A simple approach to uniform PdAg alloy membranes: Comparative study of conventional and silver concentration-controlled co-plating

Handle URI:
http://hdl.handle.net/10754/575706
Title:
A simple approach to uniform PdAg alloy membranes: Comparative study of conventional and silver concentration-controlled co-plating
Authors:
Zeng, Gaofeng; Shi, Lei; Liu, Yunyang; Zhang, Yanfeng; Sun, Yuhan
Abstract:
An Ag-controlled co-plating method was developed for the preparation of palladium/silver alloy membranes on porous tubular alumina supports. By controlling the feed rate of Ag to the Pd bath, the concentration of the silver in the plating bath was restricted during the course of plating. As a result, preferential deposition of silver at the beginning was suppressed and uniform dispersion of silver inside the membrane with silver composition in the desired range was achieved. Ultrathin (∼2.5 μm) PdAg alloy membranes with uniform silver composition of ∼25% were successfully obtained. The membrane showed a hydrogen permeance of 0.88 mol m-2 s-1 and pure-gas H2/N2 selectivity of 2140 at 823 K with ΔP = 100 kPa. Only one hydride phase existed in the studied temperature range from 373 to 823 K with ΔPH=100kPa. Direct comparisons with the conventional simply-mixed co-plating method showed that membranes made by the novel Ag-controlled co-plating method had much more uniform silver distribution, smoother surface, denser membrane structure, higher utilization rate of metal sources, and shorter alloying time. © 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
KAUST Department:
SABIC - Corporate Research and Innovation Center (CRI) at KAUST; Advanced Membranes and Porous Materials Research Center
Publisher:
Elsevier BV
Journal:
International Journal of Hydrogen Energy
Issue Date:
Mar-2014
DOI:
10.1016/j.ijhydene.2014.01.022
Type:
Article
ISSN:
03603199
Sponsors:
The authors acknowledge financial support partially from National 863 Project (No: 2012AA050104) and Advanced Coal Processing Project of Chinese Academic Sciences (No: XDA0704 0401). The authors thank Prof. Lai Z. for fruitful discussions.
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Advanced Membranes and Porous Materials Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorZeng, Gaofengen
dc.contributor.authorShi, Leien
dc.contributor.authorLiu, Yunyangen
dc.contributor.authorZhang, Yanfengen
dc.contributor.authorSun, Yuhanen
dc.date.accessioned2015-08-24T08:36:14Zen
dc.date.available2015-08-24T08:36:14Zen
dc.date.issued2014-03en
dc.identifier.issn03603199en
dc.identifier.doi10.1016/j.ijhydene.2014.01.022en
dc.identifier.urihttp://hdl.handle.net/10754/575706en
dc.description.abstractAn Ag-controlled co-plating method was developed for the preparation of palladium/silver alloy membranes on porous tubular alumina supports. By controlling the feed rate of Ag to the Pd bath, the concentration of the silver in the plating bath was restricted during the course of plating. As a result, preferential deposition of silver at the beginning was suppressed and uniform dispersion of silver inside the membrane with silver composition in the desired range was achieved. Ultrathin (∼2.5 μm) PdAg alloy membranes with uniform silver composition of ∼25% were successfully obtained. The membrane showed a hydrogen permeance of 0.88 mol m-2 s-1 and pure-gas H2/N2 selectivity of 2140 at 823 K with ΔP = 100 kPa. Only one hydride phase existed in the studied temperature range from 373 to 823 K with ΔPH=100kPa. Direct comparisons with the conventional simply-mixed co-plating method showed that membranes made by the novel Ag-controlled co-plating method had much more uniform silver distribution, smoother surface, denser membrane structure, higher utilization rate of metal sources, and shorter alloying time. © 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipThe authors acknowledge financial support partially from National 863 Project (No: 2012AA050104) and Advanced Coal Processing Project of Chinese Academic Sciences (No: XDA0704 0401). The authors thank Prof. Lai Z. for fruitful discussions.en
dc.publisherElsevier BVen
dc.subjectCo-depositionen
dc.subjectCo-platingen
dc.subjectElectroless platingen
dc.subjectHydrogen separationen
dc.subjectPdAg alloy membranesen
dc.titleA simple approach to uniform PdAg alloy membranes: Comparative study of conventional and silver concentration-controlled co-platingen
dc.typeArticleen
dc.contributor.departmentSABIC - Corporate Research and Innovation Center (CRI) at KAUSTen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.identifier.journalInternational Journal of Hydrogen Energyen
dc.contributor.institutionCAS Key Laboratory of Low-carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, Chinaen
dc.contributor.institutionState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, Chinaen
kaust.authorLiu, Yunyangen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.