简便合成三元PtPdCu合金六足体作为甲醇氧化的高效电催化剂。
Facile synthesis of ternary PtPdCu alloy hexapods as highly efficient electrocatalysts for methanol oxidation.
作者信息
Gao Na, Wu Xingqiao, Li Xiao, Huang Jingbo, Li Dongsheng, Yang Deren, Zhang Hui
机构信息
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University Hangzhou 310027 P. R. China
出版信息
RSC Adv. 2020 Mar 30;10(21):12689-12694. doi: 10.1039/d0ra00963f. eCollection 2020 Mar 24.
Developing an efficient Pt-based multimetallic electrocatalyst with well-defined shapes for methanol oxidation reaction (MOR) is critical, however, it still remains challenging. Here we report a one-pot approach for the synthesis of ternary PtPdCu alloy hexapods with different compositions. Their MOR activities increased in the sequence PtPdCu < PtPdCu < PtPdCu, and were substantially higher than that of commercial Pt/C. Specifically, the PtPdCu hexapods exhibited the highest mass (0.97 mA μg ) and specific (7.39 mA cm) activities towards MOR, and were 5.4 and 19.4 times higher than those of commercial Pt/C (0.18 mA μg and 0.38 mA cm), respectively. This enhancement could be probably attributed to the bifunctional mechanism and ligand effect through the addition of Cu and Pd as well as the unique dendritic structure. The better tolerance for CO poisoning also endowed the PtPdCu hexapods with superior durability relative to commercial Pt/C.
开发一种用于甲醇氧化反应（MOR）的具有明确形状的高效铂基多金属电催化剂至关重要，然而，这仍然具有挑战性。在此，我们报告了一种一锅法合成具有不同组成的三元PtPdCu合金六足体的方法。它们的甲醇氧化反应活性按PtPdCu < PtPdCu < PtPdCu的顺序增加，并且显著高于商业Pt/C催化剂。具体而言，PtPdCu六足体对甲醇氧化反应表现出最高的质量活性（0.97 mA μg）和比活性（7.39 mA cm），分别比商业Pt/C催化剂（0.18 mA μg和0.38 mA cm）高5.4倍和19.4倍。这种活性增强可能归因于通过添加铜和钯的双功能机制和配体效应以及独特的树枝状结构。相对于商业Pt/C催化剂，对一氧化碳中毒更好的耐受性也赋予了PtPdCu六足体卓越的耐久性。
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