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3D Graphene Aerogels Decorated with Cobalt Phosphide Nanoparticles as Electrocatalysts for the Hydrogen Evolution Reaction
Author(s) -
Zhang Xueping,
Han Yujie,
Huang Liang,
Dong Shaojun
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201600904
Subject(s) - phosphide , cobalt , graphene , materials science , nanoparticle , nanotechnology , electrocatalyst , chemical engineering , chemistry , electrochemistry , nickel , metallurgy , electrode , engineering
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.