Chlorine doped K2NiF4-type oxide as an efficient oxygen reduction catalyst for protonic ceramic fuel cells

IF 6.7 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2025-05-27 DOI:10.1016/j.fuel.2025.135812

Shujun Peng , Yan Chen , Xingyao Liu , Song Lei , Jian Xue

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引用次数: 0

Abstract

Protonic ceramic fuel cells (PCFCs) operated at medium temperatures have attracted plenty of researches due to their many advantages, such as high efficiency for energy conversion, easier sealing, catabatic material aging, no attenuation of fuel and so on. However, the industrial application of PCFCs is greatly fettered by the development of high-performance cathodes with superior oxygen reduction reaction (ORR) kinetics. In this work, a chlorine doped K₂NiF₄-type oxide named as Pr_1.8La_0.2Ni_0.74Cu_0.21Ga_0.05O₄₊_δCl_0.1 (PLNCGCl_0.1) is developed as the cathode for PCFC according to the BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ (BZCYYb) electrolyte, which demonstrates enhanced ORR kinetics, as corroborated by a series of structural analysis and electrochemical characterizations. Theoretical simulations have shown that doping Cl not only favors interstitial oxygen formation thermodynamically, but also alleviates the kinetic energy hurdle associated with the oxygen reduction reaction’s critical rate-determining step. An anode-supported PCFC with PLNCGCl_0.1 as the cathode outputs peak power density (PPD) of 1.162 W cm⁻² and the polarization resistance (R_p) is 0.069 Ω cm² at 700 °C. This work paves an efficient venue for the development of active and durable K₂NiF₄-type cathode by Cl-doping with high ORR kinetics.

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氯掺杂k2nif4型氧化物作为质子陶瓷燃料电池的高效氧还原催化剂

在中温环境下工作的质子陶瓷燃料电池（pcfc）由于具有能量转换效率高、易于密封、材料不老化、燃料不衰减等优点而引起了广泛的研究。然而，具有优异氧还原反应（ORR）动力学的高性能阴极的开发极大地阻碍了pcfc的工业应用。本文根据BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb)电解质，制备了一种氯掺杂的k2nif4型氧化物Pr1.8La0.2Ni0.74Cu0.21Ga0.05O4+δ cl0.1 （PLNCGCl0.1）作为PCFC的阴极，并通过一系列的结构分析和电化学表征证实了其ORR动力学的增强。理论模拟表明，掺杂Cl不仅有利于间隙氧的形成，而且可以缓解与氧还原反应的临界速率决定步骤相关的动能障碍。以PLNCGCl0.1为阴极的阳极负载PCFC在700℃时输出峰值功率密度（PPD）为1.162 W cm−2，极化电阻（Rp）为0.069 Ω cm2。本研究为开发具有高ORR动力学的活性和耐用的k2nif4型阴极铺平了有效的途径。

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.