Oxidized Laser-Induced Graphene for Efficient Oxygen Electrocatalysis

被引：131

作者：

Zhang, Jibo ^{[1
]}

Ren, Muqing ^{[1
]}

Wang, Luqing ^{[2
]}

Li, Yilun ^{[1
]}

Yakobson, Boris I. ^{[1
,2
,3
,4
]}

Tour, James M. ^{[1
,2
,3
,4
]}

机构：

[1] Rice Univ, Dept Chem, 6100 Main St, Houston, TX 77005 USA

[2] Rice Univ, Dept Mat Sci & NanoEngn, 6100 Main St, Houston, TX 77005 USA

[3] Rice Univ, Smalley Curl Inst, 6100 Main St, Houston, TX 77005 USA

[4] Rice Univ, NanoCarbon Ctr, 6100 Main St, Houston, TX 77005 USA

来源：

ADVANCED MATERIALS | 2018年 / 30卷 / 21期

关键词：

electrocatalysis; laser-induced graphene; oxygen evolution reaction; oxygen reduction reaction; DOPED CARBON NANOMATERIALS; METAL-AIR BATTERIES; EVOLUTION REACTION; REDUCTION REACTION; FREE CATALYSTS; SURFACE; OXIDATION; NANOTUBES; CHEMISTRY; OXIDES;

D O I：

10.1002/adma.201707319

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An efficient metal-free catalyst is presented for oxygen evolution and reduction based on oxidized laser-induced graphene (LIG-O). The oxidation of LIG by O-2 plasma to form LIG-O boosts its performance in the oxygen evolution reaction (OER), exhibiting a low onset potential of 260 mV with a low Tafel slope of 49 mV dec(-1), as well as an increased activity for the oxygen reduction reaction. Additionally, LIG-O shows unexpectedly high activity in catalyzing Li2O2 decomposition in Li-O-2 batteries. The overpotential upon charging is decreased from 1.01 V in LIG to 0.63 V in LIG-O. The oxygen-containing groups make essential contributions, not only by providing the active sites, but also by facilitating the adsorption of OER intermediates and lowering the activation energy.

引用

页数：7

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