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Technical Brief

Protonic Mobility of Neodymium Tungstate

[+] Author and Article Information
Vladislav A. Sadykov

Boreskov Institute of Catalysis SB RAS,
pr. Akad. Lavrentieva 5,
Novosibirsk 630090, Russia;
Laboratory of New Technologies of Functional
Nanostructured Materials Synthesis,
Department of Physics,
Novosibirsk State University,
Pirogova str. 2,
Novosibirsk 630090, Russia
e-mail: sadykov@catalysis.ru

Yulia N. Bespalko

Boreskov Institute of Catalysis SB RAS,
pr. Akad. Lavrentieva 5,
Novosibirsk 630090, Russia
e-mail: bespalko@catalysis.ru

Svetlana N. Pavlova

Boreskov Institute of Catalysis SB RAS,
pr. Akad. Lavrentieva 5,
Novosibirsk 630090, Russia
e-mail: pavlova@catalysis.ru

Pavel I. Skriabin

Boreskov Institute of Catalysis SB RAS,
pr. Akad. Lavrentieva 5,
Novosibirsk 630090, Russia
e-mail: ivanovich1401@gmail.com

Alexey V. Krasnov

Boreskov Institute of Catalysis SB RAS,
pr. Akad. Lavrentieva 5,
Novosibirsk 630090, Russia
e-mail: leadenskyes@gmail.com

Nikita F. Eremeev

Boreskov Institute of Catalysis SB RAS,
pr. Akad. Lavrentieva 5,
Novosibirsk 630090, Russia
e-mail: yeremeev21@gmail.com

Tamara A. Krieger

Boreskov Institute of Catalysis SB RAS,
pr. Akad. Lavrentieva 5,
Novosibirsk 630090, Russia;
Laboratory of New Technologies of Functional
Nanostructured Materials Synthesis,
Department of Physics,
Novosibirsk State University,
Pirogova str. 2,
Novosibirsk 630090, Russia
e-mail: krieger@catalysis.ru

Ekaterina M. Sadovskaya

Boreskov Institute of Catalysis SB RAS,
pr. Akad. Lavrentieva 5,
Novosibirsk 630090, Russia;
Laboratory of New Technologies of Functional
Nanostructured Materials Synthesis,
Department of Physics,
Novosibirsk State University,
Pirogova str. 2,
Novosibirsk 630090, Russia
e-mail: sadovsk@catalysis.ru

Vladimir D. Belyaev

Boreskov Institute of Catalysis SB RAS,
pr. Akad. Lavrentieva 5,
Novosibirsk 630090, Russia
e-mail: belyaev@catalysis.ru

Zakhar S. Vinokurov

Boreskov Institute of Catalysis SB RAS,
pr. Akad. Lavrentieva 5,
Novosibirsk 630090, Russia;
Laboratory of New Technologies of Functional
Nanostructured Materials Synthesis,
Department of Physics,
Novosibirsk State University,
Pirogova str. 2,
Novosibirsk 630090, Russia
e-mail: vinzux@mail.ru

1Corresponding author.

Manuscript received April 3, 2017; final manuscript received September 16, 2017; published online October 10, 2017. Assoc. Editor: San Ping Jiang.

J. Electrochem. En. Conv. Stor. 14(4), 044501 (Oct 10, 2017) (4 pages) Paper No: JEECS-17-1037; doi: 10.1115/1.4037957 History: Received April 03, 2017; Revised September 16, 2017

This work aims at studying protonic transport of mixed proton–electron-conducting Nd5.5WO11.25-δ oxide synthesized by a citrate method as material for hydrogen separation membranes. Structure of samples was characterized by X-ray diffraction (XRD), and protonic mobility was studied using temperature-programmed desorption of H2O and isotope heteroexchange of the bulk protons with D2O as well as mass relaxation after an abrupt change of H2O partial pressure. The temperature range of Nd5.5WO11.25-δ efficient operation is 300–400 °C, where H+ tracer diffusion and chemical diffusion coefficients are ∼1 × 10−11 and ∼2 × 10−5 cm2/s, respectively, being comparable to or even better than those for similar systems. Hence, Nd5.5WO11.25-δ is a promising material for the design of hydrogen separation membranes.

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References

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Figures

Grahic Jump Location
Fig. 1

XRD patterns for Nd5.5WO11.25-δ samples sintered at 700–1300 °С

Grahic Jump Location
Fig. 2

H2O TPD curve for Nd5.5WO11.25-δ sample sintered at 1100 °C

Grahic Jump Location
Fig. 3

D2O isotopic exchange curve at T = 380 °C for the sample sintered at 1100 °C, P(D2O) = 0.08 Torr. Points–experiment, line–model.

Grahic Jump Location
Fig. 4

Normalized mass relaxation curve obtained at 350 °C (2 → 10 mbar H2O jump) for the sample sintered at 1300 °C. Points–experiment, line–model.

Grahic Jump Location
Fig. 5

Mass relaxation curve and its fitting by the model with two relaxation processes obtained at 300 °C for pelletized NW-20 sample sintered at 1300 °C. Points–experiment, lines–modeling.

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