期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 1, 页码 1267-1273出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b17612
关键词
multi-shelled structure; hollow structure; composition effect; bi-metallic phosphides; hydrogen evolution reaction
资金
- National Key Research and Development Program of China [2017YFA0206500]
- National Natural Science Foundation of China [21671014, 21571012]
- Fundamental Research Funds for the Central Universities [buctrc201522]
Active nonprecious metal-based hydrogen evolution reaction (HER) electrocatalysts are critical for the clean and sustainable generation of hydrogen. Here, we synthesized multishelled FeCo@FeCoPpC hollow spheres by the carbonization and phosphorization of the FeCo-MIL-88 metal-organic framework. Owing to both composition (FeCo mixed phosphide) and morphology (multishelled morphology) effects, the as-obtained FeCo@FeCoP@C exhibits excellent HER performance with a low overpotential of 65 mV to achieve an HER current density of 10 mA cm(-2) and high stability in acidic solution. Density functional theory calculations show that the FeCoP have the optimal hydrogen absorption energy than that of FeP and CoP. The carbon shell prevents the oxidation of the phosphides, and the FeCo core provides better conductivity. Our work provides a new method to synthesize multishelled structure catalysts, which has potential applications in the further hydrogen production.
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