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首页> 外文期刊>Crystal growth & design >From a Novel Energetic Coordination Polymer Precursor to Diverse Mn2O3 Nanostructures: Control of Pyrolysis Products Morphology Achieved by Changing the Calcination Atmosphere
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From a Novel Energetic Coordination Polymer Precursor to Diverse Mn2O3 Nanostructures: Control of Pyrolysis Products Morphology Achieved by Changing the Calcination Atmosphere

机译：从新型的高能配位聚合物前体到多样的Mn2O3纳米结构：通过改变煅烧气氛实现热解产物形态的控制

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摘要

A novel strategy to fabricate diverse alpha-Mn2O3 nanostructures from the nitrogen-rich energetic coordination polymer (ECP) [Mn(BTO)(H2O)(2)], (BTO = 1H,1'H-[5,5'-bitetrazole]-1,1'-bis(olate)) has been developed by changing the pyrolysis atmosphere. The results show that the energetic constituent and calcination environment are vital factors to get quite different morphologies of pyrolysis products. When the calcination reaction occurs under N-2 or O-2, rod-shaped mesoporous alpha-Mn2O3 with a large specific surface of 50.2 m(2).g(-1) and monodispersed alpha-Mn2O3 with a size of 10-20 nm can be obtained, respectively, which provides a new platform to prepare specific shapes and sizes of manganese oxides. Inspired by the transformation of 1 under O-2 atmosphere, we applied an in situ generated ultrafine alpha-Mn2O3 catalyst in the decomposition of ammonium perchlorate (AP) using ECP 1 as a precursor. The catalytic process of AP shows a remarkable decreased decomposition temperature (271 degrees C) and a narrower decomposition interval (from 253 to 275 degrees C). To our best knowledge, with such a low metal loading (0.65 wt %), the catalytic performance of in situ generated monodispersed ultrafine alpha-Mn2O3 is by far the best, which suggests that this ultraefficient catalyst has great potential in AP-based propellants.
机译：一种从富氮高能配位聚合物（ECP）[Mn（BTO）（H2O）（2）]，（BTO = 1H，1'H- [5,5'-Bittrazole]制备各种α-Mn2O3纳米结构的新策略] -1,1'-bis（olate））是通过改变热解气氛而开发的。结果表明，高能成分和煅烧环境是获得热解产物形态差异很大的重要因素。当在N-2或O-2下发生煅烧反应时，棒状介孔α-Mn2O3的比表面积大为50.2 m（2）.g（-1），单分散的α-Mn2O3的大小为10-20可以分别获得10 nm，这为制备特定形状和尺寸的氧化锰提供了新的平台。受O-2气氛下1转化的启发，我们将原位生成的超细α-Mn2O3催化剂用于以ECP 1为前体的高氯酸铵（AP）分解中。 AP的催化过程显示出明显降低的分解温度（271摄氏度）和更窄的分解间隔（从253到275摄氏度）。据我们所知，在如此低的金属负载量（0.65 wt％）下，原位生成的单分散超细α-Mn2O3的催化性能是迄今为止最好的，这表明这种超高效催化剂在AP型推进剂中具有巨大潜力。

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