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2026-11-15

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cc-by (c) Vilariño Casaus, Pol et al., 2026
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/231588

Interfacially regulated hierarchical Ni-based electrodes for selective electrocatalytic hydrogenation of biomass-derived platform molecules

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Electrocatalytic hydrogenation of biomass-derived oxygenates is limited by hydrogen evolution, acid-driven degradation of non-noble electrodes, and poor control of gas-evolving interfaces. Hierarchical Ni electrodes were prepared by dynamic hydrogen bubble templating on semiporous stainless steel and coupled with dodecyltrimethylammonium chloride (DTAC) interfacial regulation and Ru decoration. The macroporous, dendritic scaffold supports surface accessibility, reactant transport, and gas release, while DTAC attenuates unproductive proton reduction and improves structural persistence in acidic media. The platform was evaluated for levulinic acid (LA), 5-hydroxymethylfurfural (HMF), and furfural (FF), showing reactant-dependent selectivity. LA reduction was strongly temperature-dependent: 4-hydroxypentanoic acid-rich mixtures dominated at 5 °C, whereas γ-valerolactone (GVL) was favored at 50 °C, reaching 95.8% conversion, 88.7% Faradaic efficiency, and 92.6% GVL selectivity on DTAC-modified Ru-Ni A. HMF mainly yielded 2,5-bis(hydroxymethyl)furan, while FF gave furfuryl alcohol. Density functional theory calculations on clean Ni facets provide qualitative mechanistic context for possible surface-bound LA-to-GVL pathways and their sensitivity to surface geometry and reaction sequence.

Recurs relacionat

https://doi.org/10.1016/j.cej.2026.182025

Matèries

Valorització de Biomassa, Hidrogenació Electroquímica, Electrocatalitzadors estables en mèdi àcid

Matèries (anglès)

Biomass valorization, Electrochemical Hydrogenation, Acid-stable electrocatalysts

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Articles publicats en revistes (Ciència dels Materials i Química Física)
Articles publicats en revistes (Institut de Nanociència i Nanotecnologia (IN2UB))

Citació

VILARIÑO CASAUS, Pol, et al. Interfacially regulated hierarchical Ni-based electrodes for selective electrocatalytic hydrogenation of biomass-derived platform molecules. Chemical Engineering Journal. 2026. Vol. 548, num. 182025, pags. 1-19. ISSN 1385-8947. [consulted: 30 of September of 2026]. Available at: https://hdl.handle.net/2445/231588

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