Iwao Yasumori
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View article: Xanthine Sensor Based on Xanthine Oxidase Immobilized in Poly (p-Benzoquinone) Film
Xanthine Sensor Based on Xanthine Oxidase Immobilized in Poly (p-Benzoquinone) Film Open
The redox centers of most oxi-
View article: Electrochemical Studies of Poly(mercaptohydroquinone) and Poly(mercapto-<i>p</i>-benzoquinone) Films Prepared by Electropolymerization. III. Basic Behavior and Properties in Aqueous Solutions
Electrochemical Studies of Poly(mercaptohydroquinone) and Poly(mercapto-<i>p</i>-benzoquinone) Films Prepared by Electropolymerization. III. Basic Behavior and Properties in Aqueous Solutions Open
Electrochemical behavior and properties of poly(mercaptohydroquinone)/poly(mercapto-p-benzoquinone)(SQ) films prepared on glassy carbon electrodes (GCE) by anodic polymerization of mercaptohydroquinone were examined in detail by cyclic vol…
View article: Catalysis by Transition Metal Carbides. VI. Hydrogenation of Carbon Monoxide over WC, W2C, and W Powder Catalysts
Catalysis by Transition Metal Carbides. VI. Hydrogenation of Carbon Monoxide over WC, W2C, and W Powder Catalysts Open
WC, W2C, and W were comparatively studied for CO hydrogenation to reveal the catalytic role of carbon alloyed with metals. The main products of the reaction were CH4, CO2, and H2O on these catalysts, but the kinetic data obtained for WC ca…
View article: Catalytic Activity of Highly Dispersed Palladium. III. The Effect of Added Zirconium Oxide upon Palladium Metal Surface Revealed by a Combined Infrared Spectroscopic and Thermal Desorption Study of Carbon Monoxide Adsorption
Catalytic Activity of Highly Dispersed Palladium. III. The Effect of Added Zirconium Oxide upon Palladium Metal Surface Revealed by a Combined Infrared Spectroscopic and Thermal Desorption Study of Carbon Monoxide Adsorption Open
A combined infrared spectroscopic (IR) and thermal desorption (TD) study of CO adsorption was carried out to reveal the nature of Pd surface which is modified by the addition of ZrO2. The TD spectra of CO from SiO2- or α-Al2O3-supported Pd…
View article: The electrochemical redox reaction with the quinonoid polymer modified electrode.
The electrochemical redox reaction with the quinonoid polymer modified electrode. Open
The behaviors of the electrochemical redox reaction of various substances were investigated with the quinonoid polymer modified electrode (SQE). The voltammograms of hydroquinones and quinones at SQE were similar to those at a glassy carbo…
View article: Catalysis by “Copper Chromite”. I. The Effect of Hydrogen Reduction on the Composition, Structure, and Catalytic Activity for Methanol Decomposition
Catalysis by “Copper Chromite”. I. The Effect of Hydrogen Reduction on the Composition, Structure, and Catalytic Activity for Methanol Decomposition Open
The effect of hydrogen reduction on the composition, structure, and catalytic activity of dichromium(III) copper(II) tetraoxide (copper chromite), CuCr2O4, was investigated. In this oxide, the surface and the bulk CuII was reduced into CuI…
View article: Active State of the LaCoO3 Catalyst. A Reply to the Comment, “Hydrogenolysis and Hydrogenation of Ethylene on LaCoO3”
Active State of the LaCoO3 Catalyst. A Reply to the Comment, “Hydrogenolysis and Hydrogenation of Ethylene on LaCoO3” Open
View article: Catalytic Activity of Highly Dispersed Palladium. II. X-Ray Photoelectron Spectroscopic and Thermal Desorption Studies of the Effects of ZrO2 Added to α-Alumina-supported Palladium
Catalytic Activity of Highly Dispersed Palladium. II. X-Ray Photoelectron Spectroscopic and Thermal Desorption Studies of the Effects of ZrO2 Added to α-Alumina-supported Palladium Open
The effects of ZrO2 upon the catalytic properties of α-alumina-supported palladium for the hydrogenation of gaseous cyclohexene were studied by means of detailed kinetic analysis, thermal desorption (TD), and X-ray photoelectron spectrosco…
View article: Catalysis by Mixed Oxide Perovskites. II. The Hydrogenolysis of C3–C5 Hydrocarbons on LaCoO3
Catalysis by Mixed Oxide Perovskites. II. The Hydrogenolysis of C3–C5 Hydrocarbons on LaCoO3 Open
The catalytic hydrogenolysis of C3–C5 alkanes on LaCoO3 perovskite oxide was found to show a highly selective formation of methane in the temperature range of 350–620 K. The reaction order with respect to the hydrocarbon pressure was unity…
View article: Catalysis by Alkaline Earth Metal Oxides. III. X-Ray Photoelectron Spectroscopic Study of Catalytically Active MgO, CaO, and BaO Surfaces
Catalysis by Alkaline Earth Metal Oxides. III. X-Ray Photoelectron Spectroscopic Study of Catalytically Active MgO, CaO, and BaO Surfaces Open
X-Ray photoelectron spectroscopy was used to reveal the surface states of MgO, CaO, and BaO oxides, which are catalytically active for ethylene hydrogenation. The catalytic activity of CaO exposed to H2O changed with an increase in the tem…
View article: Catalysis by Alkaline Earth Metal Oxides. I. The Mechanism of Ethylene Hydrogenation on Calcium Oxide
Catalysis by Alkaline Earth Metal Oxides. I. The Mechanism of Ethylene Hydrogenation on Calcium Oxide Open
The mechanism of ethylene hydrogenation on a thermally activated CaO was studied in the overall temperature range of 197–623 K. The maximum in the reaction rate was observed around 320 K, while the activation energy was found to vary with …
View article: Hydrogen-Deuterium Equilibration Reaction over Platinum Supported on Polyamide-6
Hydrogen-Deuterium Equilibration Reaction over Platinum Supported on Polyamide-6 Open
Catalysis by platinum supported on polyamide-6 was examined for the H2-D2 equilibration reaction at 0 °C in the pressure range of 5–20 Torr (1 Torr=133.3 Pa). Three kinds of polyamides with different molecular weights were prepared as supp…
View article: ESR Studies of Oxygen, Sulfur Oxide, and Sulfur Radicals Adsorbed on NaX Zeolite
ESR Studies of Oxygen, Sulfur Oxide, and Sulfur Radicals Adsorbed on NaX Zeolite Open
The states of O2 and SO2 adsorbed on NaX zeolite were investigated by means of ESR. No oxygen anion radicals were formed thermally on NaX up to 773 K. The adsorption of O2 on γ-irradiated NaX in a vacuum, however, resulted in an ESR spectr…
View article: Mechanism of enantioface differentiating hydrogenation on modified nickel surfaces
Mechanism of enantioface differentiating hydrogenation on modified nickel surfaces Open
View article: The Mechanism of the Selective Hydrogenation of 1,3-Butadiene on Copper Surfaces
The Mechanism of the Selective Hydrogenation of 1,3-Butadiene on Copper Surfaces Open
The hydrogenation of 1,3-butadiene on copper surfaces was studied in detail. A highly selective formation of 1-butene was observed in the range of temperatures from 27 to 76 °C; the initial rate of the formation was well expressed in terms…
View article: The Kinetics and Mechanism of Hydrogen Adsorption and Hydrogen–Deuterium Equilibration on the Copper Surface
The Kinetics and Mechanism of Hydrogen Adsorption and Hydrogen–Deuterium Equilibration on the Copper Surface Open
The mechanism of H2–D2 equilibration reaction over the copper surface was studied in the 40–90 °C range of temperature and in the pressure range of 4–45 Torr. From the studies of the hydrogen adsorption and the reaction between gaseous deu…
View article: Decomposition of Methanol on Nickel and Copper Surfaces
Decomposition of Methanol on Nickel and Copper Surfaces Open
d-金属およびs-金属の代表とみられるニッケルおよび銅の表面で進行するメタノールの分解反応について,その反応機構および両金属の触媒作用の相違を明らかにするために総合的研究を行なった。 メタノールおよびその関連化合物であるメタノール-d1(CH3OD),ホルムアルデヒドおよびギ酸メチルの分解反応の動力学的研究の結果を,重水素との水素交換反応およびメタノールの吸着特性とあわせて考察した。 またメタノールおよびその分解生成物の吸着状態を赤外吸収および昇温脱離スぺクトルによって調べ…
View article: 金属表面と触媒活性
金属表面と触媒活性 Open
Nr！ざ 余1暮 》 届 2 剥 漿 0 一1．Q 一2D 一3Ω 一40 w Ni(110) ㍉ oTO Rh Pd 陽 Ni(rdnd㎝融 e Cr o 一5．Q
View article: The Surface Area of the Annealed Palladium Foil Catalyst as Determined by a Novel Method of Measuring a Small Surface Area
The Surface Area of the Annealed Palladium Foil Catalyst as Determined by a Novel Method of Measuring a Small Surface Area Open
In order to measure the small surface area of metal foils down to a few ten square centimeters by making use of gas adsorption, an apparatus was developed, which made it possible to estimate the amount of adsorbed xenon at 77.5°K from the …
View article: Catalytic Decomposition of Methanol over Nickel Wire
Catalytic Decomposition of Methanol over Nickel Wire Open
The kinetic studies of the decomposition of methanol have been undertaken under pressures of up to 20 mmHg and at temperatures between 300 and 430°C. The initial rate (r0) of decomposition which turns methanol into carbon monoxide and hydr…
View article: Selective Hydrogenation of Acethylene. I. Kinetics and Mechanism of the Reaction on a-Alumina Supported Palladium Catalyst
Selective Hydrogenation of Acethylene. I. Kinetics and Mechanism of the Reaction on a-Alumina Supported Palladium Catalyst Open
アセチレンの接触水素化反応にあらわれる触媒作用の選択性の原因を明らかにする目的で,α-アルミナ付パラジウム触媒により,温度範囲30°～200℃,全圧25～100mmHg,反応気体組成として水素:アセチレン比1:2～2:1の条件のもとに反応速度式,生成エチレン/エタン比としての選択率,およびそれらの温度変化を求めた。反応初期における速度式は低温では水素圧に1次,アセチレン圧に0次であるが,150℃以上ではアセチレン圧の1次に変化する。また120℃以下での初期のエチレン,エタン…
View article: Sorption of Hydrogen by Nickel Wire Catalyst
Sorption of Hydrogen by Nickel Wire Catalyst Open
ニッケル線触媒に対する水素の収着を,温度45°～385℃,圧力1×10-3～15mmHgの範囲で測定した。水素の等温収着量は,つぎの等温式,n-kaKa1/2/(1+KaP1/2)+kbKbP1/2(P:水素圧,k,K:定数)でよく表わされることから,収着に際して,表面におけるLangmuir型の解離吸着および固体内部への解離吸収が,同時に行なわれることがわかった。収着の温度変化から求めた吸収熱および吸収状態のエントロピーは,-5.1kcal/molおよび29e.u./9-…
View article: Absorption Isotherm for Sintered Palladium Black-Hydrogen System
Absorption Isotherm for Sintered Palladium Black-Hydrogen System Open
View article: A New Differential Capacitance Manometer
A New Differential Capacitance Manometer Open
従来の電気容量示差圧力計にみられる工作上の困難や金属部分の活性気体による腐食あるいは触媒作用などの欠点をさけるため,新方式のガラス製圧力計を試作した。そのおもな部分は先端に微少な電極をつけたプルドン管と,気密のまま位置を調節しうる対向電極からできている。容量変化の検出に「井上回路」をもちいて0.1μμFの容量変化を0.1～1mAの電流変化に変換することができる。試作した圧力計の特性はつぎのとおりである。測定圧力差の範囲;0.3mHg,比例範囲;0.1mmHg,検出可能の圧力…
View article: Modified Bond Eigenfunction Method of Constructing Potential Energy Surface of Reaction. I. Theory and General Remarks
Modified Bond Eigenfunction Method of Constructing Potential Energy Surface of Reaction. I. Theory and General Remarks Open
View article: Quantum-Mechanical Considerations of Chemical Reaction Rates. II. The Transmission through Curved Reaction Path
Quantum-Mechanical Considerations of Chemical Reaction Rates. II. The Transmission through Curved Reaction Path Open
View article: A Quantum-Mechanical Consideration of Chemical Reaction Rates
A Quantum-Mechanical Consideration of Chemical Reaction Rates Open
The transmission coefficient for the simplified two-dimensional potential barrier has been obtained and its property depending on the curvatures of the barrier and other factors has been discussed. On the basis of this coefficient a quantu…
View article: Erratum: A Quantum-Mechanical Equation of Reaction Rates
Erratum: A Quantum-Mechanical Equation of Reaction Rates Open
First Page
View article: On the Binding Energy of LiH
On the Binding Energy of LiH Open
View article: Treatement of Atomic Adsorption by use of Linear Atomic Chain Model
Treatement of Atomic Adsorption by use of Linear Atomic Chain Model Open