Abstract

As an important chemical raw material and potential energy, the preparation method of NH₃ has gradually attracted the attention of scholars. Due to the increasing pressure on environmental protection and the growing reduction of energy resources, researchers have been committed to do the research on the reduction of N₂ to NH₃ by electric energy, instead of the traditional preparation method. The electric energy is a kind of environmental-protection material compared with traditional materials. However, there are still many defects of these methods, such as slow reaction kinetics and competitive hydrogen evolution reaction (HER). Therefore, how to improve the reaction rate and Faraday efficiency have become an urgent problem to be solved in the study of electrocatalytic nitrogen reduction. In this paper, Au³⁺ ions were electrostatically adsorbed on the surface of Ti₃C₂ nanosheets, which was a new ultra-thin two-dimensional conductive material, and Au@Ti₃C₂ samples with different contents were prepared by self-reduction of Au³⁺ ions to Au. The structure and performance tests showed that the Au nanoparticles on the surface of two-dimensional Ti₃C₂ nanosheets were nano sized. The nano scaled Au could promote the reduction of nitrogen and when the addition ratio of Au was 1%, Au@Ti₃C₂ showed the best performance and good stability.

摘要

作为一种重要的化工原料和势能，NH ₃的制备方法逐渐引起了学者们的关注。由于环保压力越来越大，能源资源日益减少，研究人员一直致力于将N ₂还原为NH _{3的研究。}用电能代替传统的制备方法。与传统材料相比，电能是一种环保材料。然而，这些方法仍存在反应动力学慢、竞争性析氢反应（HER）等诸多缺陷。因此，如何提高反应速率和法拉第效率成为电催化减氮研究中亟待解决的问题。本文将Au ³⁺离子静电吸附在新型超薄二维导电材料Ti ₃ C _{2纳米片表面，采用自旋法制备了不同含量的Au@Ti 3} C ₂样品。减少金³⁺离子为 Au。结构和性能测试表明，二维Ti ₃ C ₂纳米片表面的Au纳米颗粒是纳米级的。纳米级Au能促进氮的还原，当Au的添加比例为1%时，Au@Ti ₃ C ₂表现出最好的性能和良好的稳定性。