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Surface activation inspires high performance of ultra-thin Pd membrane for hydrogen separation
Zhu, Bo; Tang, Chun H.; Xu, Heng Y.; Su, Dang S.; Zhang, Jian; Li, Hui; Su, DS; Li, H (reprint author), Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China.; Su, DS (reprint author), Max Planck Gesell, Fritz Haber Inst, Dept Inorgan Chem, Faradayweg 4-6, D-14195 Berlin, Germany.; Su, DS (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 1100016, Peoples R China.; Zhang, J (reprint author), Chinese Acad Sci, Ningbo Inst Ind Technol, Ningbo 315201, Zhejiang, Peoples R China.
2017-03-15
Source PublicationJOURNAL OF MEMBRANE SCIENCE
ISSN0376-7388
Volume526Pages:138-146
AbstractPd-based membranes play a critical role in the field of hydrogen purification and small-scale hydrogen generation. The microstructure and composition of ultra-thin Pd membranes immediately determines their performance and stability, which are however complex and elusive. We applied for the first time a novel technique of environmental scanning electron microscopy (ESEM) together with EDS analysis for in-situ investigation of microstructure and composition of Pd composite membranes under gas-thermal treatment. It enables step by step analysis of the evolution process and offers more meticulous details compared to ex-situ technologies through analysis at exactly the same location of membrane samples. Here we observed the elimination of Pd crystallites as well as the homogenization/diffusion along the whole membrane surface following high T treatment under inert gas or H-2 atmosphere. Gradual evolution of microhillocks on Pd membrane surface was resulted due to alpha-beta phase transition or exposure to either O-2 or H2O, which can be effectively "smoothened" out during H-2 treatment. The exposure to steam exhibited a mild oxidation effect without pinhole formations, which appears a more appropriate surface cleaning process compared to air/oxygen treatment. A significant interlayer diffusion was revealed between Pd layer and ZrO2/alumina substrate in Hz/O-2/H2O atmosphere.; Pd-based membranes play a critical role in the field of hydrogen purification and small-scale hydrogen generation. The microstructure and composition of ultra-thin Pd membranes immediately determines their performance and stability, which are however complex and elusive. We applied for the first time a novel technique of environmental scanning electron microscopy (ESEM) together with EDS analysis for in-situ investigation of microstructure and composition of Pd composite membranes under gas-thermal treatment. It enables step by step analysis of the evolution process and offers more meticulous details compared to ex-situ technologies through analysis at exactly the same location of membrane samples. Here we observed the elimination of Pd crystallites as well as the homogenization/diffusion along the whole membrane surface following high T treatment under inert gas or H-2 atmosphere. Gradual evolution of microhillocks on Pd membrane surface was resulted due to alpha-beta phase transition or exposure to either O-2 or H2O, which can be effectively "smoothened" out during H-2 treatment. The exposure to steam exhibited a mild oxidation effect without pinhole formations, which appears a more appropriate surface cleaning process compared to air/oxygen treatment. A significant interlayer diffusion was revealed between Pd layer and ZrO2/alumina substrate in Hz/O-2/H2O atmosphere.
description.department[zhu, bo] jiangsu greenest new mat technol co ltd, yancheng 224000, peoples r china ; [tang, chun h. ; xu, heng y. ; su, dang s. ; li, hui] chinese acad sci, dalian inst chem phys, dalian 116023, peoples r china ; [su, dang s.] max planck gesell, fritz haber inst, dept inorgan chem, faradayweg 4-6, d-14195 berlin, germany ; [su, dang s.] chinese acad sci, inst met res, shenyang 1100016, peoples r china ; [zhang, jian] chinese acad sci, ningbo inst ind technol, ningbo 315201, zhejiang, peoples r china
KeywordH-2 Separation Pd-based Membranes Microstructure And Composition In-situ Characterizations Gas-thermal Treatment
Subject AreaEngineering, Chemical ; Polymer Science
Funding Organization100-Talent Programme of Chinese Academy of Sciences (CAS, China); National Natural Science Foundation of China [51501177, 21306183]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78234
Collection中国科学院金属研究所
Corresponding AuthorSu, DS; Li, H (reprint author), Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China.; Su, DS (reprint author), Max Planck Gesell, Fritz Haber Inst, Dept Inorgan Chem, Faradayweg 4-6, D-14195 Berlin, Germany.; Su, DS (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 1100016, Peoples R China.; Zhang, J (reprint author), Chinese Acad Sci, Ningbo Inst Ind Technol, Ningbo 315201, Zhejiang, Peoples R China.
Recommended Citation
GB/T 7714
Zhu, Bo,Tang, Chun H.,Xu, Heng Y.,et al. Surface activation inspires high performance of ultra-thin Pd membrane for hydrogen separation[J]. JOURNAL OF MEMBRANE SCIENCE,2017,526:138-146.
APA Zhu, Bo.,Tang, Chun H..,Xu, Heng Y..,Su, Dang S..,Zhang, Jian.,...&Zhang, J .(2017).Surface activation inspires high performance of ultra-thin Pd membrane for hydrogen separation.JOURNAL OF MEMBRANE SCIENCE,526,138-146.
MLA Zhu, Bo,et al."Surface activation inspires high performance of ultra-thin Pd membrane for hydrogen separation".JOURNAL OF MEMBRANE SCIENCE 526(2017):138-146.
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