‐Electrode Assembly‐Based Electrolytic Systems

Paired and Tandem Electrochemical Conversion of 5‐(Hydroxymethyl)furfural Using Membrane‐Electrode Assembly‐Based Electrolytic Systems

Future perspectives for the advancement of electrochemical hydrogen peroxide production

Accelerating Hydrogen Evolution by Anodic Electrosynthesis of Value‐Added Chemicals in Water over Non‐Precious Metal Electrocatalysts

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