Functionalizing Lignin-Based Nanofiber Electrodes with Gold Using Electrochemically Assisted Aqueous Reduction

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Authors

Date

2025-05-19

Department

Department of Chemistry and Materials Science
Department of Chemical and Metallurgical Engineering
Department of Bioproducts and Biosystems

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Mcode

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Language

en

Pages

9

Series

Advanced Materials Interfaces, Volume 12, issue 10

Abstract

This work demonstrates how the electrochemically assisted aqueous reduction (EAR) method can be employed with lignin to prepare functional surfaces from underutilized resources. First, electrospun lignin nanofiber mats are carbonized at 700, 900, and 1100 °C to prepare electrodes with conductivities between 1.1 and 12 S cm−1. The films are then functionalized with EAR, which allows for gold (5 mg L−1) to be selectively deposited as nanoparticles from acidic chloride solutions containing much larger concentrations of copper (20 g L−1), mimicking hydrometallurgical process conditions. The successful functionalization by gold nanoparticles is confirmed by the electrochemical oxidation of ethanol and reduction of carbon dioxide, thus highlighting the use of secondary raw materials in a high added-value application.

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Keywords

electrodeposition, gold nanoparticles, lignin, nanofibers, selective recovery

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DOI

10.1002/admi.202400748

Citation

Herrala, R, Cui, L, Ligt, B, Dufau Mattos, B, Yliniemi, K, Costa Figueiredo, M, Lundström, M & Vapaavuori, J 2025, 'Functionalizing Lignin-Based Nanofiber Electrodes with Gold Using Electrochemically Assisted Aqueous Reduction', Advanced Materials Interfaces, vol. 12, no. 10, 2400748. https://doi.org/10.1002/admi.202400748

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https://urn.fi/URN:NBN:fi:aalto-202505284081

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[article-cris] Kemian tekniikan korkeakoulu / CHEM