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- Title
Ta 3 N 5 Nanobelt-Loaded Ru Nanoparticle Hybrids' Electrocatalysis for Hydrogen Evolution in Alkaline Media.
- Authors
Zhang, Xinyu; Xu, Lulu; Wu, Xingcai; Tao, Yourong; Xiong, Weiwei
- Abstract
Electrochemical hydrogen evolution is a highly efficient way to produce hydrogen, but since it is limited by high-cost electrocatalysts, the preparation of high-efficiency electrocatalysts with fewer or free noble metals is important. Here, Ta3N5 nanobelt (NB)-loaded Ru nanoparticle (NP) hybrids with various ratios, including 1~10 wt% Ru/Ta3N5, are constructed to electrocatalyze water splitting for a hydrogen evolution reaction (HER) in alkaline media. The results show that 5 wt% Ru/Ta3N5 NBs have good HER properties with an overpotential of 64.6 mV, a Tafel slope of 84.92 mV/dec at 10 mA/cm2 in 1 M of KOH solution, and good stability. The overpotential of the HER is lower than that of Pt/C (20 wt%) at current densities of 26.3 mA/cm2 or more. The morphologies and structures of the materials are characterized by scanning electron microscopy and high-resolution transmission electron microscopy, respectively. X-ray photoelectron energy spectroscopy (XPS) demonstrates that a good HER performance is generated by the synergistic effect and electronic transfer of Ru to Ta3N5. Our electrochemical analyses and theoretical calculations indicate that Ru/Ta3N5 interfaces play an important role as real active sites.
- Subjects
HYDROGEN evolution reactions; OXYGEN evolution reactions; NANOPARTICLES; SCANNING transmission electron microscopy; ELECTROCATALYSIS; X-ray photoelectron spectroscopy; TRANSMISSION electron microscopy
- Publication
Molecules, 2023, Vol 28, Issue 3, p1100
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules28031100