题目：

Practical H₂supply from ammonia borane enabled by amorphous iron domain

作者：

Yufeng Chen^1#, Zhongling Lang^2#, Kun Feng¹, KangWang¹, Yang guang Li², Zhenhui Kang¹, Lin Guo³*, Jun Zhong¹*, Jun Lu^4,5*

单位：

¹Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, China.

²Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, China.

³School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology, Beihang University, Beijing, China.

⁴College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.

⁵Quzhou Institute of Power Battery and Grid Energy Storage, Quzhou, China.

摘要：

Efficient catalysis of ammonia borane (AB) holds potential for realizing controlled energy release from hydrogen fuel and addressing cost challenges faced by hydrogen storage. Here, we report that amorphous domains on metallic Fe crystal structures (R-Fe₂O₃Foam) can achieve AB catalytic performances and stability (turnover frequency (TOF) of 113.6 min⁻¹, about 771 L H₂in 900 h, and 43.27 mL/(min·cm²) for 10×10 cm²of Foam) that outperform reported benchmarks (most <14 L H₂in 45 h) by at least 20 times. These notable increases are enabled by the stable Fe crystal structure, while defects and unsaturated atoms in the amorphous domains form Fe-B intermediates that significantly lower the dissociation barriers of H₂O and AB. Given that the catalyst lifetime is a key determinant for the practical use in fuel cells, our R-Fe₂O₃Foam also provides decent H₂supply (180 mL H₂/min, AB water solution of 7.5 wt% H₂) in a driven commercial car fuel cell at stable power outputs (7.8 V and 1.6 A for at least 5 h). When considered with its facile synthesis method, these materials are potentially very promising for realizing durable high-performance AB catalysts and viable chemical storage in hydrogen powered vehicles.

影响因子：

14.7

分区情况：

一区

链接：

https://doi.org/10.1038/s41467-024-53574-x