Hydrogen adsorption on nitrogen-doped carbon xerogels

被引：119

作者：

Kang, Kyung Yeon ^{[1
]}

Lee, Burtrand I. ^{[1
,2
]}

Lee, Jae Sung ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Chem Engn, Ecofriendly Catalysis & Energy Lab NRL, Pohang 790784, South Korea

[2] Clemson Univ, Sch Mat Sci & Engn, Clemson, SC 29634 USA

来源：

CARBON | 2009年 / 47卷 / 04期

关键词：

HIGH-SURFACE-AREA; STORAGE CAPACITY; AEROGELS; NANOSTRUCTURES; NANOTUBES;

D O I：

10.1016/j.carbon.2009.01.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nitrogen-doped (1.2-4.5 wt%) carbon xerogels were synthesized from carbonization of resorcinol-formaldehyde polymer in an ammonia atmosphere at various temperatures. The textural properties and the chemical nature of nitrogen in the nitrogen-doped carbon xerogels were analyzed by Ar adsorption/desorption isotherms and X-ray photoelectron spectroscopy, respectively. The maximum hydrogen uptakes were measured to be 3.2 wt% at -196 degrees C and 0.28 wt% at 35 degrees C. Hydrogen adsorption had a stronger correlation with specific surface area than nitrogen content at the low temperature of -196 degrees C. At the higher temperature of 35 degrees C, optimal nitrogen doping enhanced hydrogen adsorption by electronic modification of carbon in agreement with previous theoretical predictions. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1171 / 1180

页数：10