Catalysts for direct H2O2 synthesis taking advantage of the high H2 activating ability of Pt: kinetic characteristics of Pt catalysts and new additives for improving H2O2 selectivity
作者： T. Deguchi , H. Yamano , S. Takenouchi , M. Iwamoto
DOI: 10.1039/C5CY01937K
关键词:
摘要: To develop efficient catalysts for the direct H2O2 synthesis from H2 and O2 by taking advantage of high activating ability Pt, kinetic studies H2–O2 reaction were performed using a Pt-PVP (polyvinylpyrrolidone) colloid Pt supported on carbon (Pt/C) as catalysts, new additives explored. Only 10−9 N protons was sufficient to maintain rate, suggesting that dissociatively adsorbed very active. The addition H+ Br−, which is most effective Pd exerted much less influence resulting in low selectivities. Inorganic organic iodides well some sulfur compounds increased yield. analysis indicated formation selectivity Pt/C maximized combination with p-iodophenol, nearly comparable Pd/C combined NaBr; catalytic activity higher. However, higher destruction compared catalyst spoiled total performance formation. Sulfur (Na2S2O3) phosphine (tris(hydroxymethyl)phosphine) unselectively depressed reaction.
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