The hollow noble metal nanostructures have attracted wide attention in catalysis/electrocatalysis. Here a two‐step procedure for constructing hollow Rh nanospheres (Rh H‐NSs) with clean surface is described. By selectively removing the surfactant and Au core of Au‐core@Rh‐shell nanostructures (Au@Rh NSs), the surface‐cleaned Rh H‐NSs are obtained, which contain abundant porous channels and large specific surface area. The as‐prepared Rh H‐NSs exhibit enhanced inherent activity for the methanol oxidation reaction (MOR) compared to state‐of‐the‐art Pt nanoparticles in alkaline media. Further electrochemical experiments show that Rh H‐NSs also have high activity for the electrooxidation of formaldehyde and formate (intermediate species in the course of the MOR) in alkaline media. Unfortunately, Rh H‐NSs have low electrocatalytic activity for the ethanol and 1‐propanol oxidation reactions in alkaline media. All electrochemical results indicate that the order of electrocatalytic activity of Rh H‐NSs for alcohol oxidation reaction is methanol (C₁) > ethanol (C₂) > 1‐propanol (C₃). This work highlights the synthesis route of Rh hollow nanostructures, and indicates the promising application of Rh nanostructures in alkaline direct methanol fuel cells.

中文翻译：

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选择性蚀刻诱导合成用于醇氧化反应的空心Rh纳米球电催化剂

中空的贵金属纳米结构在催化/电催化中引起了广泛的关注。这里描述了构建具有清洁表面的空心Rh纳米球（Rh H-NSs）的两步过程。通过有选择地去除Au-core @ Rh-壳纳米结构（Au @ Rh NSs）的表面活性剂和Au核，可以得到表面清洁的Rh H-NS，其中包含丰富的多孔通道和大的比表面积。与碱性介质中最新的Pt纳米颗粒相比，所制备的Rh H-NS在甲醇氧化反应（MOR）中表现出更高的固有活性。进一步的电化学实验表明，Rh H-NSs在碱性介质中对甲醛和甲酸（MOR过程中的中间物种）的电氧化也具有很高的活性。很遗憾，Rh H-NS对碱性介质中的乙醇和1-丙醇氧化反应具有较低的电催化活性。所有电化学结果均表明，Rh H-NSs对醇氧化反应的电催化活性顺序为甲醇（C₁）>乙醇（C ₂）> 1-丙醇（C ₃）。这项工作突出了Rh空心纳米结构的合成路线，并表明Rh纳米结构在碱性直接甲醇燃料电池中的有希望的应用。