Show simple item record

dc.contributor.authorLiu, Jinxia
dc.contributor.authorBellini, Stefano
dc.contributor.authorde Nooijer, Niek C.A.
dc.contributor.authorSun, Yu
dc.contributor.authorPacheco Tanaka, David Alfredo
dc.contributor.authorTang, Chunhua
dc.contributor.authorLi, Hui
dc.contributor.authorGallucci, Fausto
dc.contributor.authorCaravella, Alessio
dc.date.accessioned2019-05-14T10:45:13Z
dc.date.available2019-05-14T10:45:13Z
dc.date.issued2019
dc.identifier.citationLiu, Jinxia, Stefano Bellini, Niek C.A. de Nooijer, Yu Sun, David Alfredo Pacheco Tanaka, Chunhua Tang, Hui Li, Fausto Gallucci, and Alessio Caravella. “Hydrogen Permeation and Stability in Ultra-Thin Pd-Ru Supported Membranes.” International Journal of Hydrogen Energy (April 2019). doi:10.1016/j.ijhydene.2019.03.212.en
dc.identifier.issn0360-3199en
dc.identifier.urihttp://hdl.handle.net/11556/713
dc.description.abstractIn this paper, we report the performance of supported PdRu membranes for possible applications to hydrogen purification and/or production. For this purpose, we fabricated three ultra-thin α-alumina-supported membranes by combined plating techniques: a PdAg membrane (3 μm-thick ca.) and two PdRu (1.8 μm-thick ca.). The former is set as a benchmark for comparison. The membranes were characterised using different methodologies: permeation tests, thermal treatment and SEM analysis. Preliminary leakage tests performed with nitrogen has revealed that the two PdRu membranes, namely PdRu#1 and PdRu#2, show a non-ideal (non-infinite) selectivity, which is relatively low for the former (around 830 at 400 °C) and sufficiently high for the latter (2645 at 400 °C). This indicates a relevant presence of defects in the PdRu#2 membrane, differently from what observed for the PdAg and PdRu#1 ones. The permeation tests show that the hydrogen permeating flux is stable up to around 550 °C, with an apparently unusual behaviour at higher temperatures (600 °C), where we observe a slightly decrease of hydrogen flux with an increase of the nitrogen one. Moreover, a peculiar bubble-shaped structure is observed in the metal layer of all membranes after usage by means of SEM image analysis. This is explained by considering the effect of the Pd-alloy grain surface energy, which tends to minimise the exposed surface area of the grain interface by creating sphere-like bubble in the lattice, similar to what occurs for soap bubbles in water. The above-mentioned decrease in hydrogen flux at 600 °C is explained to be caused by the bubble formation, which pushes the alloy deeper in the support pores.en
dc.description.sponsorshipA. Caravella has received funding through the “Programma Per Giovani Ricercatori «Rita Levi Montalcini»” granted by the “Ministero dell’Istruzione, dell’Universit a e della Ricerca, MIUR” (Grant no. PGR12BV33A), which is gratefully acknowledged. H. Li has received financial support from the 100-Talent Project of CAS, National Natural Science Foundation of China (Grant No. 21676265; 51501177; 21306183), and The Ministry of Science and Technology (MOST) of the People's Republic of China (Grant No. 2016YFE0118300).en
dc.language.isoengen
dc.publisherElsevieren
dc.titleHydrogen permeation and stability in ultra-thin Pd-Ru supported membranesen
dc.typearticleen
dc.identifier.doi10.1016/j.ijhydene.2019.03.212en
dc.rights.accessRightsembargoedAccessen
dc.subject.keywordsHydrogenen
dc.subject.keywordsPd-Ru membranesen
dc.subject.keywordsSurface tensionen
dc.subject.keywordsBubblesen
dc.subject.keywordsThin-layeren
dc.subject.keywordsPurificationen
dc.journal.titleInternational Journal of Hydrogen Energyen


Files in this item

Thumbnail

    Show simple item record