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Dual‐Doping Induced Synergistic Functionality in a Perovskite Air Electrode for Balanced Performance and Durability in Reversible Protonic Ceramic Cells

Xue, Qiang, Wang, Chenxiao, Chen, Ting, Zhang, Guangjun, Yin, Chaofan, Zhang, Fengxue, Zhou, Yucun, Shen, Xuesong, Xu, Lang, Wang, Shaorong·2026·Advanced Energy Materials

DOI 10.1002/aenm.71157

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Abstract

The development of high‐performance air electrodes for reversible protonic ceramic cells (RPCCs) is constrained by the inherent trade‐off between electrocatalytic activity and operational stability. To address this challenge, a dual‐doping strategy was employed to dop Ti and Nb into PrBaCo 2 O 5+δ , resulting in a novel triple‐conducting (H + /O 2− /e − ) perovskite air electrode, PrBaCo 1.8 Ti 0.1 Nb 0.1 O 5+δ (PBCTN). The comprehensive characterization study demonstrates that the PBCTN oxide exhibits outstanding stability under high‐temperature and high‐humidity environments and show a polarization resistance as low as 0.06 Ω cm 2 at 700°C. Density functional theory calculations reveal that optimized hydration energy, a more favorable O 2p band center, and accelerated surface reactions enhance the oxygen reduction and evolution kinetics. Through this design, the RPCC with the PBCTN air electrode achieves a peak power density of 1.12 W cm −2 at 700°C in fuel cell mode and a current density of 3.1 A cm −2 at 1.3 V in electrolysis mode, along with stable operation for over 380 h. This work provides insights into concurrently enhancing both activity and stability in electrocatalysts for advanced energy conversion technologies.

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Wang, M., Wang, W. “., Li, J., Gao, Y., Liu, C., & Li, C. (2025) · International Journal of Hydrogen Energy · doi:10.1016/j.ijhydene.2025.02.432 · Cited by 6
Research Progress on Proton-conducting Solid Oxide Fuel Cells with Hydrogen-containing Fuel
Xue, Z., Chaofan, Y. I. N., Yuechao, Y. A. O., Wang, Y., Sun, Y., Liu, Z., Yucun, Z. H. O. U., Zhou, J., & Wu, K. (2025) · Journal of Inorganic Materials · doi:10.15541/jim20250132 · Cited by 1
Self-citation

Research works printed but not linked: 4

10.1038/s41467‐020‐15677‐z · DOI · Paper page
10.1038/s41467‐022‐29866‐5 · DOI
10.1088/2632‐959X/ad472d · DOI
10.1088/0953‐8984/22/44/445501 · DOI

Authors: Xue, Q., Wang, C., Chen, T., Zhang, G., Yin, C., Zhang, F., Zhou, Y., Shen, X., Xu, L., & Wang, S.
Venue: Advanced Energy Materials
Publisher: Wiley
Published: 2026-06-02
Volume: 16
Issue: 29
ISSN: 1614-6832
1614-6840
DOI: 10.1002/aenm.71157
Cited by: 2
References: 80
Language: en
Licence: onlinelibrary.wiley.com/termsAndConditions#vor (vor)
doi.wiley.com/10.1002/tdm_license_1.1 (tdm)
Funders: National Natural Science Foundation of China (52572283, 52472270)

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Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.

Dual‐Doping Induced Synergistic Functionality in a Perovskite Air Electrode for Balanced Performance and Durability in Reversible Protonic Ceramic Cells

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