Electrochemical hydrogen production from humid air using cation-modified graphene oxide membranes
Author:
Hamidah Nur Laila12, Shintani Masataka1, Ahmad Fauzi Aynul Sakinah1, Kitamura Shota1, Mission Elaine G.1, Hatakeyama Kazuto3, Sasaki Mitsuru4, Quitain Armando T.5, Kida Tetsuya6
Affiliation:
1. Department of Applied Chemistry and Biochemistry , Graduate School of Science and Technology, Kumamoto University , Kumamoto 860-8555 , Japan 2. Department of Engineering Physics Institut Teknologi Sepuluh Nopember , Surabaya 60111 , Indonesia 3. Department of Materials and Chemistry , Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba 305-8565 , Japan 4. Institute of Pulsed Power Science, Kumamoto University , Kumamoto , Japan 5. College of Cross-Cultural and Multidisciplinary Studies, Kumamoto University , Kumamoto , Japan 6. Division of Materials Science, Faculty of Advanced Science and Technology , Kumamoto University , Kumamoto , Japan
Abstract
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.
Funder
Kato Foundation for Promotion of Science Ministry of Education, Culture, Sports, Science and Technology Exploratory Research for Advanced Technology
Publisher
Walter de Gruyter GmbH
Subject
General Chemical Engineering,General Chemistry
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