![]() Promotion of the HCHO oxidation over gold supported on Co-promoted ceria catalysts can be related to the higher concentration of oxygen vacancies and an improvement in the redox properties, which can contribute to the better activation of O 2 and an enhancement of the oxygen mobility. Furthermore, no marked changes were found in gold dispersion upon adding cobalt. X-ray photoelectron spectroscopy (XPS) characterization of the fresh catalysts indicated that the Au species were mainly in a slightly ionic δ + valence state, but did not exclude the possibility of metallic gold. Based on the HCHO amount (in μmol) converted into CO 2 per gram of gold per second after 40 h on stream, the 1.5Au/CeCo catalyst demonstrated the best activity (∼3.9) as compared to the other catalysts (≤2.0). Universitatea Tehnica Gheorghe Asachi din Iasi, Chemistry, FRANCE. Catalytic total oxidation is an efficient. The 3 wt% Au catalysts demonstrated a higher HCHO conversion than their low-gold counterparts (1.5 wt% Au), a remarkable improvement in the HCHO conversion was observed using Co-promoted ceria (9 mol%). Guillaume Rochard, Lilian Olivet, Mariebelle Tannous, Christophe Poupin, Stphane Siffert, Renaud Cousin. Hierarchical porous -MnO2 from perovskite precursor: Application to the formaldehyde total oxidation. All of the supported Au catalysts exhibited HCHO oxidation into CO 2 at 25 ☌ and demonstrated a great stability for the time on stream (40 h). Yin Xu, Jrmy Dhainaut, Guillaume Rochard, Jean-Philippe Dacquin, Anne-Sophie Mamede, Jean-Marc Giraudon, Jean-Franois Lamonier, Hui Zhang, Sbastien Royer. The fresh supported Au catalysts were characterized using several techniques in order to investigate their morphological, structural and redox properties before being tested for formaldehyde (HCHO) total oxidation. Wrote the paper: TR GL HD GD ER PL.Au catalysts with loadings of 1.5 and 3 wt% were dispersed over CeO 2 and Co (9 12 mol%) promoted CeO 2, using the deposition–precipitation method, followed by calcination at 350 ☌. Performed the experiments: TR GL HD ND TF. Rosalie du Verdier de La Sorinière (en religion sur Rosalie-Céleste), née le 12 août 1745 au château de la Sorinière près Chemillé, en province dAnjou et morte guillotinée à Angers le 27 janvier 1794, est une religieuse bénédictine de Notre-Dame du Calvaire, martyre, et une bienheureuse. Parcours Parcours scolaire Collège - Les aubiers 1985 - 1989 A propos Général Prénom. Boyjoo, Yash Rochard, Guillaume Giraudon, Jean-Marc Liu, Jian et al. Pour le contacter, connectez-vous ou inscrivez-vous gratuitement. MnO2 hollow spheres for enhanced catalytic oxidation of formaldehyde 2018. ![]() The authors have declared that no competing interests exist.Ĭonceived and designed the experiments: TR GL PL. Guillaume ROCHARD est sur Copains davant. Irstea, LISC, Complex Systems Engineering Laboratory, 9 avenue Blaise Pascal–CS 20085, 63178, Aubière, France The use of dynamic approaches to assess how these species will. Within the context of ongoing environmental changes, the life history of diadromous fish represents a real potential for exploring and colonizing new environments due to high potential dispersal abilities. Irstea, EABX, Aquatic Ecosystems and Global Changes research unit, 50 avenue de Verdun, Gazinet Cestas, F-33612, Cestas, France Deffuant, Guillaume Rochard, Eric Lambert, Patrick Registered: Abstract. ![]() * E-mail: EABX, Aquatic Ecosystems and Global Changes research unit, 50 avenue de Verdun, Gazinet Cestas, F-33612, Cestas, France
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