Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2018-04-05

Journal: ADVANCED ENERGY MATERIALS

Included Journals: EI、SCIE

Volume: 8

Issue: 10

ISSN: 1614-6832

Key Words: electrocatalysts; FeOOH; metal-organic frameworks; oxygen evolution reaction; porous carbon

Abstract: As a cost-effective catalyst for the oxygen evolution reaction (OER), the potential use of FeOOH is hindered by its intrinsic poor electron conductivity. Here, the significant enhancement of OER activity and long-term stability of electrodeposited FeOOH on zeolitic imidazolate framework-derived N-doped porous carbons (NPCs) are reported. In alkaline media, FeOOH/NPC supported on nickel foam as a 3D electrode delivers a current density of 100 mA cm(-2) at a small overpotential of 230 mV and exhibits a low Tafel slope of 33.8 mV dec(-1) as well as excellent durability, making it one of the most active OER catalysts. Such high performance is attributed to a combined effect of the excellent electron conductivity of NPC and the synergy between FeOOH and NiO derived from Ni substrate.