介孔 Pd@Ru 核壳纳米棒用于碱性溶液中的析氢反应。
Mesoporous Pd@Ru Core-Shell Nanorods for Hydrogen Evolution Reaction in Alkaline Solution.
机构信息
National Synchrotron Radiation Laboratory (NSRL) , University of Science and Technology of China , Hefei , Anhui 230029 , China.
State Key Lab of Organic-Inorganic Composites , Beijing University of Chemical Technology , Beijing 100029 , China.
出版信息
ACS Appl Mater Interfaces. 2018 Oct 10;10(40):34147-34152. doi: 10.1021/acsami.8b09988. Epub 2018 Sep 26.
The activity and stability of bimetallic nanocatalysts strongly depend on their structures, compositions, and interfaces. Here, we report the synthesis of mesoporous Pd@Ru core-shell bimetallic nanorods composed of face-centered cubic Pd and hexagonal close-packed Ru. The nanorods have two types of cavities with diameters of 3.0 ± 0.9 and 20.3 ± 8.1 nm. The mutual diffusion process between Ru and Pd is characterized by the high-angle annular dark-field scanning transmission electron microscopy, energy-dispersive X-ray spectroscopy mapping, and the synchrotron radiation photoemission spectroscopy measurements. The mesoporous Pd@Ru nanorods exhibit superior catalytic performance and stability for hydrogen evolution reactions (overpotentials of 30 mV at 10 mA·cm in 1.0 M KOH solution and 37 mV at 10 mA·cm in 0.5 M HSO solution).
双金属纳米催化剂的活性和稳定性强烈依赖于其结构、组成和界面。在这里，我们报告了由面心立方 Pd 和六方密排 Ru 组成的具有核壳结构的介孔 Pd@Ru 纳米棒的合成。纳米棒具有两种直径分别为 3.0 ± 0.9nm 和 20.3 ± 8.1nm 的空腔。Ru 和 Pd 之间的互扩散过程通过高角度环形暗场扫描透射电子显微镜、能量色散 X 射线能谱映射和同步辐射光电子能谱测量进行了表征。介孔 Pd@Ru 纳米棒在氢气析出反应中表现出优异的催化性能和稳定性（在 1.0 M KOH 溶液中 10 mA·cm 的过电位为 30 mV，在 0.5 M HSO 溶液中 10 mA·cm 的过电位为 37 mV）。
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