A modified Nafion membrane with extremely low methanol permeability via surface coating of sulfonated organic silica.
We developed a method to significantly decrease the methanol permeability of a Nafion membrane that does not require sacrificing its proton conductivity and mechanical stability. The Nafion membrane modified by the coating of a thin layer of sulfonated organic silica on the membrane surface exhibits significantly decreased methanol permeability--the permeability is decreased to an undetectable level--while retaining an acceptable ionic conductivity of 0.029 S cm(-1).
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
Yuwei
Y
Zhang
Weiwei
W
Cai
Fengzhan
F
Si
Junjie
J
Ge
Liang
L
Liang
Changpeng
C
Liu
Wei
W
Xing