Induced Potential in Porous Carbon Films through Water Vapor Absorption

被引：223

作者：

Liu, Kang ^{[1
,2
]}

Yang, Peihua ^{[1
,2
]}

Li, Song ^{[3
]}

Li, Jia

Ding, Tianpeng ^{[1
,2
]}

Xue, Guobin ^{[1
,2
]}

Chen, Qian ^{[1
,2
]}

Feng, Guang ^{[3
]}

Zhou, Jun ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China

[2] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Hubei, Peoples R China

[3] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 28期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

adsorption; humidity; porous carbon; proton transfer; H2O ADSORPTION; GENERATION; DRIVEN; PERFORMANCE; TRANSPORT; ACTUATOR; ENERGY; FIBER; FLOW;

D O I：

10.1002/anie.201602708

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Sustainable electrical potential of tens of millivolts can be induced by water vapor adsorption on a piece of porous carbon film that has two sides with different functional group contents. Integrated experiments, and Monte Carlo and ab initio molecular dynamics simulations reveal that the induced potential originates from the nonhomogeneous distribution of functional groups along the film, especially carboxy groups. Sufficient adsorbed water molecules in porous carbon facilitate the release of protons from the carboxy groups, resulting in a potential drop across the carbon film because of the concentration difference of the released free protons on the two sides. The potential utilization of such a phenomenon is also demonstrated by a self-powered humidity sensor.

引用

页码：8003 / 8007

页数：5

共 27 条

[21] Enhanced gas-flow-induced voltage in graphene [J].