Traditional electrolysis of water produces hydrogen with a purity of ∼98%. Using ion transport membranes to prevent the migration of oxygen (O2) from the anode to the cathode, the purity of H2 can be increased to ∼99.8%, but it still cannot fulfill the requirement for use in fuel cells (>99.97%). Here, we report that modifying a commercial ionic membrane (Nafion) with carbon dots (CDs) can further inhibit O2 permeation across the membrane, while effectively improving its ion transportability. The key to achieve these effects is the rational design and proper loading of the CDs, which narrows the pore size of the membrane from ∼4 nm to
|Original language||English (US)|
|Journal||ACS Applied Materials & Interfaces|
|State||Published - Aug 16 2021|
Bibliographical noteKAUST Repository Item: Exported on 2021-08-19
Acknowledgements: This work was supported by the open fund of the key laboratory of advanced functional polymer materials, the ministry of education (KLFPM202001) and the National Natural Science Foundation of China (grant no: 22078245).
ASJC Scopus subject areas
- Materials Science(all)