Premium
Induced Potential in Porous Carbon Films through Water Vapor Absorption
Author(s) -
Liu Kang,
Yang Peihua,
Li Song,
Li Jia,
Ding Tianpeng,
Xue Guobin,
Chen Qian,
Feng Guang,
Zhou Jun
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201602708
Subject(s) - adsorption , porosity , carbon fibers , water vapor , materials science , monte carlo method , chemical physics , humidity , molecule , potential difference , absorption (acoustics) , drop (telecommunication) , porous medium , ab initio , relative humidity , ab initio quantum chemistry methods , chemical engineering , nanotechnology , chemistry , composite material , thermodynamics , organic chemistry , physics , electrode , telecommunications , statistics , mathematics , composite number , computer science , engineering
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.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom