Ultrafine Ru nanoparticles derived from few- layered Ti3C2Tx MXene templated MOF for highly efficient alkaline hydrogen evolution

作者：Luo, Rong; Li, Zhenyu; Li, Ruixiang; Jiang, Chunli; Qi, Ruijuan; Liu, Mengqin; Lin, Hechun; Huang, Rong; Luo, Chunhua^*; Peng, Hui

来源：International Journal of Hydrogen Energy, 2022, 47(77): 32787-32795.

DOI：10.1016/j.ijhydene.2022.07.205

• Ruthenium
• ZIF-L(Co) MOF
• MXene
• Hydrogen evolution reaction
• Electrochemical catalyst

It is meaningful to search high-efficient and inexpensive electrocatalysts for hydrogen evolution reaction (HER) due to the energy crisis and environmental pollution. Here, we report the preparation of ultrafine Ru nanoparticles from a hybrid of ZIF-L(Co) MOF and polydopamine coated few-layered Ti3C2Tx MXene (FL-Ti3C2Tx). FL-Ti3C2Tx is used as a template to grow regular leaf-shaped ZIF-L(Co) nanosheets through the reaction of Co ions anchored on the MXene surface with 2-methylimidazole. The obtained hybrid is then doped with Ru ions through ion exchange between Ru and Co ions, followed by thermal annealing at a temperature of 350 degrees C in an Ar atmosphere to produce ultrafine Ru nano -particles. The obtained Ru@ZIF-L(Co)/FL-Ti3C2Tx nanocomposite shows outstanding HER performance with a low overpotential of 16.2 mV at a current density of 10 mA cm-2, a small Tafel slope of 21.0 mV dec-1 and excellent stability in 1.0 M KOH solution. This work provides a new strategy for the design and synthesis of highly efficient HER catalyst via MOFs with tunable composition and structure.

• 单位
  衡阳师范学院