Ding Yu, Zhang Junbo, Guan Anxiang, Wang Qihao, Li Si, Al-Enizi Abdullah M, Qian Linping, Zhang Lijuan, Zheng Gengfeng
Laboratory of Advanced Materials, Department of Chemistry, Faculty of Chemistry and Materials Science, Fudan University, Shanghai, 200438, China.
Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
Nano Converg. 2021 May 10;8(1):14. doi: 10.1186/s40580-021-00264-9.
Two-dimensional MXene-based materials are potential of presenting unique catalytic performances of electrocatalytic reactions. The surface functionalization of MXene-based catalysts is attractive for developing efficient electrocatalysts toward nitrogen reduction reaction. Herein, we reported a TiCT MXene with a medium density of surface functionalized fluorine terminal groups, as an excellent N reduction reaction electrocatalyst with enhanced adsorption and activation of N. The TiCT MXene catalyst showed a production rate of ammonia as 2.81 × 10 μmol·s·cm, corresponding to a partial current density of 18.3 μA·cm and a Faradic efficiency of 7.4% at - 0.7 V versus reversible hydrogen electrode in aqueous solutions at ambient conditions, substantially exceeding similar TiCT MXene catalysts but with higher or lower densities of surface fluorine terminal groups. Our work suggests the capability of developing surface functionalization toolkit for enhancing electrochemical catalytic activities of two-dimensional MXene-based materials.
二维MXene基材料具有呈现电催化反应独特催化性能的潜力。基于MXene的催化剂的表面功能化对于开发高效的氮还原反应电催化剂具有吸引力。在此，我们报道了一种具有中等密度表面功能化氟端基的TiCT MXene，作为一种优异的氮还原反应电催化剂，对氮具有增强的吸附和活化作用。TiCT MXene催化剂在环境条件下的水溶液中，相对于可逆氢电极在-0.7 V时的氨生成速率为2.81×10 μmol·s·cm，对应于18.3 μA·cm的分电流密度和7.4%的法拉第效率，大大超过了具有更高或更低表面氟端基密度的类似TiCT MXene催化剂。我们的工作表明了开发表面功能化工具包以增强二维MXene基材料电化学催化活性的能力。
