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Preparation of Pt-skin PtRhNi Nanoframes Decorated with Small SnO2 Nanoparticles as an Efficient Catalyst for Ethanol Oxidation Reaction
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-06-04 00:00:00 , DOI: 10.1021/acsami.9b04690 Grzegorz Gruzeł 1 , Przemysław Piekarz 1 , Mirosława Pawlyta 2 , Mikołaj Donten 3, 4 , Magdalena Parlinska-Wojtan 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-06-04 00:00:00 , DOI: 10.1021/acsami.9b04690 Grzegorz Gruzeł 1 , Przemysław Piekarz 1 , Mirosława Pawlyta 2 , Mikołaj Donten 3, 4 , Magdalena Parlinska-Wojtan 1
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Pt-based nanoframes are one of the most promising catalysts for ethanol oxidation reaction in direct ethanol fuel cells. It is important to understand the mechanisms responsible for creating these hollow nanoframe-based catalysts. Herein, for the first time, Pt-skin PtRhNi rhombic dodecahedral nanoframes were decorated with small SnO2 nanoparticles and were used as an efficient catalyst for the ethanol oxidation reaction. Moreover, by combining the ex situ scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy observations at various stages of synthesis, along with density functional theory calculations, it was possible to track the synthesis route of solid rhombic dodecahedral PtRhNi nanoparticles, which are the precursors of PtRhNi nanoframes. After the chemical etching of the Ni core from solid PtRhNi nanoparticles, the obtained nanoframes were decorated with SnO2 nanoparticles. The resulting SnO2@PtRhNi heteroaggregates were deposited on high-surface-area carbon and electrochemically tested, showing a 6-fold higher mass activity and 10-fold higher specific activity toward ethanol oxidation reaction than commercially available Pt catalysts.
中文翻译：
SnO 2纳米小颗粒修饰的Pt皮PtRhNi纳米骨架的制备作为乙醇氧化反应的有效催化剂
基于Pt的纳米框架是直接乙醇燃料电池中乙醇氧化反应最有希望的催化剂之一。重要的是要了解造成这些中空的纳米框架为基础的催化剂的机制。在这里，第一次，Pt皮肤PtRhNi菱形十二面体纳米框架装饰有小的SnO 2纳米颗粒，并被用作乙醇氧化反应的有效催化剂。此外，通过在合成的各个阶段结合异位扫描透射电子显微镜和能量色散X射线光谱学观察，再结合密度泛函理论计算，可以追踪固体菱形十二面体PtRhNi纳米粒子的合成路线。 PtRhNi纳米框架的前体。从固态PtRhNi纳米粒子化学刻蚀Ni核后，将获得的纳米框架用SnO 2纳米粒子装饰。生成的SnO 2PtRhNi杂聚集体被沉积在高表面积碳上并进行了电化学测试，与乙醇相比，其对乙醇氧化反应的质量活性高6倍，比活性高10倍。
更新日期：2019-06-04
中文翻译：
SnO 2纳米小颗粒修饰的Pt皮PtRhNi纳米骨架的制备作为乙醇氧化反应的有效催化剂
基于Pt的纳米框架是直接乙醇燃料电池中乙醇氧化反应最有希望的催化剂之一。重要的是要了解造成这些中空的纳米框架为基础的催化剂的机制。在这里，第一次，Pt皮肤PtRhNi菱形十二面体纳米框架装饰有小的SnO 2纳米颗粒，并被用作乙醇氧化反应的有效催化剂。此外，通过在合成的各个阶段结合异位扫描透射电子显微镜和能量色散X射线光谱学观察，再结合密度泛函理论计算，可以追踪固体菱形十二面体PtRhNi纳米粒子的合成路线。 PtRhNi纳米框架的前体。从固态PtRhNi纳米粒子化学刻蚀Ni核后，将获得的纳米框架用SnO 2纳米粒子装饰。生成的SnO 2PtRhNi杂聚集体被沉积在高表面积碳上并进行了电化学测试，与乙醇相比，其对乙醇氧化反应的质量活性高6倍，比活性高10倍。
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