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Copper–Cobalt Oxide Nanoparticles with Tailored Cobalt Oxidation State and Lattice Oxygen Vacancy for Low-Temperature Ignition of Ammonium Dinitramide Monopropellants
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2024-04-04 , DOI: 10.1021/acsanm.3c05571 C. Shamjitha 1 , Anuj A. Vargeese 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2024-04-04 , DOI: 10.1021/acsanm.3c05571 C. Shamjitha 1 , Anuj A. Vargeese 1
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Ammonium dinitramide (ADN) ionic liquid monopropellants are recognized as suitable green substitutes for hydrazine and have attracted considerable research interest. However, the cold-start capability of a monopropellant is a critical requirement in propulsion applications, and ADN monopropellants are not cold-start capable. In this study, we introduce non-noble metal oxide-based Cu-incorporated Co3O4 (Cu–Co3O4) spinel nanoparticles for the low-temperature catalytic ignition of an ADN-based liquid monopropellant variant, LMP 103X. The Cu incorporation reduces the particle size and enhances the surface properties of Co3O4. The catalytic activity of Cu–Co3O4 for the decomposition of LMP 103X monopropellant was investigated by using a simultaneous thermal analyzer. The Cu–Co3O4 nanoparticles enhanced the reaction rate and showed better catalytic performance by lowering the decomposition temperature from 178 to 132 °C, with sudden decomposition of the entire propellant sample. More grain boundaries observed in Cu–Co3O4 possibly enhanced the adsorption and transport of reactant species across the catalyst. The synergistic effect of the high Co3+/Co2+ ratio, oxygen vacancies, pore volume, grain boundaries, and segregation of CuO enhanced the catalytic activity of the Cu-incorporated Co3O4. The efficiency of the catalyst is analyzed by the oxidation states of the transition metals, the abundance of active sites, and oxygen vacancies appearing on their surfaces.
中文翻译：
具有定制钴氧化态和晶格氧空位的铜钴氧化物纳米粒子，用于二硝酰胺铵单推进剂的低温点火
二硝酰胺铵（ADN）离子液体单组元推进剂被认为是肼的合适绿色替代品，并引起了广泛的研究兴趣。然而，单组元推进剂的冷启动能力是推进应用中的关键要求，而 ADN 单组元推进剂不具备冷启动能力。在这项研究中，我们引入了非贵金属氧化物基掺铜 Co 3 O 4 (Cu-Co 3 O 4 ) 尖晶石纳米颗粒，用于 ADN 基液体单组元推进剂 LMP 103X 的低温催化点火。 Cu的掺入减小了Co 3 O 4 的颗粒尺寸并且增强了Co 3 O 4的表面性质。通过同时热分析仪研究了Cu-Co 3 O 4对LMP 103X单组元推进剂分解的催化活性。 Cu-Co 3 O 4纳米颗粒通过将分解温度从178℃降低至132℃，提高了反应速率并表现出更好的催化性能，整个推进剂样品突然分解。在 Cu-Co 3 O 4中观察到的更多晶界可能增强了反应物在催化剂上的吸附和传输。高Co 3+ /Co 2+比、氧空位、孔体积、晶界和CuO偏析的协同效应增强了掺Cu Co 3 O 4的催化活性。催化剂的效率通过过渡金属的氧化态、活性位点的丰度以及其表面出现的氧空位来分析。
更新日期：2024-04-04
中文翻译：
具有定制钴氧化态和晶格氧空位的铜钴氧化物纳米粒子，用于二硝酰胺铵单推进剂的低温点火
二硝酰胺铵（ADN）离子液体单组元推进剂被认为是肼的合适绿色替代品，并引起了广泛的研究兴趣。然而，单组元推进剂的冷启动能力是推进应用中的关键要求，而 ADN 单组元推进剂不具备冷启动能力。在这项研究中，我们引入了非贵金属氧化物基掺铜 Co 3 O 4 (Cu-Co 3 O 4 ) 尖晶石纳米颗粒，用于 ADN 基液体单组元推进剂 LMP 103X 的低温催化点火。 Cu的掺入减小了Co 3 O 4 的颗粒尺寸并且增强了Co 3 O 4的表面性质。通过同时热分析仪研究了Cu-Co 3 O 4对LMP 103X单组元推进剂分解的催化活性。 Cu-Co 3 O 4纳米颗粒通过将分解温度从178℃降低至132℃，提高了反应速率并表现出更好的催化性能，整个推进剂样品突然分解。在 Cu-Co 3 O 4中观察到的更多晶界可能增强了反应物在催化剂上的吸附和传输。高Co 3+ /Co 2+比、氧空位、孔体积、晶界和CuO偏析的协同效应增强了掺Cu Co 3 O 4的催化活性。催化剂的效率通过过渡金属的氧化态、活性位点的丰度以及其表面出现的氧空位来分析。
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