Abstract

Pt-Al₂O₃ aerogels were successfully synthesized via solution-freeze-drying-calcination technology. The structure of Pt-Al₂O₃ aerogels were analyzed by various characterization methods, which displayed that the Pt nanoparticles with a size of about 25 nm were uniformly attached on the surface of Al₂O₃ aerogel and the Al₂O₃ aerogel could effectively prevent the Pt nanoparticles from aggregating. Then, the as-prepared Al₂O₃ aerogel was used as catalyst support of Pt to catalyze the thermal decomposition of ammonium perchlorate. It proved that the thermal decomposition temperature of ammonium perchlorate was reduced from 418 to 347 °C and the heat release was increased from 165 to 1784 J/g. Therefore, Al₂O₃ aerogel was a good catalyst support of Pt for the thermal decomposition of ammonium perchlorate.

中文翻译：

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溶液-冻干-煅烧技术制备的Pt-Al 2 O 3复合气凝胶用于高氯酸铵的热分解

摘要

通过溶液冷冻干燥煅烧技术成功合成了Pt-Al ₂ O ₃气凝胶。通过各种表征方法对Pt-Al ₂ O ₃气凝胶的结构进行了分析，结果表明，粒径约25 nm的Pt纳米颗粒均匀地附着在Al ₂ O ₃气凝胶的表面，Al ₂ O ₃气凝胶可以有效地防止了Pt纳米粒子的聚集。然后，制备的Al ₂ O ₃气凝胶用作Pt的催化剂载体，以催化高氯酸铵的热分解。结果表明，高氯酸铵的热分解温度从418降低到347°C，放热从165 J / g增加到1784 J / g。因此，Al ₂ O ₃气凝胶对于高氯酸铵的热分解是Pt的良好催化剂载体。