Application of microwave to the synthesis of nanosized metal and alloy catalysts on titanium dioxide supports
Application of microwave to the synthesis of nanosized metal and alloy catalysts on titanium dioxide supports
复制标题
DOI：
10.1088/1742-6596/165/1/012039
复制
发表时间：
2009-05
期刊：
影响因子：
--
通讯作者：
S. Shironita;T. Takasaki;T. Kamegawa;K. Mori;H. Yamashita
中科院分区：
文献类型：
--
作者：
S. Shironita;T. Takasaki;T. Kamegawa;K. Mori;H. Yamashita
采用一种简单而独特的微波辅助方法，在不同的二氧化钛（TiO2、锐钛矿+金红石、锐钛矿和金红石）上沉积纳米级Pd和PdAux合金颗粒。采用x射线衍射（XRD）、N2吸附-解吸和x射线吸收精细结构（XAFS）等方法对所得样品进行了结构表征。XAFS结果表明，在TiO2载体上形成了PdAux合金颗粒。通过在室温下由氢气和氧气直接合成过氧化氢（H2O2）的反应来评估催化活性。与传统钯催化剂相比，这些钯合金催化剂具有较高的反应速率。
Nanosized Pd and PdAux alloy particles were deposited on various titanium dioxides (TiO2; anatase + rutile, anatase, and rutile) using a simple and unique microwave-assisted method. The structure of the obtained samples was characterized by X-ray diffraction (XRD), N2 adsorption-desorption and X-ray absorption fine structure (XAFS) methods. Results of XAFS indicated that PdAux alloy particles had formed on TiO2 supports. Catalytic activity was estimated by a direct synthesis reaction of hydrogen peroxide (H2O2) from hydrogen and oxygen gases at room temperature. A high reaction rate could be obtained using these PdAux alloy catalysts compared with conventional Pd catalysts.