期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 20, 页码 17748-17752出版社
AMER CHEMICAL SOC
DOI: 10.1021/am5041412
关键词
dendritic pyramid cap; Pt(3)cu alloy; ultrathin branch; fuel oxidation; anti-CO poisoning
资金
- National Natural Science Foundation of China
- 863 Program [2012AA03A609]
- 973 Program [2011CBA00503, 2011CB932403, 2012CB932800]
- EPSRC [EP/G070326/1]
- COST Action [MP0903]
- Engineering and Physical Sciences Research Council [EP/G070326/1] Funding Source: researchfish
- EPSRC [EP/G070326/1] Funding Source: UKRI
Here we report on the synthesis of novel dendritic Pt3Cu triangular pyramid caps via a solvothermal coreduction method. These caps had three-dimensional caved structures with ultrathin branches, as evidenced by high-resolution transmission electron microscopy (HRTEM) and HAADF-STEM characterization. Tuning the reduction kinetics of two metal precursors by an iodide ion was believed to be the key for the formation of an alloyed nanostructure. Electro-oxidation of methanol and formic acid showed dramatically improved electrocatalytic activities and poison-tolerance for these nanoalloys as compared to commercial Pt/C catalysts, which was attributed to their unique open porous structure with interconnected network, ultrahigh surface areas, as well as synergetic effect of the two metallic components.
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