New insights into lignin electrolysis on nickel-based electrocatalysts: Electrochemical performances before and after oxygen evolution

Beliaeva, K.; Grimaldos-Osorio, N.; Ruiz-López, Estela; Burel, L.; Vernoux, P.; Caravaca, A.

doi:10.1016/j.ijhydene.2021.01.224

Cited by 23 publications

(10 citation statements)

References 70 publications

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“…Apart from the CP study, a CA study was carried out at −1.8 and −2.3 V (see Figure 7). As described by Caravaca et al [37], and reported in many other works [34][35][36]38] at different conditions, lignin electrolysis always gives higher current densities for the same E applied for water electrolysis. In Figure 7, this is demonstrated for all the tests conducted: Lignin materials produce around 150% higher current densities at −1.8 V, applied at cathode, and around 35% higher at −2.3 V. It is a fact that Pruning B. Lignin did not give the same current response as the commercial lignin.…”

Section: (A) (B)supporting

confidence: 59%

“…These materials present the ability to reduce the overpotential for H Cellulose, hemicelluloses, and lignin are the main components of the pl linked together by a highly ordered matrix called lignocellulose. In fact, ligni studied for the fulfilment of this goal [34][35][36][37][38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

“…For instance, Khalid et al [40] have used Ni foam to perform a study on the effect of the flow rate on the current response in comparison with water electrolysis. Beliaeva et al [36] employed Ni nanoparticles to explore the oxidation in an AEM electrolyser with lignin material and a model molecule (2-phenoxyethanol).…”

Section: Introductionmentioning

confidence: 99%

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Clean H2 Production by Lignin-Assisted Electrolysis in a Polymer Electrolyte Membrane Flow Reactor

et al. 2023

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Biomass-derived products, such as lignin, are interesting resources for energetic purposes. Lignin is a natural polymer that, when added to the anode of an alkaline exchange membrane water electrolyser, enhances H2 production rates and efficiencies due to the substitution of the oxygen evolution reaction. Higher efficiencies are reported when different catalytic materials are employed for constructing the lignin anolyte, demonstrating that lower catalytic loadings for the anode improves the H2 production when compared to higher loadings. Furthermore, when a potential of −1.8 V is applied, higher gains are obtained than when −2.3 V is applied. An increase of 200% of H2 flow rates with respect to water electrolysis is reported when commercial lignin is used coupled with Pt-Ru at 0.09 mg cm−2 and E = −1.8 V is applied at the cathode. This article provides deep information about the oxidation process, as well as an optimisation of the method of the lignin electro-oxidation in a flow-reactor as a pre-step for an industrial implementation.

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Section: (A) (B)supporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

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Clean H2 Production by Lignin-Assisted Electrolysis in a Polymer Electrolyte Membrane Flow Reactor

et al. 2023

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“…Ni-based catalysts have been proven as one of the most effective catalysts in many thermocatalytic processes for lignin conversion. It is also reported to be active towards many electrochemical oxidation processes involving C–C bond cleavage and oxidation, such as methanol oxidation, 43 lignin oxidation, 44 and lignin electro-oxidative depolymerization. 45 However, the effectiveness of Ni-based catalysts in lignin fuel cells remains unexplored.…”

Section: Introductionmentioning

confidence: 99%

Efficient direct lignin fuel cells enabled by hierarchical nickel–iron phosphide nanosheets as an anode catalyst

Liu

Lusi

Radhakrishnan

et al. 2022

Sustainable Energy Fuels

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“…[8,9] A serious drawback of this material is its toxicity and the fact that high potentials are necessary to drive the reaction at meaningful rates. Very often commercial materials have been studied, [5][6][7][10][11][12][13] especially Ni, [11,12,[14][15][16] which limits the scope of materials to explore for this reaction to what is available on the market.…”

Section: Introductionmentioning

confidence: 99%

Design‐of‐Experiments‐Based Optimisation of Vanillin Yield from Kraft Lignin Using Pulse Electrolysis and Thermolysis

Brix,

Otávio Orzari,

Krysiak

et al. 2024

ChemElectroChem

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The electrification of the production of fine chemicals has received increased interest in combating petrochemical routes with a high carbon footprint. Oxidising biomass from waste streams with concomitant hydrogen production, such as the transformation of lignin to vanillin, would be a great asset. Here, we show the combination of activity screening using a scanning droplet cell on a thin‐film Ni−Fe library and performance testing in a flow‐through cell with pulse electrolysis. The identified optimal Ni−Fe material composition was prepared on Ni foam with a polymer/metal precursor spray method. Full factorial and Doehlert matrix designs were employed to better comprehend each parameter‘s effects on the complex system. The best conditions for the electrooxidation of Kraft lignin at room temperature were at E1st=1.36 V vs RHE, t1st=1 s for the first pulse and E2nd=1.60 V vs RHE and t2nd=15 s for the second pulse, leading to the significantly improved production of 2.15 μmols of vanillin at room temperature. Pulsed chronopotentiometry was demonstrated to be a cost‐effective and robust technique with a simple setup for the valorisation of Kraft lignin. Combined with a subsequent thermolysis step, 8.05 μmols of vanillin were obtained.

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New insights into lignin electrolysis on nickel-based electrocatalysts: Electrochemical performances before and after oxygen evolution

Cited by 23 publications

References 70 publications

Clean H2 Production by Lignin-Assisted Electrolysis in a Polymer Electrolyte Membrane Flow Reactor

Clean H2 Production by Lignin-Assisted Electrolysis in a Polymer Electrolyte Membrane Flow Reactor

Efficient direct lignin fuel cells enabled by hierarchical nickel–iron phosphide nanosheets as an anode catalyst

Design‐of‐Experiments‐Based Optimisation of Vanillin Yield from Kraft Lignin Using Pulse Electrolysis and Thermolysis

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