膜
石墨烯
质子
氧化物
材料科学
电化学
电导率
电化学能量转换
纳米技术
电极
化学
物理
生物化学
量子力学
物理化学
冶金
作者
Yiqing Wang,Siegfried Eigler
标识
DOI:10.1002/anie.202412669
摘要
Stacked graphene oxide (GO) proton membranes are promising candidates for use in energy devices due to their proton conductivity. Identification of through‐plane channels in these membranes is critical but challenging due to their anisotropic nature. Here, we present an electrochemical reduction method for identifying and quantifying through‐plane proton channels in GO membranes. The simplicity lies in the operando optical observation of the change in contrast as GO is electrochemically reduced. Here, we find three proton‐dominated three‐phase interfaces, which are critical for the reduction reactions of GO membranes. Based on these findings, a method is proposed to identify and quantify through‐plane channels in stacked GO proton membranes using a simple three‐electrode device in combination with real‐time imaging of the membrane surface.
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