Hydrogen separation by nanocrystalline titanium nitride membranes with high hydride ion conductivity

Kura, Chiharu; Kunisada, Yuji; Tsuji, Etsushi; Chen, Zhu; Habazaki, H.; Nagata, Shinji; Müller, Michael; Souza, Roger A. De; Aoki, Yoshitaka

doi:10.1038/s41560-017-0002-2

Cited by 47 publications

(55 citation statements)

References 59 publications

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“…This peculiar behavior was observed and quantitatively described in HfN [ 12 ], used as a component of multilayer membranes for the isotope separation of hydrogen, and in TiN [ 13 , 14 , 15 ], and confirmed by DFT (Density Functional Theory) calculations conducted on TiN x . The most recent studies verified H permeability experimentally; it was attributed to the formation of Ti-H terminal groups on the surface of crystallites in nanocrystalline matrices and the subsequent diffusion of H - through the boundary-grain interphase.…”

Section: Introductionmentioning

confidence: 58%

Production Strategies of TiNx Coatings via Reactive High Power Impulse Magnetron Sputtering for Selective H2 Separation

et al. 2021

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This scientific work aims to optimize the preparation of titanium nitride coatings for selective H2 separation using the Reactive High Power Impulse Magnetron Sputtering technology (RHiPIMS). Currently, nitride-based thin films are considered promising membranes for hydrogen. The first series of TiNx/Si test samples were developed while changing the reactive gas percentage (N2%) during the process. Obtained coatings were extensively characterized in terms of morphology, composition, and microstructure. A 500 nm thick, dense TiNx coating was then deposited on a porous alumina substrate and widely investigated. Moreover, the as-prepared TiNx films were heat-treated in an atmosphere containing hydrogen in order to prove their chemical and structural stability; which revealed to be promising. This study highlighted how the RHiPIMS method permits fine control of the grown layer’s stoichiometry and microstructure. Moreover, it pointed out the need for a protective layer to prevent surface oxidation of the nitride membrane by air and the necessity to deepen the study of TiNx/alumina interface in order to improve film/substrate adhesion.

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Section: Introductionmentioning

confidence: 58%

Production Strategies of TiNx Coatings via Reactive High Power Impulse Magnetron Sputtering for Selective H2 Separation

et al. 2021

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“…Metallic transition metal nitrides (TMNs) represented by molybdenum nitride (MoN), tungsten nitride (WN), vanadium nitride (VN), etc. have electronic structures similar to those of platinum-group elements, and therefore exhibit remarkable catalysis, sensing and energy storage properties, and have shown considerable advantage in reducing costs 1 – 5 . Moreover, TMNs have high electrical conductivity, extremely high mechanical strength, corrosion resistance, and oxidation resistance, so they have attracted more and more research interest in several application fields 6 – 10 .…”

Section: Introductionmentioning

confidence: 99%

General molten-salt route to three-dimensional porous transition metal nitrides as sensitive and stable Raman substrates

Guan

Han

et al. 2021

Nat Commun

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Transition metal nitrides have been widely studied due to their high electrical conductivity and excellent chemical stability. However, their preparation traditionally requires harsh conditions because of the ultrahigh activation energy barrier they need to cross in nucleation. Herein, we report three-dimensional porous VN, MoN, WN, and TiN with high surface area and porosity that are prepared by a general and mild molten-salt route. Trace water is found to be a key factor for the formation of these porous transition metal nitrides. The porous transition metal nitrides show hydrophobic surface and can adsorb a series of organic compounds with high capacity. Among them, the porous VN shows strong surface plasmon resonance, high conductivity, and a remarkable photothermal conversion efficiency. As a new type of corrosion- and radiation-resistant surface-enhanced Raman scattering substrate, the porous VN exhibits an ultrasensitive detection limit of 10−11 M for polychlorophenol.

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“…require a lower activation energy to transport through solid-state crystal structures and associated interfaces due to the small ionic radius and the absence of an electron cloud as compared to other conducting ionic species such as oxygen ions (O 2-) [1]. Due to the combination of performance, efficiency, and stability in the lower temperature range, proton-conducting ceramics (PCCs) have attracted significant interest for applications in energy conversion [2][3][4][5][6][7][8], energy storage [9], electrochemical sensors [10], and advanced gas separations [11][12][13][14][15]. In addition, there has been recent interest in PCCs as enabling technologies in the nuclear industry, including their use as PCCs for tritium sequestration, electrolysis, and separations [16].…”

Section: Introductionmentioning

confidence: 99%

Review: recent progress in low-temperature proton-conducting ceramics

et al. 2019

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Proton-conducting ceramics (PCCs) are of considerable interest for use in energy conversion and storage applications, electrochemical sensors, and separation membranes. PCCs that combine performance, efficiency, stability, and an ability to operate at low temperatures are particularly attractive. This review summarizes the recent progress made in the development of low-temperature protonconducting ceramics (LT-PCCs), which are defined as operating in the temperature range of 25-400°C. The structure of these ceramic materials, the characteristics of proton transport mechanisms, and the potential applications for LT-PCCs will be summarized with an emphasis on protonic conduction occurring at interfaces. Three temperature zones are defined in the LT-PCC operating regime based on the predominant proton transfer mechanism occurring in each zone. The variation in material properties, such as crystal structure, conductivity, microstructure, fabrication methods required to achieve the requisite grain size distribution, along with typical strategies pursued to enhance the proton conduction, is addressed. Finally, a perspective regarding applications of these materials to low-temperature solid oxide fuel cells, hydrogen separation membranes, and emerging areas in the nuclear industry including off-gas capture and isotopic separations is presented.

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Hydrogen separation by nanocrystalline titanium nitride membranes with high hydride ion conductivity

Cited by 47 publications

References 59 publications

Production Strategies of TiNx Coatings via Reactive High Power Impulse Magnetron Sputtering for Selective H2 Separation

Production Strategies of TiNx Coatings via Reactive High Power Impulse Magnetron Sputtering for Selective H2 Separation

General molten-salt route to three-dimensional porous transition metal nitrides as sensitive and stable Raman substrates

Review: recent progress in low-temperature proton-conducting ceramics

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