In-situ Formed Catalysts for Active, Durable, and Thermal-stable Ammonia Protonic Ceramic Fuel Cells at 550 oC

Hua Zhang, Kang Xu, Yangsen Xu, Fan He, Feng Zhu, Sasaki Kotaro, YongMan Choi*, Yu Chen*

*此作品的通信作者

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

Ammonia protonic ceramic fuel cells (NH3-PCFCs) are promising and attractive energy-conversion devices owing to their high energy density, zero-carbon emission, and safety. The development of NH3-PCFCs, however, depends largely on the insufficient activity and poor durability of typical Ni-based anodes for ammonia decomposition, especially at low temperatures such as 550 °C. Herein, we report a self-assembled heterostructured Ru0.95Cu0.05Nix (RCN) catalyst obtained through an in situ reaction between the surface-decorated Ru0.95Cu0.05 nanoparticles and the Ni grain in the anode under typical processing conditions. At 550 °C, Ni–BaZr0.1Ce0.7Y0.1Yb0.1O3 anode-supported PCFCs with RCN catalysts exhibit a high peak power density of 0.732 W cm−2 and a significantly enhanced durability of 100 h in NH3. Moreover, the cells demonstrate improved thermal stability compared with the bare cell during a 31-cycle thermal cycling test in NH3 between 550 and 700 °C. The enhanced performance is likely attributed to the synergistic effects of Ru and Cu in RCN for NH3 decomposition, resulting in a more vital interaction of NH3 than that of the bare anode surfaces, as confirmed by NH3 thermal conversion, electrochemical performance, and theoretical simulations.
原文American English
期刊Energy and Environmental Science
發行號10
DOIs
出版狀態E-pub ahead of print - 2024

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