Potential dependence of gluconic acid to glucose electroreduction on silver

Wolfsgruber, Maria; Patil, Prathamesh; Pichler, Christian M.; Bischof, Robert H.; Budnyk, Serhiy; Paulik, Christian; Rodrigues, Bruno V. M.; Slabon, Adam

doi:10.1039/d3cy00897e

Cited by 4 publications

(3 citation statements)

References 37 publications

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“…AucAg was prepared accordingly to previous studies from our group. 20,44 For all experiments, a Pt mesh was used as counter electrode (CE) and an Ag/AgCl (saturated KCl) as reference electrode (RE). The measured potentials vs. Ag/AgCl (saturated KCl) were converted vs. RHE according to the following eqn (1): E RHE = E 0 Ag/AgCl(sat.…”

Section: Methodsmentioning

confidence: 99%

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Revisiting the electrocatalytic hydrogenation of furfural to furfuryl alcohol using biomass-derived electrolytes

Wolfsgruber,

Bischof,

Paulik

et al. 2024

RSC Sustain.

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Section: Methodsmentioning

confidence: 99%

“…The pretreatments of the electrodes and the membranes were in line with our previous studies. 20,44 Linear sweep voltammetry (LSV) experiments with the aforementioned WEs with the electrolytes LA, HAc and NaAc to test the inter-combinations of WEs and electrolytes were performed. An electrode surface of 1 cm 2 was selected.…”

Section: Electrocatalysismentioning

confidence: 99%

Revisiting the electrocatalytic hydrogenation of furfural to furfuryl alcohol using biomass-derived electrolytes

Wolfsgruber,

Bischof,

Paulik

et al. 2024

RSC Sustain.

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 99%

Bioelectrorefinery of furfural to furfuryl alcohol in aqueous media

Wolfsgruber,

Bischof,

Paulik

et al. 2023

Preprint

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Electrocatalytic hydrogenation of furfural to furfuryl alcohol represents a sustainable approach to utilizing renewable energy for producing bio-based platform chemicals. However, low Faraday efficiencies (FEs) and the use of organic solvents with high environmental impacts often render the process less sustainable than classical catalytic hydrogenation. In this study, a two-compartment and three-electrode setup at ambient temperature and atmospheric pressure, featuring various electrodes (Ag, Au, CP, Cu, Pt, Sn, and a gold-coated silver wire (AucAg)), and biomass-derived electrolytes (acetic acid, levulinic acid, and sodium acetate), was tested. AucAg, serving as an electrocatalyst with 1 M sodium acetate as electrolyte, exhibited the best combination of FE and furfuryl alcohol yield with 82% and 37%, respectively. The optimum conditions were achieved at 100 rpm and −0.8 V vs. RHE. Scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) analyzes indicated no significant influence of the substances on the working electrode during the reaction. Since the identity of the cation of the electrolyte influences the electrode-electrolyte microenvironment, multiple alkali metals were trialed. Sodium ion as the counter ion emerged on top, surpassing potassium, and cesium ions for the electroreduction of furfural to furfuryl alcohol. This preference could be attributed to the competing hydrogen evolution reaction favored by Cs over K and Na. In this perspective, the highlights of a bioelectrorefinery concept for creating a bio-derived platform chemical in a sustainable solvent with green electrons are demonstrated and optimized.

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Mixed‐Potential‐Driven Catalysis in Glucose Oxidation

Yan,

Arsyad,

Putri Namari

et al. 2024

ChemCatChem

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Mixed‐potential‐driven catalysis, in which anodic and cathodic reactions are electrochemically short‐circuited, converts the Gibbs free energy difference into overpotentials that drive both half‐reactions without an external energy input. We developed a theoretical framework that suggests that the catalytic activities of individual catalyst components determine the distribution of the aforementioned driving forces. By short‐circuiting spatially separated electrodes made of Au/C with reduced‐graphene oxide, nitrogen‐doped reduced‐graphene oxide, caged nitrogen‐doped reduced‐graphene oxide, Pt/C, or Pd/C, we demonstrated this framework using glucose oxidation as a model, given its significance in generating high‐value products and its potential in fuel cell technology. A short‐circuit current was detected in the absence of external potentials, demonstrating electron transfer during glucose oxidation. Additionally, by correlating the mixed potential predicted from the polarization curves of each half‐reaction with the mixed potential measured in short‐circuit experiments under the same conditions, we confirmed that the kinetic activity of each catalyst component determines the mixed potential. This, in turn, affects the division of the driving force. Driving force partitioning is a potent tool for enhancing the overall rate of a reaction. Our findings may facilitate the design of not only glucose oxidation catalysts but also other heterogeneous catalysts based on mixed‐potential‐driven reaction mechanisms.

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Potential dependence of gluconic acid to glucose electroreduction on silver

Abstract: The electrocatalytic conversion of gluconic acid, an aldonic acid, as a model component of spent sulfite liquor (SSL) represents a green approach for side stream valorization.

Cited by 4 publications

References 37 publications

Revisiting the electrocatalytic hydrogenation of furfural to furfuryl alcohol using biomass-derived electrolytes

Revisiting the electrocatalytic hydrogenation of furfural to furfuryl alcohol using biomass-derived electrolytes

Bioelectrorefinery of furfural to furfuryl alcohol in aqueous media

Mixed‐Potential‐Driven Catalysis in Glucose Oxidation

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