期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 283, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119628
关键词
PdAg alloy nanoparticles; N-doped microporous hollow carbon spheres; CO2 hydrogenation
资金
- JSPS KAKENHI, Japan [18K14056, 19H00838]
- JST, PRESTO, Japan [JPMJPR19T3]
- cooperative research program of Network Joint Research Center for Materials and Devices [20201097]
- Artificial Photosynthesis, Osaka City University
- China Scholarship Council [201808310132]
- Elements Strategy Initiative of MEXT, Japan [JPMXP0112101003]
- Grants-in-Aid for Scientific Research [18K14056] Funding Source: KAKEN
The optimized PdAg@NMHCS catalyst exhibits extraordinary activity for CO2 hydrogenation to formate, with high TOF values. Different carbonization temperatures affect the catalyst performance, and nitrogen-doped MHCS help reduce the activation energy for CO2 hydrogenation.
Here, we report a general synthesis approach to produce PdAg nanoparticles (NPs) that are dispersed uniformly within N-doped microporous hollow carbon spheres (NMHCS) for hydrogenation of CO2 to formate. The optimized PdAg@NMHCS catalyst, which was obtained by using an optimized amount of ethylenediamine as the nitrogen source and pyrolyzed at 500 degrees C, exhibits extraordinary activity for CO2 hydrogenation to formate, showing a high turnover number (TON) of 640 and 2750 at 100 degrees C after 2 and 24 h, respectively. Experiments reveal that different carbonization temperatures cause changes in the surface area, the nitrogen content of NMHCS, PdAg NPs dispersion, and the formation of Pd-N bonds. Upon consideration of kinetic analyses, N doped MHCS are not only effective for the adsorption of CO2 due to the doping of nitrogen but also would reduce the activation energy barrier for CO2 hydrogenation to formate by facilitating including CO2 adsorption/insertion step and H-2 dissociation step.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据