Details

Autor(en) / Beteiligte

• Yang, Haihua
• Jiang, Lingjie
• Yan, Jianhui
• Zhang, Li
• Liang, Qingman

Titel

In situ growth of Co0.85Se nanoflakes on Co foam as bifunctional electrocatalysts for water splitting

Ist Teil von

• Journal of materials science. Materials in electronics, 2020-06, Vol.31 (12), p.9385-9393

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Transition metal selenides supported on three-dimensional metal foams have received increasing attention as noble metal-free electrocatalysts for water splitting. Herein, we for the first time present a facile one-pot hydrothermal approach for in situ growth of vertically aligned and interconnected Co 0.85 Se nanoflakes on cobalt foam (denoted as Co 0.85 Se@Co foam). The as-prepared Co 0.85 Se@Co foam demonstrates excellent electrocatalytic activity for hydrogen evolution reaction in alkaline electrolyte, demanding a low overpotential of 100 mV to achieve the current density of 10 mA cm −2 , a Tafel slope of 165 mV dec −1 , and good durability. It also displays good catalytic performance toward oxygen evolution reaction with an overpotential of 360 mV at the current density of 50 mA cm −2 , and a Tafel slope of 81.6 mV dec −1 . The good electrocatalytic performance of Co 0.85 Se@Co foam is largely attributed to the direct growth of active Co 0.85 Se nanoflakes on Co foam with sufficient active sites, the seamless integration of Co 0.85 Se nanoflakes and three-dimensionally porous Co foam substrate for efficient electrons and ions transport.