Cynthia Cibaka-Ndaya , Nicolas Javahiraly , Jacques Jose , Lucian Roiban , Thierry Epicier , Arnaud Brioude
{"title":"Direct determination of the H2 absorption/desorption mechanism in Pd nanoparticles","authors":"Cynthia Cibaka-Ndaya , Nicolas Javahiraly , Jacques Jose , Lucian Roiban , Thierry Epicier , Arnaud Brioude","doi":"10.1016/j.ijhydene.2025.151766","DOIUrl":null,"url":null,"abstract":"<div><div>Palladium, well known for its high affinity with hydrogen, is a promising material for hydrogen storage or sensing applications. To develop such technologies, it is necessary to understand the interactions between palladium and hydrogen. Here, these interactions are studied at the nanoscale from thermodynamic and structural perspectives. In particular, with the aim of acquiring accurate and reliable data, this work shows the development of a new experimental method that allows direct assessment of the effective amount of hydrogen in Pd NPs during sorption processes, in contrast to most reported works that instead probe a parameter that is supposedly proportional to the composition. A custom gas chromatography apparatus was employed, making the proposed approach readily accessible in most materials research facilities. Furthermore, structural investigations by in operando electron energy loss spectroscopy revealed, for the first time, intermediate phases in the metallic to hydride (and reverse) transformations, challenging previously reported sharp phase transitions, thus suggesting a new understanding of the interaction mechanisms between Pd and H<sub>2</sub> at the nanoscale. The results of this work advance the knowledge on palladium – hydrogen systems which can significantly contribute to the development of alternative energy sources.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"182 ","pages":"Article 151766"},"PeriodicalIF":8.3000,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Hydrogen Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S036031992504769X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Palladium, well known for its high affinity with hydrogen, is a promising material for hydrogen storage or sensing applications. To develop such technologies, it is necessary to understand the interactions between palladium and hydrogen. Here, these interactions are studied at the nanoscale from thermodynamic and structural perspectives. In particular, with the aim of acquiring accurate and reliable data, this work shows the development of a new experimental method that allows direct assessment of the effective amount of hydrogen in Pd NPs during sorption processes, in contrast to most reported works that instead probe a parameter that is supposedly proportional to the composition. A custom gas chromatography apparatus was employed, making the proposed approach readily accessible in most materials research facilities. Furthermore, structural investigations by in operando electron energy loss spectroscopy revealed, for the first time, intermediate phases in the metallic to hydride (and reverse) transformations, challenging previously reported sharp phase transitions, thus suggesting a new understanding of the interaction mechanisms between Pd and H2 at the nanoscale. The results of this work advance the knowledge on palladium – hydrogen systems which can significantly contribute to the development of alternative energy sources.
期刊介绍:
The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc.
The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.