期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 39, 页码 33775-33790出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b08327
关键词
electrocatalysis; Pd-based catalysts; alloys; Ppy nanofibers; ethanol electrooxidation
资金
- Council of Scientific & Industrial Research (CSIR), India
- Department of Science and Technology (DST), Government of India
Fabrication of multimetallic nanocatalysts with controllable composition remains a challenge for the development of low-cost electrocatalysts, and incorporating metal-based catalysts into active carbon nanoarchitectures represents an emerging strategy to improve the catalytic performance of electrocatalysts. Herein, a facile method developed for Pd nanoparticle (NP)-based multimetallic alloys incorporated oh polypyrrole (Ppy) nanofibers by in situ nucleation and growth of NPs using colloidal radiolytic technique is described, Electrochemical measurement suggests that the as-prepared catalysts demonstrate dramatically enhanced electrocatalytic activity for ethanol oxidation in alkaline medium. The ultrasmall Pd30Pt29Au41/Ppy nanohybrids (similar to 8 nm) exhibit excellent electrocatalytic activity, which is similar to 5.5 times higher than that of its monometallic counterparts (12 A/mg Pd, 5 times higher activity compared to that of Pd/C catalyst). Most importantly, the ternary nanocatalyst shows no obvious change in chemical structure and long-term stabllity, reflected in the 2% loss in forward current density during 1000 cycles. The superior catalytic activity and durabllity of the nanohybrids have been achieved due to the formation of Pt-Pd-Au heterojunctions with cooperative action of the three metals in the alloy composition, and the strong interactions between the Ppy nanofiber support with the metal NPs. The facile synthetic approach provides a new generation of polymer-supported metal alloy hybrid nanostructures as potential electrocatalysts with superior catalytic activity for fuel cell applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据