Structure-dependent photocatalytic decomposition of formic acid on the anatase TiO2(101) surface and strategies to increase its reaction rate

The photocatalytic decomposition of aqueous acetic acid into molecular hydrogen, carbon dioxide, and hydrocarbons employing platinized titania (Pt/TiO2) as a photocatalyst has been studied.

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Hybrid Density Functional Calculations of Formic Acid on Anatase TiO2(101) Surfaces

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.7b06957 ◽

2017 ◽

Vol 121 (32) ◽

pp. 17417-17420 ◽

Cited By ~ 5

Author(s):

L. Kou ◽

Th. Frauenheim ◽

A. L. Rosa ◽

E. N. Lima

Keyword(s):

Formic Acid ◽

Density Functional Calculations ◽

Density Functional ◽

Anatase Tio2 ◽

Hybrid Density Functional

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ACTION OF HIGH SPEED ELECTRONS ON METHANE, OXYGEN AND CARBON MONOXIDE

Canadian Journal of Research ◽

10.1139/cjr30-059 ◽

1930 ◽

Vol 3 (3) ◽

pp. 241-251 ◽

Cited By ~ 5

Author(s):

J. C. McLennan F.R.S. ◽

J. V. S. Glass B.A.

Keyword(s):

Carbon Dioxide ◽

Carbon Monoxide ◽

Water Vapor ◽

Formic Acid ◽

Total Pressure ◽

High Speed ◽

Reaction Rate ◽

First Order ◽

Gaseous Products ◽

Retarding Effect

This paper deals with the action of cathode rays on gases and gas mixtures. Methane, methane-oxygen mixtures, carbon monoxide and carbon monoxide-oxygen mixtures were examined. Methane gave small percentages of hydrogen and ethane. Methane and oxygen mixtures gave as gaseous products, carbon monoxide, carbon dioxide and hydrogen, the only other products being water and formic acid. The relative proportions of the products do not vary widely under a wide variation of conditions.The reaction was found to be of the first order with respect to pressure. The reaction rate increases linearly with the voltage up to a certain value, after which it becomes nearly independent of the voltage.The action of cathode rays on carbon monoxide produces carbon dioxide and a solid brown suboxide which is extremely soluble in water, and its composition corresponds to a formula (C3O)n. If the carbon monoxide is moist, no visible amount of solid or liquid is found and there is less carbon dioxide.Carbon monoxide-oxygen mixtures under the action of cathode rays form carbon dioxide. Presence of water vapor has a retarding effect on the reaction. For mixtures of the same composition the reaction rate is proportional to the total pressure. For dry mixtures the product increases with the carbon monoxide present; when moist it is much less, and independent of the carbon monoxide.

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Density Functional Theory Study of Formic Acid Adsorption on Anatase TiO2(001): Geometries, Energetics, and Effects of Coverage, Hydration, and Reconstruction

The Journal of Physical Chemistry B ◽

10.1021/jp056572t ◽

2006 ◽

Vol 110 (6) ◽

pp. 2804-2811 ◽

Cited By ~ 181

Author(s):

Xue-Qing Gong ◽

Annabella Selloni ◽

Andrea Vittadini

Keyword(s):

Density Functional Theory ◽

Formic Acid ◽

Density Functional ◽

Anatase Tio2 ◽

Density Functional Theory Study ◽

Functional Theory

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Formic Acid Photoreforming for Hydrogen Production on Shape-Controlled Anatase TiO2 Nanoparticles: Assessment of the Role of Fluorides, {101}/{001} Surfaces Ratio, and Platinization

ACS Catalysis ◽

10.1021/acscatal.9b01861 ◽

2019 ◽

Vol 9 (8) ◽

pp. 6692-6697 ◽

Cited By ~ 21

Author(s):

Francesco Pellegrino ◽

Fabrizio Sordello ◽

Lorenzo Mino ◽

Claudio Minero ◽

Vasile-Dan Hodoroaba ◽

...

Keyword(s):

Hydrogen Production ◽

Formic Acid ◽

Tio2 Nanoparticles ◽

Anatase Tio2 ◽

Shape Controlled

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Base-catalysed reduction of pyruvic acid in near-critical water

Chemical Papers ◽

10.2478/s11696-013-0308-x ◽

2013 ◽

Vol 67 (5) ◽

Author(s):

Li Luo ◽

Zhi Hou ◽

Yuan Wang ◽

Li Dai

Keyword(s):

Activation Energy ◽

Formic Acid ◽

Pyruvic Acid ◽

Sodium Acetate ◽

Reaction Rate ◽

Arrhenius Equation ◽

Base Catalyst ◽

Acid Yield ◽

Exponential Factor ◽

Reaction Rate Constants

AbstractThe reduction of pyruvic acid in near-critical water has successfully been conducted under conditions of various temperatures, pressures, reaction time and the presence of formic acid as the reducing agent. In this work, additives (K2CO3, KHCO3, and sodium acetate) used in the reduction of pyruvic acid were also investigated. The results showed that by adding K2CO3 (25 mole %) a markedly higher lactic acid yield (70.7 %) was obtained than without additives (31.3 %) at 573.15 K, pressure of 8.59 MPa, 60 min, and in the presence of 2 mol L−1 formic acid. As a base catalyst, K2CO3 definitely accelerated the reduction of pyruvic acid. The reaction rate constants, average apparent activation energy and pre-exponential factor were evaluated in accordance with the Arrhenius equation. The reaction mechanism of the reduction was proposed on the basis of the experimental results.

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