Synthesis of a Au‐on‐Pd Heteronanostructure Stabilized by Citrate and its Catalytic Application |
| |
| Authors: | Zhifei Wang Shuang Zheng Neng Wan Liming Zhang Qilong Wang Nongyue He Yaji Huang |
| |
| Institution: | 1. School of Chemistry and Chemical Engineering, Southeast University, , Nanjing, 211189 China;2. School of Electronic Science and Engineering, Southeast University, , Nanjing, 210096 China;3. School of Biological Science and Medical Engineering, Southeast University, , Nanjing, 210096 China;4. School of Energy and Environment, Southeast University, , Nanjing, 210096 China |
| |
| Abstract: | The preparation of Au‐on‐Pd heteronanostructure (HNS) using citrate‐stabilized polycrystalline Pd nanoparticles (NPs) as the seeds is described. The resulting Au‐on‐Pd HNS is characterized and it is found that the formation of Au‐on‐Pd HNS depends greatly on a ratio between Pd seeds and AuCl4? ions added and the optimal molar ratio is 10:1. If fewer AuCl4? ions are added (Pd/Au ratio is 100:1), the growth of Au NPs only occurs on part of the Pd seeds’ surface. The addition of more AuCl4? ions (Pd/Au ratio is 5:1) hinders the growth of Au NPs on the Pd seeds’ surface. To demonstrate the catalytic performance, the electrochemistry oxidation of ethanol and the reduction of p‐nitrophenol by NaBH4 are chosen to examine the catalytic activity of Au‐on‐Pd HNS. Pd seeds, Au NPs, and poly(vinyl pyrrolidone) (PVP)‐stabilized PdAu nanoalloy are used as the references for comparison. In the first reaction, the catalytic reactivity of Au‐on‐Pd HNS is better than that of corresponding pure Pd or Au NPs, while the opposite occurs for the latter reaction. The catalytic activity of Au‐on‐Pd HNS is much higher than that of PVP‐stabilized PdAu nanoalloy. |
| |
| Keywords: | Au‐on‐Pd heteronanostructures bimetallic nanoparticles catalytic performances citrate‐stabilized Pd seeds |
|
|
