期刊
CHEMSUSCHEM
卷 9, 期 21, 页码 3049-3053出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201600904
关键词
cobalt; electrocatalysis; graphenes; hydrogen; porous materials
资金
- National Natural Science Foundation of China [21375123]
- Ministry of Science and Technology of China [2013YQ170585]
The development of non-precious-metal hydrogen evolution reaction (HER) electrocatalysts with high activity and excellent durability in acidic media is of significant importance for renewable energy research. We report a novel electrocatalyst based on a three-dimensional (3D) graphene aerogel decorated with cobalt phosphide nanoparticles (CoP/GA). The material has a unique hierarchical porous structure with CoP nanoparticles encapsulated uniformly within the graphene sheets. The optimized catalyst shows superior activity, with an overpotential of only 121 mV at 10 mA cm(-2), a Tafel slope of 50 mV dec(-1), and an exchange current density of 0.105 mA cm(-2), and it maintains its catalytic activity for at least 13 h. More importantly, this work provides a versatile way for the rational design and fabrication of 3D graphene-based multifunctional composite materials.
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