Isotopic effect of proton conductivity in barium zirconates for various hydrogen-containing atmospheres

Hossain, M. Khalid; Yamamoto, Takayuki; Hashizume, Kazuyoshi

doi:10.1016/j.jallcom.2022.163957

Cited by 15 publications

(8 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High defect energy and consequent hindrance to intrinsic disorder accounts for the high chemical stability in BaZrO 3 -based PCs under reducing environments. As a result, Hossain et al 263 examined the chemical characteristics of Ydoped BaZrO 3 under dry and wet H 2 and argon (Ar) atmospheres. The measured conductivity resembles the predictions of considerable difference between dry and wet atmospheres.…”

Section: Impact Of Diverse Atmospheric Conditions Over Chemical Insta...mentioning

confidence: 99%

Technological Challenges and Advancement in Proton Conductors: A Review

Vignesh

Rout

2023

Energy Fuels

View full text Add to dashboard Cite

Proton conductors (PCs) are multifunctional perovskite materials with structural, electrical, and chemical compatibilities that serve as principal components in proton conducting solid oxide fuel cells (PC-SOFC). The synergetic advantages of PC-SOFC dominate lucrative applications of conventional SOFC. However, adequate advantages accompany certain key limitations in PCs. The inverse interplay between proton conductivity and chemical stability are two broader challenges which demonstrate a clear trade-off. As a consequence, different reactive constituents within the host BaCeO 3 and BaZrO 3 PCs enforce the gradient in chemical stability under diverse atmospheres, while altered charge chemistry and structural perturbations escalate the activation barrier and impose reduced proton conductivity. Such occurrences are more pronounced in acceptor-doped PCs. Although material engineering via acceptor defect substitutions assists protonation and charge dynamics, on the other hand, it provokes novel challenges (proton trapping effect) at a higher dopant volume fraction beyond the threshold. The principal entropy among chemical and electrophysical parameters is proportionally associated with dopant-incorporated subcategorical material limitations. In this study, a compilation of factors responsible for structural and electrophysical diversities as a consequence of compositional-induced symmetry variations is highlighted with a plausible conclusion and future research perspectives for smart and advanced energy applications.

show abstract

Section: Impact Of Diverse Atmospheric Conditions Over Chemical Insta...mentioning

confidence: 99%

Technological Challenges and Advancement in Proton Conductors: A Review

Vignesh

Rout

2023

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…Recently, Hossain et al reviewed the proton-conducting BZO perovskites in terms of material science and computational engineering. These in-depth focused reviews on the physical characteristics of barium zirconate from experimental and theoretical studies will help to perform future research in this sector. − Hossain et al also experimentally studied SOFC electrolyte materials preparation in different sintering conditions , and conductivity measurements in various hydrogen-containing atmospheres − for the BaZr 0·9 Y 0·1 O 3‑α (BZY), BaZr 0·955 Y 0·03 Co 0·015 O 3‑α (BZYC), and Gd 2 O 3 sintered pellets. Last, but not least, very recent studies show that SOFC electrodes associated with multiple REOs have also shown promising characteristics, such as resistance to sulfur poisoning and stable degradation behavior at high temperatures, which are desirable in fuel cell applications. , Specific applications of REOs in SOFCs are given in Table .…”

Section: Applications and Prospects Of Rare Earth Oxidesmentioning

confidence: 99%

Current Applications and Future Potential of Rare Earth Oxides in Sustainable Nuclear, Radiation, and Energy Devices: A Review

Hossain

Raihan

Akbar

et al. 2022

ACS Appl. Electron. Mater.

Self Cite

101

View full text Add to dashboard Cite

To date, rare earth oxides (REOs) have proven to be key components in generating sustainable energy solutions, ensuring environmental safety and economic progress due to their diverse attributes. REOs' exceptional optical, thermodynamic, and chemical properties have made them indispensable in a variety of sophisticated technologies, including electric vehicle magnets, portable energy devices, fuel cell catalysts, radiation shielding, dosimetry, and many others. Therefore, the successful incorporation of rare earth elements (REEs) into host materials in controlled concentrations offers competitive advantages to fabricate portable energy devices, radiation sensors, and radiation shielding glasses, as well as to improve the performance of existing photovoltaic cells, which is of great interest to both researchers and industry. As the global demand for REEs grows rapidly, it is critical to comprehend the underlying physics as well as the wider consequences of REEs on sustainable energy and nuclear technologies, both in the near and long term. However, despite their relevance, a focused review on the applications, prospects, and challenges of REOs in photovoltaics, nuclear, and energy devices is still unavailable. To this effort, this review succinctly reports recent experimental studies on eight REOs (R 2 O 3 , R = Yb, Er, Sm, Eu, Y, Gd, Dy, and Ce) and their specific applications and industrial aspects. While several subdomains are reported, the applications of REOs in next-generation solar cells and photovoltaic devices for promoting zero-emission clean energy and rechargeable batteries for electric vehicles (EVs) are the most pioneering ones. Furthermore, REOs' chemical stability and compositional versatility allow them to be used in a variety of high-efficiency energy converters, including solid oxide fuel cells (SOFCs). From the perspective of thermodynamic and structural stability, the gamma and neutron absorptivity of REO-doped (such as Dy 3+ , Eu 3+ , Sm 3+ , Nd 3+ , etc.) glasses shows improved shielding performance in radiation domains. Aside from the applications, the prospects of REOs presented in this article are likely to encourage current and future scholars to pursue a wide range of important studies in the fields of energy and nuclear systems. This review also reports the key challenges (i.e., material degradation, phase transformation, magnetic entropy shift, etc.) associated with REOs in a standalone section. These challenges demand the immediate attention of scientists and engineers for efficient, costeffective, and environmentally sustainable solutions. At the end, future advancement pathways for REO applications are also suggested.

show abstract

“…[21] In contrast, the BaZrO 3 matrix conductor exhibits excellent stability because of its relatively high electronegativity; however, its poor sintering performance results in processing difficulties and low overall electrical conductivity. [22][23][24][25] The BaZrO 3 -BaCeO 3 solid solution is a compromise between stability and conductivity. By adjusting the Ce/Zr ratio and doping ions, such as Y 3þ and Yb 3þ , co-doped BaZrO 3 -BaCeO 3 (such as BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3Àδ ), exhibits high conductivity with high chemical stability; however, the conductivity of this system is still lower than that of BaCeO 3 .…”

Section: Introductionmentioning

confidence: 99%

Tailoring Alkaline Metals Ion‐Doped La₂Ce₂O_7−δ Proton Conductor for Hydrogen Permeation Membranes

Zhang,

Yang,

Wang

et al. 2023

Energy Tech

View full text Add to dashboard Cite

With the extensive use of hydrogen energy, hydrogen separation membranes with proton–electron mixed conductors have broad application prospects in hydrogen separation and purification. Herein, La1.85M0.15Ce2O7−δ (M = Li, Na, K, Rb, and Cs; LMC) proton conductors are prepared. The electron paramagnetic resonance, Raman, and X‐ray photoelectron spectroscopy results indicate that the proposed method of replacing part of the La3+ in La2Ce2O7−δ with alkali metal ions produces more oxygen vacancies, which provides more possibilities for ion transport. Among them, La1.85Rb0.15Ce2O7−δ (LRC) exhibits the highest oxygen vacancy concentration. In addition, as the radius of the alkali metal doping ions increases, the corresponding LMC grains also increase. However, an excessively large ionic radius (Cs+) can hinder grain growth. LRC has the largest ionic radius, indicating that it has a smaller grain boundary resistance. This results in the maximum conductivity of the LRC (2.99 × 10−2 S cm−2) in the atmosphere of wet 20% H2 + 80% N2 at 900 °C. Similarly, in the hydrogen permeability test, the LRC exhibits the highest hydrogen flux (2.74 × 10−9 mol cm−2 s−1) at 900 °C. Moreover, an increase in temperature and hydrogen partial pressure on the feed side can promote hydrogen permeability. Therefore, it is a potential material for ceramic hydrogen separation membranes.

show abstract

Isotopic effect of proton conductivity in barium zirconates for various hydrogen-containing atmospheres

Cited by 15 publications

References 40 publications

Technological Challenges and Advancement in Proton Conductors: A Review

Technological Challenges and Advancement in Proton Conductors: A Review

Current Applications and Future Potential of Rare Earth Oxides in Sustainable Nuclear, Radiation, and Energy Devices: A Review

Tailoring Alkaline Metals Ion‐Doped La₂Ce₂O_7−δ Proton Conductor for Hydrogen Permeation Membranes

Contact Info

Product

Resources

About

Isotopic effect of proton conductivity in barium zirconates for various hydrogen-containing atmospheres

Cited by 15 publications

References 40 publications

Technological Challenges and Advancement in Proton Conductors: A Review

Technological Challenges and Advancement in Proton Conductors: A Review

Current Applications and Future Potential of Rare Earth Oxides in Sustainable Nuclear, Radiation, and Energy Devices: A Review

Tailoring Alkaline Metals Ion‐Doped La2Ce2O7−δ Proton Conductor for Hydrogen Permeation Membranes

Contact Info

Product

Resources

About

Tailoring Alkaline Metals Ion‐Doped La₂Ce₂O_7−δ Proton Conductor for Hydrogen Permeation Membranes