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

Gaofeng Zeng; Lei Shi; Yunyang Liu; Yanfeng Zhang; Yuhan Sun

doi:10.1016/j.ijhydene.2014.01.022

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

Gaofeng Zeng, Lei Shi, Yunyang Liu, Yanfeng Zhang, Yuhan Sun

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

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.

Original language	English (US)
Pages (from-to)	4427-4436
Number of pages	10
Journal	International Journal of Hydrogen Energy
Volume	39
Issue number	9
DOIs	https://doi.org/10.1016/j.ijhydene.2014.01.022
State	Published - Mar 2014
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: 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.

ASJC Scopus subject areas

Energy Engineering and Power Technology
Condensed Matter Physics
Fuel Technology
Renewable Energy, Sustainability and the Environment

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijhydene.2014.01.022

Cite this

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

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. {\textcopyright} 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",

author = "Gaofeng Zeng and Lei Shi and Yunyang Liu and Yanfeng Zhang and Yuhan Sun",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: 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.",

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T1 - A simple approach to uniform PdAg alloy membranes: Comparative study of conventional and silver concentration-controlled co-plating

AU - Zeng, Gaofeng

AU - Shi, Lei

AU - Liu, Yunyang

AU - Zhang, Yanfeng

AU - Sun, Yuhan

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: 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.

PY - 2014/3

Y1 - 2014/3

N2 - 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.

AB - 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.

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 9

ER -

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

Abstract

Bibliographical note

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UN SDGs

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