Electrochemical hydrogen production from humid air using cation-modified graphene oxide membranes

Nur Laila Hamidah, Masataka Shintani, Aynul Sakinah Ahmad Fauzi, Shota Kitamura, Elaine G. Mission, Kazuto Hatakeyama, Mitsuru Sasaki, Armando T. Quitain, Tetsuya Kida*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Water electrolysis is an environment-friendly process of producing hydrogen with zero-carbon emission. Herein, we studied the water vapor electrolysis using a proton-conducting membrane composed of graphene oxide (GO) nanosheets intercalated with cations (Al3+ and Ce3+). We examined the effect of cation introduction on the physical and chemical structures, morphology, thermal and chemical stabilities, and the proton conductivity of stacked GO nanosheet membranes by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoemission spectroscopy (XPS), Raman spectroscopy, atomic force microscopy (AFM), dynamic light scattering (DLS), thermogravimetric-differential thermal analysis (TG-DTA), and electrochemical impedance spectroscopy (EIS). Concentration cell measurements revealed that the cation-modified membranes are pure proton conductors at room temperature. The proton conductivity of a GO membrane was much improved by cation modification. The cation-modified GO membranes, sandwiched with Pt/C electrodes as the cathode and anode, electrolyzed humidified air to produce hydrogen at room temperature, indicating the feasibility of this carbon-based electrochemical device.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalPure and Applied Chemistry
Issue number1
Publication statusPublished - 1 Jan 2021


  • Cations
  • ICGC-8
  • graphene oxide
  • proton conductor
  • water vapor electrolysis


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