Takashi Suzuki

Bio: Takashi Suzuki is an academic researcher from Kobe University. The author has contributed to research in topics: Molybdenum bronze & Standard enthalpy of formation. The author has an hindex of 4, co-authored 9 publications receiving 53 citations. Previous affiliations of Takashi Suzuki include Kindai University.

Change in bulk and surface structure of mixed MoO3-ZnO oxide by heat treatment in air and in hydrogen

Abstract: The mixed MoO3-ZnO oxides with various mole fraction of Mo, X Mo, obtained by the impregnation method were heated in air and in hydrogen. As for the mixed oxide heated in air, MoO3 reactedstoichiometrically with ZnO to give ZnMoO4 at X Mo < 0.5, while at X Mo > 0.5, the reaction did not proceed completely. On the other hand, for the mixed oxide heated in hydrogen, at X Mo < 0.5 ZnMoO4 was reduced to ZnMoO3 with the anion vacancy, while at X Mo > 0.5, MoO3 was reduced to MoO2 and ZnMoO4 was difficult to be reduced to ZnMoO3. The structure of the surface and/or near the surface was different from the bulk structure.

Calorimetric study of alkali-metal decamolybdates

Abstract: The enthalpies of formation of the alkali-metal decamolybdates (A 2 O) x/2 ·10MoO 3 ·nH 2 O (A=Li, Na, K, Rb, and Cs) have been determined by solution calorimetry; relations between the thermodynamic quantities obtained, chemical composition and crystal structures are discussed.

Review of proton conductors for hydrogen separation

Abstract: There is a global push to develop a range of hydrogen technologies for timely adoption of the hydrogen economy. This is critical in view of the depleting oil reserves and looming transport fuel shortage, global warming, and increasing pollution. Molecular hydrogen (H2) can be generated by a number of renewable and fossil-fuel-based resources. However, given the high cost of H2 generation by renewable energy at this stage, fossil or carbon fuels are likely to meet the short- to medium-term demand for hydrogen. In view of this, effective technologies are required for the separation of H2 from a gas feed (by-products of coal or bio-mass gasification plants, or gases from fossil fuel partial oxidation or reforming) consisting mainly of H2 and CO2 with small quantities of other gases such as CH4, CO, H2O, and traces of sulphur compounds. Several technologies are under development for hydrogen separation. One such technology is based on ion transport membranes, which conduct protons or both protons and electrons. Although these materials have been considered for other applications, such as gas sensors, fuel cells and water electrolysis, the interest in their use as gas separation membranes has developed only recently. In this paper, various classes of proton-conducting materials have been reviewed with specific emphasis on their potential use as H2 separation membranes in the industrial processes of coal gasification, natural gas reforming, methanol reforming and the water–gas shift (WGS) reaction. Key material requirements for their use in these applications have been discussed.