Synthesis and Evaluation of Ni Catalysts Supported on BaCe0.5Zr0.3−xY0.2NixO3−δ with Fused-Aggregate Network Structure for the Hydrogen Electrode of Solid Oxide Electrolysis Cell

Nishikawa, Ryosuke; Kakinuma, Katsuyoshi; Nishino, Hanako; Brito, Manuel E.; Gopalan, Srikanth; Uchida, Hiroyuki

doi:10.3390/catal7070223

Cited by 4 publications

(3 citation statements)

References 44 publications

(77 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This observation is similar to that in a previous report of a Ni(np) catalyst supported on BCZYN(fans), without the use of Ni(fans). 20) The Ni(np) also formed close contacts with the BCZYN(fans), as shown in Fig. 4(c).…”

Section: Characterization Of Samplesmentioning

confidence: 84%

“…18), 19) Our group has also applied these DL concepts [CL, Ni(np) dispersed on porous mixed protonicallyelectronically conductive (MPEC) oxides with CCLs] to the hydrogen electrode of proton-conducting SOCs. 20) The performance of the DL hydrogen electrode was higher than that of a conventional composite electrode of Ni and MPEC oxide and was expected to be enhanced further by improvement of the CL's electronic conductivity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and evaluation of double-layer electrodes using a Ni–BaCe0.50Zr0.27Y0.20Ni0.03O3−δ cermet with a fused-aggregate network structure as the hydrogen electrode of solid oxide cells

Nishikawa

Nishino

Brito

et al. 2018

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

We have evaluated double-layer hydrogen electrodes with catalyst layers (CLs) and current-collecting layers (CCLs) in order to apply them in proton-conducting solid oxide cells. The scaffolds of the CLs were fabricated from a composite of mixed protonically-electronically conductive (MPEC) perovskite oxide BaCe 0.50 Zr 0.27 Y 0.20-Ni 0.03 O 3¹¤ (BCZYN) and Ni on a BaCe 0.10 Zr 0.70 Y 0.20 O 3¹¤ electrolyte. Both powders were synthesized via a flame oxide-synthesis method and both had a unique microstructure, i.e., a fused-aggregate network structure [BCZYN(fans), Ni(fans)]. This unique structure was constructed from both a network of particles fused with their nearest neighbors and pores surrounded by the fused particles. This structure was found to be favorable for constructing both electronically conductive pathways and gas diffusion pathways in the CLs. Highly dispersed Ni nanoparticles [Ni(np)] were also loaded on the MPEC of BCZYN(fans) in the CLs. Composite CCLs of micrometer-sized BaCe 0.50 Zr 0.30 Y 0.20 O 3¹¤ and Ni were also fabricated on the CLs. The catalytic activity of a hydrogen electrode using a CL comprising a composite of BCZYN(fans) and Ni(fans) was higher than that of a CL comprising BCZYN(fans) at a Ni(np) loading amount of 30 vol.% due to the improvement of the electronic conductivity in CLs by Ni(fans). The catalytic activity of the hydrogen electrode using the CLs increased with increases in the Ni(np) loading amount, moreover, and reached saturation at around 30 vol.% due to relief from the effect of the depletion layer on the outer surface of BCZYN(fans).

show abstract

Section: Characterization Of Samplesmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Synthesis and evaluation of double-layer electrodes using a Ni–BaCe0.50Zr0.27Y0.20Ni0.03O3−δ cermet with a fused-aggregate network structure as the hydrogen electrode of solid oxide cells

Nishikawa

Nishino

Brito

et al. 2018

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, a new class of materials corresponding to "exsolved perovskite" has been recently used as fuel electrodes for SOC cells [37][38][39][40][41][42][43]. These materials have a unique morphology based on a substrate with mixed ionic and electronic conductivity (MIEC) supporting encapsulated fine particles that originate from the segregation of metals from the MIEC's bulk [44,45].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Ni-Modified LSFCO Promoting Layer on the Gas Produced through Co-Electrolysis of CO2 and H2O at Intermediate Temperatures

2021

View full text Add to dashboard Cite

The co-electrolysis of CO2 and H2O at an intermediate temperature is a viable approach for the power-to-gas conversion that deserves further investigation, considering the need for green energy storage. The commercial solid oxide electrolyser is a promising device, but it is still facing issues concerning the high operating temperatures and the improvement of gas value. In this paper we reported the recent findings of a simple approach that we have suggested for solid oxide cells, consisting of the addition of a functional layer coated to the fuel electrode of commercial electrochemical cells. This approach simplifies the transition to the next generation of cells manufactured with the most promising materials currently developed, and improves the gas value in the outlet stream of the cell. Here, the material in use as a coating layer consists of a Ni-modified La0.6Sr0.4Fe0.8Co0.2O3, which was developed and demonstrated as a promising fuel electrode for solid oxide fuel cells. The results discussed in this paper prove the positive role of Ni-modified perovskite as a coating layer for the cathode, since an improvement of about twofold was obtained as regards the quality of gas produced.

show abstract

3D Self‐Architectured Steam Electrode Enabled Efficient and Durable Hydrogen Production in a Proton‐Conducting Solid Oxide Electrolysis Cell at Temperatures Lower Than 600 °C

Ding

Zhang

et al. 2018

Advanced Science

View full text Add to dashboard Cite

Hydrogen production via water electrolysis using solid oxide electrolysis cells (SOECs) has attracted considerable attention because of its favorable thermodynamics and kinetics. It is considered as the most efficient and low‐cost option for hydrogen production from renewable energies. By using proton‐conducting electrolyte (H‐SOECs), the operating temperature can be reduced from beyond 800 to 600 °C or even lower due to its higher conductivity and lower activation energy. Technical barriers associated with the conventional oxygen‐ion conducting SOECs (O‐SOECs), that is, hydrogen separation and electrode instability that is primarily due to the Ni oxidation at high steam concentration and delamination associated with oxygen evolution, can be remarkably mitigated. Here, a self‐architectured ultraporous (SAUP) 3D steam electrode is developed for efficient H‐SOECs below 600 °C. At 600 °C, the electrolysis current density reaches 2.02 A cm−2 at 1.6 V. Instead of fast degradation in most O‐SOECs, performance enhancement is observed during electrolysis at an applied voltage of 1.6 V at 500 °C for over 75 h, attributed to the “bridging” effect originating from reorganization of the steam electrode. The H‐SOEC with SAUP steam electrode demonstrates excellent performance, promising a new prospective for next‐generation steam electrolysis at reduced temperatures.

show abstract

Synthesis and Evaluation of Ni Catalysts Supported on BaCe0.5Zr0.3−xY0.2NixO3−δ with Fused-Aggregate Network Structure for the Hydrogen Electrode of Solid Oxide Electrolysis Cell

Cited by 4 publications

References 44 publications

Synthesis and evaluation of double-layer electrodes using a Ni–BaCe<sub>0.50</sub>Zr<sub>0.27</sub>Y<sub>0.20</sub>Ni<sub>0.03</sub>O<sub>3−δ</sub> cermet with a fused-aggregate network structure as the hydrogen electrode of solid oxide cells

Synthesis and evaluation of double-layer electrodes using a Ni–BaCe<sub>0.50</sub>Zr<sub>0.27</sub>Y<sub>0.20</sub>Ni<sub>0.03</sub>O<sub>3−δ</sub> cermet with a fused-aggregate network structure as the hydrogen electrode of solid oxide cells

The Effect of Ni-Modified LSFCO Promoting Layer on the Gas Produced through Co-Electrolysis of CO2 and H2O at Intermediate Temperatures

3D Self‐Architectured Steam Electrode Enabled Efficient and Durable Hydrogen Production in a Proton‐Conducting Solid Oxide Electrolysis Cell at Temperatures Lower Than 600 °C

Contact Info

Product

Resources

About