For crystalline catalysts with special morphology, the corners and edges are usually of high activities due to the presence of unsaturated coordination sites, so it will be an ideal strategy to promote catalytic properties by only keeping the corners and edges of such kinds of catalysts. In this work, a Cu₂O tetradecahedral nanocage with plenty of corners and edges was formed by selectively etching the (111) and (100) facets on the basis of a simple top-down method, in which SDS was used as a protective agent to keep the active corners and edges while hydroxylamine hydrochloride was used as a reducing agent and an etchant. The decomposition of ammonium perchlorate (AP) was used as a probe reaction to test its catalytic performance. It was found that the low temperature decomposition (LTD) and high temperature decomposition (HTD) were reduced by 27.1 °C and 107 °C, respectively, and the heat release increased by three times in comparison with pure AP. The Cu₂O nanocage exhibits excellent activity and high catalytic performance in the reaction. This work provides us an effective AP thermal decomposition catalyst and a simple strategy to fabricate a hollow structure with low-energy facets etched and highly active facets exposed.

中文翻译：

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保护Cu2O纳米笼上的高活性位：高氯酸铵分解的有效结晶催化剂

对于具有特殊形态的结晶催化剂，由于存在不饱和配位位点，拐角和边缘通常具有较高的活性，因此，仅保留此类催化剂的拐角和边缘将是提高催化性能的理想策略。在这项工作中，Cu ₂在简单的自上而下方法的基础上，通过选择性刻蚀（111）和（100）面，形成具有大量拐角和边缘的O十二面体纳米笼，其中SDS被用作保护剂以保持有效的拐角和边缘盐酸羟胺用作还原剂和蚀刻剂。高氯酸铵（AP）的分解被用作探针反应以测试其催化性能。发现低温分解（LTD）和高温分解（HTD）分别降低了27.1°C和107°C，并且放热量是纯AP的三倍。铜₂O纳米笼在反应中表现出优异的活性和高催化性能。这项工作为我们提供了一种有效的AP热分解催化剂和一种简单的策略来制造中空结构，该结构具有被蚀刻的低能量小平面和暴露的高活性小平面。