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- Title
多孔碳负载钌单原子和钌纳米团簇催化剂 用于高效析氢反应.
- Authors
李创; 王宇; 候利强; 刘希恩
- Abstract
The preparation of electrocatalyst for high efficiency hydrogen evolution reaction (HER) is of great significance to the large-scale promotion of hydrogen energy. In this paper, using sodium carboxymethyl cellulose (CMCNA) and RuCl3 as raw materials, Ru-CMC-Na hydrogel was prepared by the coordination of Ru ions with CMC-Na in solution. Then, porous carbon supported Ru single atom and Ru nanocluster catalyst RuSA+NC/C-2 was prepared by freeze-drying, high temperature annealing and pickling. The catalyst RuSA+NC/C-2 shows excellent HER activity and stability in both acidic and alkaline electrolytes, reaching 10 mA·cm−2 current density at 20 mV and 23 mV, respectively. After 12 h chronoamperometry test, the activity of RuSA+NC/C-2 shows no obvious attenuation. The mass activity of RuSA+NC/C-2 is 5.8 times that of commercial Pt/C when the overpotential is 0.05 V in 1 mol/L KOH electrolyte. The physical characterization of RuSA+NC/C-2 catalyst shows that the porous structure and large specific surface area of RuSA+NC/C-2 catalyst can expose more active sites. Ru single atom and Ru nanocluster structure improve the utilization rate of Ru atom. XPS analysis shows that there is a strong interaction between Ru and carbon support, resulting in the formation of electron-deficient Ru, thus improving HER activity of the catalyst. The preparation of electrocatalyst for high efficiency hydrogen evolution reaction (HER) is of great significance to the large-scale promotion of hydrogen energy. In this paper, using sodium carboxymethyl cellulose (CMCNA) and RuCl3 as raw materials, Ru-CMC-Na hydrogel was prepared by the coordination of Ru ions with CMC-Na in solution. Then, porous carbon supported Ru single atom and Ru nanocluster catalyst RuSA+NC/C-2 was prepared by freeze-drying, high temperature annealing and pickling. The catalyst RuSA+NC/C-2 shows excellent HER activity and stability in both acidic and alkaline electrolytes, reaching 10 mA·cm−2 current density at 20 mV and 23 mV, respectively. After 12 h chronoamperometry test, the activity of RuSA+NC/C-2 shows no obvious attenuation. The mass activity of RuSA+NC/C-2 is 5.8 times that of commercial Pt/C when the overpotential is 0.05 V in 1 mol/L KOH electrolyte. The physical characterization of RuSA+NC/C-2 catalyst shows that the porous structure and large specific surface area of RuSA+NC/C-2 catalyst can expose more active sites. Ru single atom and Ru nanocluster structure improve the utilization rate of Ru atom. XPS analysis shows that there is a strong interaction between Ru and carbon support, resulting in the formation of electron-deficient Ru, thus improving HER activity of the catalyst.
- Subjects
SODIUM carboxymethyl cellulose; HYDROGEN evolution reactions; HYDROGEN as fuel; RUTHENIUM catalysts; OXYGEN evolution reactions; RAW materials; FULLERENES
- Publication
Acta Materiae Compositae Sinica, 2023, Vol 40, Issue 4, p2155
- ISSN
1000-3851
- Publication type
Article
- DOI
10.13801/j.cnki.fhclxb.20220512.001