Novel nanocatalysts were developed for selective hydrogenation of acetylene to ethylene. The mesoporous carbon nitride (MCN) was synthesized and employed as catalyst support that was loaded by Pd active sites. Moreover, for the first time, the Pd loaded MCN nanocatalysts were modified by different Ag/Pd ratios (in the range of 0.5:1, 1:1, and 3:1) which could bring about great results in terms of the acetylene conversion and ethylene selectivity. The prepared Ag–Pd/MCN nanocatalysts were thoroughly characterized by FESEM, TEM, BET, FTIR, and XRD methods. The catalytic performance of the nanocatalysts was evaluated in temperature range of 40–200 °C. It was found that loading Pd over the MCN results in better performances compared to the commercial Pd/$\alpha -$Alumina catalyst. Furthermore, modifying the Pd/MCN nanocatalysts by adding Ag led to significant performances with about 99.8% acetylene conversion. In addition, the ethylene selectivity of the sample prepared by using the optimum Ag/Pd ratio (1:1), reached 98.1% at 200 °C which is an excellent performance. The significant performance of the Ag–Pd/MCN (1:1) nanocatalyst in selective acetylene hydrogenation is attributed to the simultaneous roles of MCN catalyst support (with the surface area of 152 m²/g) and also the Ag modifiers which could modify the adsorption strength of the Pd active sites toward ethylene and accordingly enhance the ethylene selectivity.

开发了新型纳米催化剂，用于乙炔选择性加氢生成乙烯。合成了介孔氮化碳（MCN）并用作催化剂载体，负载有 Pd 活性位点。此外，首次通过不同的Ag/Pd比例（在0.5:1、1:1和3:1的范围内）对负载Pd的MCN纳米催化剂进行了改性，这可以在乙炔转化方面取得很好的效果和乙烯选择性。通过FESEM、TEM、BET、FTIR和XRD方法对制备的Ag-Pd/MCN纳米催化剂进行了全面表征。在40-200°C的温度范围内评估了纳米催化剂的催化性能。发现在 MCN 上加载 Pd 导致与商业 Pd/$\alpha -$氧化铝催化剂。此外，通过添加 Ag 对 Pd/MCN 纳米催化剂进行改性可产生显着的性能，乙炔转化率约为 99.8%。此外，采用最佳Ag/Pd比(1:1)制备的样品在200℃下乙烯选择性达到98.1%，性能优异。Ag-Pd/MCN (1:1) 纳米催化剂在选择性乙炔加氢中的显着性能归因于 MCN 催化剂载体（表面积为 152 m ² /g）和可以改性的 Ag 改性剂的同时作用Pd 活性位点对乙烯的吸附强度，从而提高了乙烯的选择性。