1. P-bridged Fe-X-Co coupled sites in hollow carbon spheres for efficient hydrogen generation.
- Author
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Xu, Wenjing, Li, Wei, Liu, Mei, Guo, Xianji, Wen, Hao, and Li, Baojun
- Subjects
- *
INTERSTITIAL hydrogen generation , *HYDROLYSIS kinetics , *PRECIOUS metals , *METAL catalysts , *HYDROGEN production , *SPHERES - Abstract
[Display omitted] Non-precious metals have shown attractive catalytic prospects in hydrogen production from ammonia borane hydrolysis. However, the sluggish reaction kinetics in the hydrolysis process remains a challenge. Herein, P-bridged Fe-X-Co coupled sites in hollow carbon spheres (Fe-CoP@C) has been synthesized through in situ template solvothermal and subsequent surface-phosphorization. Benefiting from the optimized electronic structure induced by Fe doping to enhance the specific activity of Co sites, bimetallic synergy and hollow structure, the as-prepared Fe-CoP@C exhibits superior performances with a turnover frequency (TOF) of 183.5 min−1, and stability of over 5 cycles for ammonia borane hydrolysis, comparable to noble metal catalysts. Theoretical calculations reveal that the P-bridged Fe-X-Co coupled sites on the Fe-CoP@C catalyst surfaces is beneficial to adsorb reactant molecules and reduce their reaction barrier. This strategy of constructing hollow P-bridged bimetallic coupled sites may open new avenues for non-precious metal catalysis. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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