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<p>Azoxybenzene is an essential substance for the chemical industry. The catalytic reduction of nitroarenes from hydrogenation transfer is a mild, green and environment-friendly reaction process. Here, we synthesize nanorod CeO<sub>2</sub> catalysts, which present a stable 28% nitrobenzene conversion and 90% azoxybenzene selectivity without additives during the 22&#xa0;h reaction time at 140 <sup>o</sup>C and 5wt.% Nitrobenzene/ethanol fluid solution in a fixed bed reactor. In contract, nanoparticle CeO<sub>2</sub> only present about 2% nitrobenzene conversion at the same condition. Oxygen vacancies generated in CeO<sub>2</sub> (110) are critical for the adsorption and activation of nitrobenzene and ethanol, lead to a lower reaction energy barrier of r-CeO<sub>2</sub>.</p> Graphical Abstract <p></p>

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High Activity and Selectivity CeO2 Nanorod Catalysts for Azoxybenzene Synthesis from Transfer Hydrogenation of Nitrobenzene

  • 期刊论文

  • 发表日期：

    2025年2月12日

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  • Yuanlin Chen,
  • Lingli Wang,
  • Bing Liu

摘要

Azoxybenzene is an essential substance for the chemical industry. The catalytic reduction of nitroarenes from hydrogenation transfer is a mild, green and environment-friendly reaction process. Here, we synthesize nanorod CeO2 catalysts, which present a stable 28% nitrobenzene conversion and 90% azoxybenzene selectivity without additives during the 22 h reaction time at 140 oC and 5wt.% Nitrobenzene/ethanol fluid solution in a fixed bed reactor. In contract, nanoparticle CeO2 only present about 2% nitrobenzene conversion at the same condition. Oxygen vacancies generated in CeO2 (110) are critical for the adsorption and activation of nitrobenzene and ethanol, lead to a lower reaction energy barrier of r-CeO2.

Graphical Abstract