A new approach for preparing a PtO_x/CeO₂ catalyst for low‐temperature CO oxidation has been developed. The approach includes; i) preparation of a CeO₂ support through the controllable thermal decomposition of Ce(NO₃)₃ ⋅ 6H₂O, and then ii) deposition of polynuclear platinum nitrato complexes ([H₃O⊂18‐crown‐6]₂[Pt₂(μ²‐OH)₂(NO₃)₈][Pt₄(μ³‐OH)₂(μ²‐OH)₄(NO₃)₁₀]) on the CeO₂ support. The NO₃⁻‐rich ceria support produced at the onset temperature of Ce(NO₃)₃ ‐> CeO₂ transformation (220 °C) yields the “PtO_x/CeO₂‐220” catalyst that shows intriguingly high activity in CO oxidation, at room temperature and below. To understand the nature of the low‐temperature catalytic activity, prepared catalysts have been studied using X‐ray photoelectron spectroscopy (XPS), Raman and operando X‐ray absorption fine structure spectroscopy (XAFS) and transmission electron microscopy (TEM).

中文翻译：

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硝酸铈（III）衍生的CeO2载体可稳定用于室温CO氧化的PtOx活性物种

开发了一种制备用于低温CO氧化的PtO _x / CeO ₂催化剂的新方法。该方法包括；ⅰ）的CeO制剂₂通过Ce的可控热分解支撑（NO ₃）₃  ⋅6H ₂ O，然后ⅱ）多核铂硝酸根复合物沉积（[H ₃ O⊂18冠-6] ₂ [铂₂（μ ² -OH）₂（NO ₃）₈ ] [PT ₄（μ ³ -OH）₂（μ ² -OH）₄（NO ₃）₁₀ ]）放在CeO ₂ 支架上。的NO ₃ ^-以铈（NO的起始温度产生富氧化铈载体₃）₃ - >的CeO ₂的转化（220℃），得到“的PtO _X /的CeO ₂ -220”催化剂的是示出了CO氧化有趣的高活性，在室温及以下。为了了解低温催化活性的性质，已使用X射线光电子能谱（XPS），拉曼光谱和操作X射线吸收精细结构光谱（XAFS）和透射电子显微镜（TEM）对制备的催化剂进行了研究。