Abstract SmMn2O5 has been reported as a promising substitute for noble metals to achieve highly efficient NO oxidation. In this work, the composites of carbon nanomaterials (carbon nanotubes and graphene oxide) and SmMn2O5 nanocrystals are successfully synthesized through a hydrothermal method, and their catalytic activities for NO oxidation are investigated as well. The performance evaluation indicates that the introduction of carbon nanotube and graphene oxide in the SmMn2O5 nanocrystal composites improve the activity for NO oxidation. Carbon nanotubes contribute to the improvement of the catalytic activity in the low-temperature region, while graphene oxide helps to increase activity in the high-temperature region. By the analysis of differential scanning calorimetry, the performance improvement of the NO oxidation is found to be dependent on the heat release of carbon nanomaterials in the different temperature regions. These results could provide a new way to improve the NO oxidation performance of SmMn2O5 nanocrystals.

中文翻译：

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高效催化氧化NO的碳纳米材料-SmMn2O5纳米晶复合材料

摘要 SmMn2O5 已被报道为一种很有前途的贵金属替代品，可实现高效的 NO 氧化。在这项工作中，通过水热法成功合成了碳纳米材料（碳纳米管和氧化石墨烯）和 SmMn2O5 纳米晶体的复合材料，并研究了它们对 NO 氧化的催化活性。性能评估表明，在 SmMn2O5 纳米晶复合材料中引入碳纳米管和氧化石墨烯提高了对 NO 氧化的活性。碳纳米管有助于提高低温区的催化活性，而氧化石墨烯有助于提高高温区的催化活性。通过差示扫描量热分析，发现 NO 氧化的性能改进取决于碳纳米材料在不同温度区域的热释放。这些结果可以为提高 SmMn2O5 纳米晶的 NO 氧化性能提供新的途径。