Practical H₂ supply from ammonia borane enabled by amorphous iron domain.

ABSTRACT: 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-Fe₂O₃ Foam) can achieve AB catalytic performances and stability (turnover frequency (TOF) of 113.6 min^-1, about 771 L H₂ in 900 h, and 43.27 mL/(min·cm²) for 10×10 cm² of Foam) that outperform reported benchmarks (most <14 L H₂ in 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 H

SUBMITTER: Chen Y 

PROVIDER: S-EPMC11496879 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature