Direct electron transfer-type dual gas diffusion H2/O2 biofuel cells. Issue 22 (18th May 2016)

• Record Type: Journal Article
• Authors: So, Keisei; Kitazumi, Yuki; Shirai, Osamu; Nishikawa, Koji; Higuchi, Yoshiki; Kano, Kenji
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 22(2016)
• Page Start: 8742
• Page End: 8749
• Publication Date: 2016-05-18
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta02654k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : H2 /O2 biofuel cells utilizing hydrogenases and multicopper oxidases as bioelectrocatalysts are clean, sustainable, and environmentally friendly power devices. Abstract : H2 /O2 biofuel cells utilizing hydrogenases and multicopper oxidases as bioelectrocatalysts are clean, sustainable, and environmentally friendly power devices. In this study, we constructed a novel gas diffusion bioelectrode with a sheet of waterproof carbon cloth as the electrode base and optimized the hydrophilicity/hydrophobicity of the electrode for both high gas permeability and high direct electron transfer bioelectrocatalytic activity. The electrode exhibited a large current density of about 10 mA cm −2 in the steady-state for both H2 oxidation and O2 reduction. The biocathode and the bioanode were coupled to construct a gas diffusion H2 /O2 biofuel cell. The dual gas diffusion system allowed the separate supply of gaseous substrates (H2 and O2 ) to the bioanode and biocathode, with consequent suppression of the oxidative inhibition of the hydrogenases. The cell exhibited a maximum power density of 8.4 mW cm −2 at a cell voltage of 0.7 V under quiescent conditions.