期刊
CHEMICAL ENGINEERING JOURNAL
卷 392, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.123655
关键词
Chemical engineering; Metal single atoms; Electrospinning; Hydrogen evolution reaction; Materials chemistry
资金
- National Natural Science Foundation of China (NSFC) [51573166, 51803077]
- Natural Science Foundation of Jiangsu Province [BK20180627]
- Postdoctoral Science Foundation of China [2018M630517, 2019T120389]
- MOE & SAFEA, 111 Project [B13025]
- Fundamental Research Funds for the Central Universities
- national first-class discipline program of Light Industry Technology and Engineering [LITE2018-19]
The challenges for preparing metal single atoms (MSAs) catalysts are facile synthesis approaches and the suitable supports with strong coordination to stabilize MSAs. Herein, we reported a facile strategy to synthesize the Ru single atoms (Ru SAs) through the dynamic transformation from clusters to single atoms by combining the electrospun technology and NH3-assisted graphitization process. The small Ru nanoclusters (NCs) supported on carbon nanofibers (CNFs) were in situ converted into Ru SAs in N-doped CNFs under the NH3 treatment. Through controlling the NH3 treatment time and graphitization temperatures, the Ru nanocrystals exhibit a dynamic transformation from nanoclusters to single atoms. The results indicate that the Ru NCs with larger amounts of Ru SAs exhibit superior HER activity in alkaline media with low overpotential of 34 mV at 20 mA cm(-2), which is even significantly better than commercial PVC catalysts. The mass activity of Ru SAs/NCNFs is about 390 A g(Ru)(-1) at an overpotential of 100 mV, which is similar to 3.5 times higher than that of commercial PVC (110 A g(Pt)(-1)). This strategy will provide a new way for the large-scale production of MSAs transformed from different metal nanoparticles or nanoclusters.
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