Tuning Ion Complexing To Rapidly Prepare Hollow Ag-Pt Nanowires with High Activity toward the Methanol Oxidization Reaction
Tuning Ion Complexing To Rapidly Prepare Hollow Ag-Pt Nanowires with High Activity toward the Methanol Oxidization Reaction
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调节离子络合快速制备对甲醇氧化反应具有高活性的空心银铂纳米线
DOI：
10.1002/chem.201804250
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Huang Shaoming
中科院分区：
文献类型：
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作者：
Liu Fangyan;Qi Peimei;Liang Xiaoli;Chen Wei;Li Benxia;Zhang Lijie;Yang Yun;Huang Shaoming
铂基空心纳米线在催化领域有着重要的应用。它们的制备通常包括两步过程，在此过程中制备M(M=Ag，Pd，Co，Ni)NW，然后在含有铂前驱体的溶液中进行电偶反应。由于PtIV/铂或PtII/铂对铂的氧化还原电位很高，因此铂原子总是先形成的，因此实现简单的一步制备是具有挑战性的。研究表明，合适的pH值可以降低PtIV/Pt的氧化还原电位，并可快速(10 分钟)一步制备出高质量的中空铂银纳米粒子。此外，该方法易于实现大规模制备。在电催化甲醇氧化反应(MOR)中，NW的组成可以很容易地进行调整，以优化其性能。与商用铂碳催化剂相比，具有合适的银铂比的纳米碳化硅催化剂具有较高的稳定性、活性和抗CO能力。
Hollow Pt‐based nanowires (NWs) have important applications in catalysis. Their preparation often involves a two‐step process in which M (M=Ag, Pd, Co, Ni) NWs are prepared and subsequently subjected to galvanic reaction in solution containing a Pt precursor. It is challenging to achieve a simple one‐step preparation, because the redox potential of PtIV/Pt or PtII/Pt to Pt is high, and therefore, Pt atoms always form first. This work demonstrates that an appropriate pH can decrease the redox potential of PtIV/Pt and allows the one‐step preparation of high‐quality hollow Pt–Ag NWs rapidly (10 min). Moreover, it is easy to realize large‐scale preparation with this method. The NW composition can be adjusted readily to optimize their performance in the electrocatalytic methanol oxidization reaction (MOR). Compared with commercial Pt/C, NWs with appropriate Ag/Pt ratios exhibit high stability, activity, and CO tolerance ability.