Factors affecting catalytic destruction of H2O2 by hydrogenation and decomposition over Pd catalysts supported on activated carbon cloth (ACC)
Factors affecting catalytic destruction of H2O2 by hydrogenation and decomposition over Pd catalysts supported on activated carbon cloth (ACC)
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DOI：
10.1016/j.cattod.2013.12.050
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发表时间：
2015-06
期刊：
影响因子：
5.3
通讯作者：
D. Gudarzi;W. Ratchananusorn;I. Turunen;M. Heinonen;T. Salmi
中科院分区：
文献类型：
--
作者：
D. Gudarzi;W. Ratchananusorn;I. Turunen;M. Heinonen;T. Salmi
已经研究了通过活性炭布负载的钯催化剂分解和氢化来破坏过氧化氢。以二氯化钯(PdCl2)酸性溶液为金属前驱体，采用浸渍法制备催化剂。反应在帕尔不锈钢高压釜中分批进行。测试在室温下进行，使用甲醇或水作为反应介质。考察了不同酸（硝酸和乙酸）对载体的氧化预处理、催化剂在不同气氛（氢气和空气）中的热处理以及Pd含量对催化剂最终性能和H2O2破坏活性的影响。结果表明，含氧表面官能团对催化剂的理化性质和H2O2破坏活性具有重要作用。事实上，这些基团的存在可以稳定溶液中的 H2O2，并减少其分解和氢化。此外，与相应的零价 (Pd0) 催化剂相比，催化剂中氧化态 Pd (PdO) 的存在使其在 H2O2 分解中的活性较低。使用水代替甲醇会显着增加 H2O2 的分解。
Destruction of hydrogen peroxide by its decomposition and hydrogenation over Pd catalysts supported on activated carbon cloth has been investigated. The catalysts were prepared by the impregnation method using acidic solution of palladium dichloride (PdCl2) as a metal precursor. The reactions were performed batchwise in a Parr stainless steel autoclave. Tests were run at room temperature using either methanol or water as a reaction medium. The effects of oxidation pre-treatment of the support with different acids (nitric and acetic acid), the heat treatment of the catalysts in different atmospheres (H2and air), and Pd content on the final properties and H2O2destruction activity of the catalysts were investigated. The results indicated that oxygen-containing surface functional groups have an important role in determining the physicochemical properties and H2O2destruction activity of the catalysts. In fact, the presence of these groups stabilizes H2O2in the solution and reduces its decomposition and hydrogenation. Furthermore, the presence of the oxidized state of Pd (PdO) in the catalyst makes it less active in H2O2decomposition when compared to the corresponding zero valences (Pd0) catalyst. Using water instead of methanol dramatically increased the H2O2decomposition.