Preparation of Nano-Composited Catalyst from the Bulk Intermetallic Compound AuZr3 with Hydrogen Absorption
Preparation of Nano-Composited Catalyst from the Bulk Intermetallic Compound AuZr3 with Hydrogen Absorption
复制标题
吸氢体金属间化合物AuZr3制备纳米复合催化剂
DOI：
10.1007/s10562-010-0397-x
复制
发表时间：
2010
影响因子：
2.8
通讯作者：
C. Nishimura
中科院分区：
文献类型：
--
作者：
Naruki Endo;S. Kameoka;A. Tsai;T. Hirata;C. Nishimura
本文研究了金属间化合物AuZr_3和氢化物AuZr_3 H_x（x= 4.8）对CO氧化反应（CO + 1/2 O_2 → CO_2）的催化活性。两种样品的催化活性均来源于煅烧后氧化生成的纳米金颗粒和纳米晶ZrO 2。AuZr 3 Hx的氧化发生在比AuZr 3更低的温度下，导致在ZrO 2上形成分布更均匀且尺寸更小的纳米金颗粒（~5 nm），这是相对较高催化性能的原因。本研究提供了一种可能的氢吸附处理是一个有益的过程，以获得纳米复合材料的金属间化合物的催化剂。图形摘要氢吸附AuZr 3 Hx（x= 4.8）发生氧化的温度远低于 AuZr 3。煅烧后的AuZr 3 Hx在ZrO 2表面均匀分布着粒径较小（约5 nm）的纳米金颗粒，这是其具有较高CO氧化性能的原因。
AbstractCalcination-induced catalytic activity of CO oxidation reaction (CO + 1/2O2→ CO2) for an intermetallic, AuZr3and a hydride, AuZr3Hx(x= 4.8) has been studied. The catalytic activities for both samples were originated from the formation of nano-gold particles and nano-crystalline ZrO2, result by oxidation upon calcination. Oxidation of the AuZr3Hxoccurred at lower temperature than the AuZr3, gave rise to the formation of more homogenous distribution and smaller sizes of nano-gold particles (~5 nm) on ZrO2, which were responsible for relatively high catalytic performance. This study provides the possibility of hydrogen absorption treatment being a beneficial process for obtaining nano-composite from intermetallic compounds for catalysts.Graphical AbstractOxidation of the hydrogen absorbed AuZr3Hx(x= 4.8) occurred at much lower temperature than that of the AuZr3. The calcined AuZr3Hxexhibited more homogenous distribution of nano-gold particles with smaller sizes (~5 nm) on the ZrO2, which were responsible for relatively high performance of CO oxidation.
Au-Zr二元系金属间化合物的吸氢性能
DOI：
--
发表时间：
2009
期刊：
Journal of Alloys and Compounds 485
影响因子：
--
作者：
N.Endo;S.Kameoka;A.P.Tsai;L.Zou;T.Hirata;C.Nishimura
通讯作者：
C.Nishimura