Chemical Bias Coupled Photoelectrochemical Zero Bias Hydrogen Generation Utilizing Self-Assembled TiO 2 Nanoarchitecture
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Erratum Chemical Bias Coupled Photoelectrochemical Zero Bias Hydrogen Generation Utilizing Self-Assembled TiO2 Nanoarchitecture Electrode – ERRATUM Masataka Sato, Yoichi Kamo, and Kenji Sakamaki doi: 10.1557/opl.2013.1149, Published by Materials Research Society, 26 November 2013. The article by Sato et al. was published with the incorrect volume number. The correct volume number is Volume 1601. The Materials Research Society and Cambridge University Press apologize to the authors for this error. The correct version of the article follows this notice.
Reference Masataka Sato, Yoichi Kamo and Kenji Sakamaki (2013). Chemical Bias Coupled Photoelectrochemical Zero Bias Hydrogen Generation Utilizing Self-Assembled TiO2 Nanoarchitecture Electrode. MRS Online Proceedings Library, 1601, jsapmrs13-1601-6544 doi:10.1557/opl.2013.1149.
Mater. Res. Soc. Symp. Proc. Vol. 1601 © 2013 Materials Research Society DOI: 10.1557/opl.2013 .1149
Chemical Bias Coupled Photoelectrochemical Zero Bias Hydrogen Generation Utilizing Self-Assembled TiO2 Nanoarchitecture Electrode Masataka Sato, Yoichi Kamo and Kenji Sakamaki Department of Chemistry, Fukushima National College of Technology (FNCT), Iwaki, Fukushima 970-8034, Japan ABSTRACT Photoelectrochemical zero bias hydrogen generation has been achieved with self-assembled nanoporous anatase type TiO2 (SANAT) photoelectrode and chemical bias. The SANAT fabricated using halogen free conventional electrolytes by anodization exhibits more than 2 times superior performance to rutile single crystal electrodes in photoelectrolysis of water. The chemical bias assisted cell consists of two separate compartments connected by a liquid junction. The SANAT anode is immersed in alkaline electrolyte, Pt cathode is in acidic electrolyte. The use of electrolytes of two different pH values produces a chemical bias of 0.059 ∆pH V due to the proton concentration gradient. Under zero bias condition, photocurrent sufficient for photolysis of water was observed. Hydrogen evolution was visible at counter electrode without the application of any external voltage. We call this system fuel type photoelectrochemical zero bias hydrogen generation or water splitting. INTRODUCTION The first successful electrochemical photolysis of water was reported in 1972, which is a milestone in the history of advanced hydrogen generation [1]. After the discovery, a chemical potential difference between two electrodes, chemical bias, has been imposed as electromotive force (EMF) [2-7]. The use of solar energy to generate hydrogen energy adapted in the time provides the greatest opportunity to end the world’s dependence of fossil fuels, help curb global climate change, and create environmentally friendly society. By mimicking the mechanism of photosynthetic reaction center II followed by an electron transport chain creating a proton gradient for the synthesis of energy-carrying molecule ATP, in the present study, self-assembled nanoarchitecture electrode [8,9] and chemical bias have been utilized to achieve effective photoinduced
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