Proton-conducting yttrium-doped barium cerate ceramics synthesized by a cost-effective solid-state reactive sintering method

Tong, Jianhua; Clark, Daniel; Bernau, Lisa; Subramaniyan, Archana; O’Hayre, Ryan

doi:10.1016/j.ssi.2010.08.022

Cited by 119 publications

(83 citation statements)

References 35 publications

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“…Among them, yttrium-doped barium cerate perovskite type oxide (BaCe 1¹x Y x O 3¹¤ ), the one substituted zirconium to cerium (BaCe 1¹x¹y Zr y Y x O 3¹¤ ), and other perovskite type oxides were used as an electrolyte material. 18) As electrode materials, a silver-palladium (AgPd) electrode was often applied for a cathode that NH 3 is synthesized from N 2 and proton at first.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical synthesis of ammonia using a proton conducting solid electrolyte and nickel cermet electrode

Shimoda

Kobayashi

Kimura

et al. 2017

J. Ceram. Soc. Japan

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Electrochemical synthesis of ammonia (NH 3 ) using a proton conducting solid electrolyte and nickel (Ni) cermet electrodes has been studied. As an electrolyte, BaCe 0.9 Y 0.1 O 3¹¤ (BCY) perovskite-type oxide was prepared by a co-precipitation method and its electrolyte pellet was synthesized by the sintering method with small amount of nickel oxide (NiO) as a sintering aid. The NiBCY cermet was employed as electrodes of anode and cathode. To evaluate the performance of this cell, electrochemical synthesis of NH 3 from dry nitrogen (N 2 ) and wet hydrogen (H 2 ) was conducted at 500°C. As a result, the maximum formation rate of NH 3 was 3.36 © 10 ¹10 mol s ¹1 cm ¹2 at the applied voltage of ¹0.2 V against open circuit voltage using the NiBCY«BCY(NiO)«NiBCY cell, and the Faradic efficiency was 0.63%. Durability test of NH 3 electrochemical synthesis from dry N 2 and wet H 2 revealed that current density of cell was relatively stable for 15 h but NH 3 formation rate was decreased slightly. In addition, using NiBCY based cell, NH 3 was successfully synthesized from dry N 2 and steam diluted argon with the applied voltage of ¹1.8 V at a rate of 2.79 © 10 ¹10 mol s ¹1 cm ¹2 and the Faradic efficiency was 0.15%. And this fabricated cell kept the high NH 3 formation rate during the long-term test at ¹2.0 V for 15 h.

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Section: Introductionmentioning

confidence: 99%

Electrochemical synthesis of ammonia using a proton conducting solid electrolyte and nickel cermet electrode

Shimoda

Kobayashi

Kimura

et al. 2017

J. Ceram. Soc. Japan

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“…Furthermore, the doped barium cerates have been prepared by different methods such as co-precipitation, polymeric solgel, solid-state reaction, and solution combustion synthesis [8]. However, the main challenge is to avoid the formation of barium carbonate during high temperature processing or in humid atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Structural, morphological and electrical studies of BaCe0.8Y0.2O3-δ synthesized by solution combustion method

Jadhav

Dubal

Jamale

et al. 2014

Ionics

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The 20 % yttrium doped barium cerate (BCY20) powder has been synthesized by cost effective solution combustion method. The flame temperature measured by pyrometer was 1055°C, less than the adiabatic temperature due to various losses. The phase formation and evolution was studied with TG-DTA and XRD. The carbonate free orthorhombic BCY20 phase was obtained upon calcination at 900°C. The microstructure of the powders and sintered pellet was examined through scanning electron microscopy. The vibrational mode at 355 cm, characteristics of CeO 6 octahedra, was detected in Raman while the bands corresponding to M-O vibrations were revealed in FT-IR. The dc conductivities of sintered pellet measured in argon and air atmospheres at 600°C were 1.53×10 −3 and 1.41×10 −3 S/cm.

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“…During reactive sintering, the presence of NiO leads to accelerated sintering of materials and formation of singlephase BCZY27 from the parent materials during high-temperature co-sintering. By combining the formation of singlephase BCZY with cell fabrication, reactive sintering has the potential to significantly reduce cell-fabrication costs [35]. Reactive sintering has also been demonstrated with yttria-stabilized zirconia for solid-oxide fuel cell applications [36,37].…”

Section: Cell Fabricationmentioning

confidence: 99%

Fabrication and Performance of Tubular, Electrode‐Supported BaCe_0.2Zr_0.7Y_0.1O_3–δ Fuel Cells

et al. 2013

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In this report, we describe fabrication and electrochemical‐performance testing of tubular, anode‐supported fuel cells based on the protonic ceramic BaCe0.2Zr0.7Y0.1O3–δ (BCZY27). These devices are comprised of a 20‐μm‐thick BCZY27 electrolyte spray‐coated and co‐fired onto an extruded, tubular 9.8‐mm‐diameter, 1.25‐mm‐thick 65 wt.% NiO/35 wt.% BCZY27 anode support. Reactive sintering with NiO forms the BCZY27 material from parent oxides. An La0.6Sr0.4 Co0.2Fe0.8O3–δ (LSCF) cathode is applied following co‐sintering. While anode supports can be extruded to 3‐m lengths, the active area of the cells tested here is 7.5 cm2. Performance is quantified through polarization measurements across a range of temperatures with hydrogen‐air reactants. Peak power ranges from 78 to 189 mW cm–2 over the 700–850 °C temperature range. Open‐circuit voltage decreases with increasing operating temperature due to the co‐diffusion of the multiple charge carriers present. The ionic transference number is determined over a range operating temperatures and anode‐gas compositions, and is found to range from 0.77 to 0.88. Finally, an external power supply is used to drive hydrogen across the BCZY27 membrane. At an applied current density of 1 A cm–2 and 700 °C operating temperature, hydrogen flux is measured at 7.5 smL min–1 cm–2 active area.

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Proton-conducting yttrium-doped barium cerate ceramics synthesized by a cost-effective solid-state reactive sintering method

Cited by 119 publications

References 35 publications

Electrochemical synthesis of ammonia using a proton conducting solid electrolyte and nickel cermet electrode

Electrochemical synthesis of ammonia using a proton conducting solid electrolyte and nickel cermet electrode

Structural, morphological and electrical studies of BaCe0.8Y0.2O3-δ synthesized by solution combustion method

Fabrication and Performance of Tubular, Electrode‐Supported BaCe_0.2Zr_0.7Y_0.1O_3–δ Fuel Cells

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Proton-conducting yttrium-doped barium cerate ceramics synthesized by a cost-effective solid-state reactive sintering method

Cited by 119 publications

References 35 publications

Electrochemical synthesis of ammonia using a proton conducting solid electrolyte and nickel cermet electrode

Electrochemical synthesis of ammonia using a proton conducting solid electrolyte and nickel cermet electrode

Structural, morphological and electrical studies of BaCe0.8Y0.2O3-δ synthesized by solution combustion method

Fabrication and Performance of Tubular, Electrode‐Supported BaCe0.2Zr0.7Y0.1O3–δ Fuel Cells

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Product

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Fabrication and Performance of Tubular, Electrode‐Supported BaCe_0.2Zr_0.7Y_0.1O_3–δ Fuel Cells