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

Authors
  • Hamidah, Nur Laila1, 2
  • Shintani, Masataka1
  • Ahmad Fauzi, Aynul Sakinah1
  • Kitamura, Shota1
  • Mission, Elaine G.1
  • Hatakeyama, Kazuto3
  • Sasaki, Mitsuru4
  • Quitain, Armando T.5
  • Kida, Tetsuya6
  • 1 Graduate School of Science and Technology, Kumamoto University, 860-8555 , (Japan)
  • 2 Institut Teknologi Sepuluh Nopember, 60111 , (Indonesia)
  • 3 Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 305-8565 , (Japan)
  • 4 Institute of Pulsed Power Science, Kumamoto University, Japan , (Japan)
  • 5 College of Cross-Cultural and Multidisciplinary Studies, Kumamoto University, Japan , (Japan)
  • 6 Kumamoto University, Japan , (Japan)
Type
Published Article
Journal
Pure and Applied Chemistry
Publisher
Walter de Gruyter GmbH
Publication Date
Jan 11, 2021
Volume
93
Issue
1
Pages
1–11
Identifiers
DOI: 10.1515/pac-2019-0807
Source
De Gruyter
Keywords
License
Yellow

Abstract

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.

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