One-step synthesis of the PdPt bimetallic nanodendrites with controllable composition for methanol oxidation reaction

One-step synthesis of the PdPt bimetallic nanodendrites with controllable composition for methanol oxidation reaction
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一步合成用于甲醇氧化反应的成分可控的PdPt双金属纳米枝晶

DOI:
10.1007/s40843-017-9157-9
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发表时间:
2018-01
影响因子:
8.1
通讯作者:
Yida Deng
Yida Deng
中科院分区:
材料科学2区
文献类型:
--
作者:
Yuan Zhang;Jinfeng Zhang;Zelin Chen;Yunwei Liu;Mengmeng Zhang;Xiaopeng Han;Cheng Zhong;Wenbin Hu;Yida Deng

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This paper demonstrates a one-pot approach to produce highly dispersed dendritic palladium-platinum bimetallic nanoparticles (NPs) with small particle size, tunable composition and high catalytic activity. Herein, the PdPt bimetallic NPs have been obtained using bayberry tannin (BT) as both the reducing agent and surfactant. Additionally, the PdPt bimetallic NPs with different Pd/Pt atomic ratios can be prepared by just varying the amounts of the Pd and Pt precursors. Most importantly, the as-prepared Pd52Pt48 catalyst exhibits the optimal catalytic activities compared with the other compositional PdPt NPs (Pd82Pt18, Pd69Pt31, and Pd36 Pt64) and commercial Pt/C (20 wt.%) catalyst for the methanol oxidation reaction (MOR). Meanwhile, Pd52Pt48 also shows better CO tolerance, which can be attributed to the unique dendritic structure and the synergistic effect between Pd and Pt. With evident advantages of the facile preparation and enhanced catalytic performance, it holds great promise as a high-performance catalyst for electrochemical energy conversion.摘要本文利用一步法制备了具有小粒径、组成可控和高催化活性的高度分散的枝状PdPt双金属纳米颗粒. PdPt双金属纳米颗粒通过单宁酸(BT)作为还原剂和表面活性剂得到, 起到了简化工艺的作用. 此外, 具有不同Pd/Pt原子比的PdPt双金属纳米颗粒可以通过改变Pd和Pt前 躯体的量来获得. 与其他成分PdPt纳米颗粒(Pd82Pt18, Pd69Pt31, Pd36Pt64)和商业Pt/C(20 wt.%)催化剂相比, Pd52Pt48催化剂具有最高的甲醇氧化电催化活性, 这归因于其独特的树枝状结构以及Pd和Pt之间的协同效应. 该研究具有易于制备和高催化性能的优点, 在电化学能量转换高性能催化剂方面具有巨大的应用前景.
一种简便的回流程序,可增加活性表面位点,形成高活性和耐用的负载钯@铂双金属纳米枝晶
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