Layer-structured triple-conducting electrocatalyst for water-splitting in protonic ceramic electrolysis cells: Conductivities vs. activity

Li, Wenyuan; Guan, Bo; Yang, Tao; Li, Zhongqiu; Shi, Wangying; Tian, Hanchen; Ma, Liang; Kalapos, Thomas; Liu, Xingbo

doi:10.1016/j.jpowsour.2021.229764

Cited by 18 publications

(15 citation statements)

References 65 publications

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“…The occurrence and protonic transport by help of interstitial hydroxide ions would be distinctly different from conventional protonic transport in perovskite-type oxides. Although some oxygen-excess RP oxides (e.g., La 2 NiO 4+δ and Pr 2 NiO 4+δ ) have been tested as oxygen electrodes in PCECs, [18,25,26] the role of interstitial oxide ions in the incorporation and conduction of protons have neither been studied experimentally nor computationally. [27] In this work, we have studied the role of interstitial oxide ions in the incorporation and migration of protons in the La 2 NiO 4+δ system by theoretical calculations accompanied by hydration and transport measurements.…”

Section: Introductionmentioning

confidence: 99%

Protonic Conduction in La₂NiO₄₊_δ and La_2‐_xA_xNiO₄₊_δ (A = Ca, Sr, Ba) Ruddlesden–Popper Type Oxides

Zhong

Toyoura

Jiang

et al. 2022

Advanced Energy Materials

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A significant hydration and protonic conduction in La2NiO4+δ‐based Ruddlesden–Popper (RP) oxides will enable their use as positrode materials in proton ceramic electrochemical cells (PCECs). Unlike perovskite electrolytes and positrode materials, where protons reside and jump on regular oxide ions, RP oxides such as La2NiO4+δ may contain oxygen interstitials and offer the possibility that protons locate on and migrate by help of these, suggesting a mechanism by which positrodes may operate by triple conduction. Here, theoretical calculations that support proton migration between interstitial oxide ions in the rock‐salt layer via unshared oxide ions in the perovskite layer are reported. Furthermore, water contents of pristine La2NiO4+δ and La2‐xAxNiO4+δ (A = Ca, Sr, Ba) are reported, showing that hydration increases with the level and basicity of the dopant. Hebb‐Wagner blocking electrode measurements show significant partial protonic conductivity in all samples. The effects of doping on hydration and of pH2O on the p‐type conductivity suggest that protons reside primarily on structural oxide ion, but a role of interstitial oxide ions for dissolution and migration of protons cannot be ruled out in cases with oxygen excess. The results are instructive for further studies and optimization of RP oxides as potential positrode materials for PCECs.

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Section: Introductionmentioning

confidence: 99%

Protonic Conduction in La₂NiO₄₊_δ and La_2‐_xA_xNiO₄₊_δ (A = Ca, Sr, Ba) Ruddlesden–Popper Type Oxides

Zhong

Toyoura

Jiang

et al. 2022

Advanced Energy Materials

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“…Zhou et al [104] compared the conductivity of Sr 2 Sc 0.1 Nb 0.1 Co 1.5 Fe 0.3 O 6-δ (SSNCF) with that of BSCF, suggesting the non-conflicting dual-ion (H + and O 2– ) diffusion channels within SSNCF bulk increased the proton conductivity and significantly improved the performance. Li et al [105] investigated Pr 2-x Ba x NiO 4+δ (PBNO) materials, demonstrating the increased proton conduction from Ba substitution was crucial to performance improvement. Staring from BSCF, PBCO, and PNO, extensive efforts have been devoted to increasing the electrochemical performance of these TCOs.…”

Section: Mixed Conducting Air Electrode Materialsmentioning

confidence: 99%

Protonic ceramic materials for clean and sustainable energy: advantages and challenges

Tian

Luo

Song

et al. 2023

International Materials Reviews

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In recent years, the hydrogen economy has been strongly favoured by governmental and industrial bodies worldwide. A tremendous number of papers are published every year on different aspects of protonic ceramic electrochemical cells (PCECs) due to their lower operation temperature, easier reversible operation, and brighter prospects for further development. While new progress is being made continuously, many critical challenges remain. The effort on PCEC investigation could be more aligned for greater collective impact, e.g. the academic community could devote more effort to overdue critical problems but less to incremental improvements. This review aims to provide some insightful perspectives on critical challenges facing the development of PCECs, to sort out priorities in future effort, and to suggest promising directions to pursue. In this way, it is hoped that the technical readiness level of PCECs might advance more quickly, toward field demonstrations and commercialization for a clean and sustainable energy era.

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“…54 The air electrode should possess excellent conduction and exchange properties for H + /O 2− /e − and remain stable under PCFC operating conditions. [55][56][57] By combining different phases with specic functionalities, such as bulk proton conduction, oxygen surface exchange, and triple conducting capabilities, materials with improved performance characteristics for PCFC applications are developed. In this section, we discuss the importance of designing nanocomposite materials with multiple phases to achieve enhanced performance and stability in PCFC electrodes.…”

Section: Nanocomposites In Air Electrodesmentioning

confidence: 99%

Nanocomposite electrodes as a new opportunity to transform the performance of solid oxide cells

Li,

Zhou,

et al. 2023

J. Mater. Chem. A

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Layer-structured triple-conducting electrocatalyst for water-splitting in protonic ceramic electrolysis cells: Conductivities vs. activity

Cited by 18 publications

References 65 publications

Protonic Conduction in La₂NiO₄₊_δ and La_2‐_xA_xNiO₄₊_δ (A = Ca, Sr, Ba) Ruddlesden–Popper Type Oxides

Protonic Conduction in La₂NiO₄₊_δ and La_2‐_xA_xNiO₄₊_δ (A = Ca, Sr, Ba) Ruddlesden–Popper Type Oxides

Protonic ceramic materials for clean and sustainable energy: advantages and challenges

Nanocomposite electrodes as a new opportunity to transform the performance of solid oxide cells

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Layer-structured triple-conducting electrocatalyst for water-splitting in protonic ceramic electrolysis cells: Conductivities vs. activity

Cited by 18 publications

References 65 publications

Protonic Conduction in La2NiO4+δ and La2‐xAxNiO4+δ (A = Ca, Sr, Ba) Ruddlesden–Popper Type Oxides

Protonic Conduction in La2NiO4+δ and La2‐xAxNiO4+δ (A = Ca, Sr, Ba) Ruddlesden–Popper Type Oxides

Protonic ceramic materials for clean and sustainable energy: advantages and challenges

Nanocomposite electrodes as a new opportunity to transform the performance of solid oxide cells

Contact Info

Product

Resources

About

Protonic Conduction in La₂NiO₄₊_δ and La_2‐_xA_xNiO₄₊_δ (A = Ca, Sr, Ba) Ruddlesden–Popper Type Oxides

Protonic Conduction in La₂NiO₄₊_δ and La_2‐_xA_xNiO₄₊_δ (A = Ca, Sr, Ba) Ruddlesden–Popper Type Oxides