Mesoporous Pd@Ru Core-Shell Nanorods for Hydrogen Evolution Reaction in Alkaline Solution.
Yiqi LuoXuan LuoGeng WuZhijun LiGuanzhong WangBin JiangYanmin HuTingting ChaoHuanxin JuJun-Fa ZhuZhongbin ZhuangYuen WuXun HongYadong LiPublished in: ACS applied materials & interfaces (2018)
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-2 in 1.0 M KOH solution and 37 mV at 10 mA·cm-2 in 0.5 M H2SO4 solution).
Keyphrases
- high resolution
- electron microscopy
- energy transfer
- metal organic framework
- solid state
- single molecule
- magnetic resonance imaging
- mass spectrometry
- gas chromatography mass spectrometry
- photodynamic therapy
- ionic liquid
- highly efficient
- radiation therapy
- radiation induced
- gold nanoparticles
- solid phase extraction
- tandem mass spectrometry
- high density