Atom efficiency, low temperature, low pressure, and a nontoxic hydrogen source as a reducing agent are ideal reaction conditions for the reduction of nitroarenes. In this work, an efficient catalyst comprising hollow nano-mesosilica spheres loaded with Rh nanoparticles supported on nitrogen-doped carbon was developed. Rh nanoparticles were stabilized and uniformly dispersed by nitrogen atoms, and the inner N-doped carbon shell was used to adsorb reaction substrates and improve catalytic activity. The catalyst showed remarkable activity (maximum yield at 1.5 h) and selectivity (100 %) for the reduction of nitrobenzene at lower temperature (80 °C), atmospheric pressure (1 atm), and without base under aqueous conditions. Moreover, the hydrothermal stability of this nanocatalyst was better than other catalysts in boiling water at 100 °C for 48 h and effectively prevented the aggregation and leaching of Rh NPs during the reaction.

中文翻译：

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载有氮掺杂碳的载有铑纳米粒子的中空纳米介孔二氧化硅球：在温和条件下还原硝基芳烃的高效催化剂。

原子效率，低温，低压和无毒的氢源作为还原剂是还原硝基芳烃的理想反应条件。在这项工作中，开发了一种高效的催化剂，该催化剂包含负载有掺杂氮的碳负载的Rh纳米粒子的中空纳米介孔二氧化硅球。Rh纳米颗粒被氮原子稳定并均匀分散，内部的N掺杂碳壳用于吸附反应底物并提高催化活性。该催化剂在较低温度（80°C），大气压（1 atm）且在水性条件下不加碱的条件下显示出显着的活性（在1.5 h时最大产率）和选择性（100％）还原硝基苯。而且，