Premium
Nitrogen and Sulfur Codoped Graphite Foam as a Self‐Supported Metal‐Free Electrocatalytic Electrode for Water Oxidation
Author(s) -
Yu Xiaowen,
Zhang Miao,
Chen Ji,
Li Yingru,
Shi Gaoquan
Publication year - 2016
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201501492
Subject(s) - overpotential , oxygen evolution , materials science , tafel equation , electrode , catalysis , sulfur , current collector , graphite , chemical engineering , water splitting , inorganic chemistry , electrocatalyst , electrochemistry , composite material , metallurgy , chemistry , organic chemistry , photocatalysis , electrolyte , engineering
The oxidation of water to produce oxygen gas is related to a variety of energy storage systems. Thus, the development of efficient, cheap, durable, and scalable electrocatalysts for oxygen evolution reaction (OER) is of great importance. Here, a high‐performance OER catalyst, nitrogen and sulfur codoped graphite foam (NSGF) is reported. This NSGF is prepared from commercial graphite foil and directly applied as an electrocatalytic electrode without using a current collector and a polymeric binder. It exhibits an extremely low overpotential of 0.380 V to reach a current density of 10 mA cm −2 and shows fast kinetics with a small Tafel slope of 96 mV dec −1 in 0.1 m KOH. This electrocatalytic performance is superior or comparable to those of previously reported metal‐free OER catalysts.