Interactions between Hydrogen and Palladium Nanoparticles: Resolving Adsorption and Absorption Contributions
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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15
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ChemElectroChem, Volume 10, issue 6
Abstract
Despite the apparent simplicity of palladium hydride systems, interactions between hydrogen and palladium are multifaceted. Electrochemical hydrogen stripping allows measuring the stoichiometric coefficient of hydrogen atoms inside PdHx structures, whose properties greatly depend on x. In this paper, the insertion of H into Pd nanoparticles has been studied in a three-electrode setup (RDE) and a proton pump cell. An original way of modelling the hydrogen desorption curve is proposed, helping in the separation of hydrogen absorption from other contributions. The loading voltage exhibits the highest impact on the H absorption into Pd, reaching Habs/Pd up to 0.47±0.02 in the RDE setup, at −0.2 VRHE. Conversely, the loading duration presents only little influence in the very first seconds. Finally, maximal Habs/Pd ratios are measured around 30–40 °C, likely due to an optimal balance between the H adsorption rate, and the H diffusion rate into Pd.Description
| openaire: EC/H2020/952184/EU//HERMES Funding Information: This project has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 952184 (HERMES project). Publisher Copyright: © 2023 The Authors. ChemElectroChem published by Wiley-VCH GmbH.
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Moumaneix, L, Rautakorpi, A & Kallio, T 2023, 'Interactions between Hydrogen and Palladium Nanoparticles: Resolving Adsorption and Absorption Contributions', ChemElectroChem, vol. 10, no. 6, e202201109. https://doi.org/10.1002/celc.202201109