期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 16, 页码 14745-14752出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b22268
关键词
top-down; dealloying Co(OH)(2); 2D nanosheets; electrochemical water splitting
资金
- National Natural Science Foundation of China [51702031, 51871077, 51502092]
- Shenzhen Fundamental Research Program [JCYJ20180306171644942, JCYJ20180507184623297, KOJSCX20180328165656256]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [TP2015028]
Two-dimensional (2D) nanomaterials decorated with ultrasmall and well-alloyed bimetallic nanoparticles (NPs) have many important applications. Developing a facile and scalable 2D material/hybrid synthesis strategy is still a big challenge. Herein, a top-down corrosion strategy is developed to prepare ultrathin cobalt (oxy)-hydroxide nanosheets decorated with ultrasmall (similar to 1.6 nm) alloy NPs. The formation of ultrathin (oxy)hydroxide nanosheets has a restrain effect to prevent the growth of small NPs into bigger ones. Thanks to the ultrathin 2D nature and strong electronic interaction between Co(OH)(2) and alloy NPs, the Pt-based binary alloy NPs are greatly stabilized by the Co(OH)(2) nanosheets and the hybrids exhibit much enhanced electrocatalytic performance for water splitting. Especially, the mass activities of the PtPd- and PtCu-decorated samples for hydrogen evolution are similar to 8 times that of Pt/C. When used as both cathode and anode electrocatalysts to split water, the hybrid nanosheets outperform the commercial Pt/C-RuO2 combination. At 10 mA cm(-2), the needed potential is only 1.53 V. This work provides us a highly controllable and scalable means to produce clean 2D nanomaterials decorated with a series of alloy NPs such as PtPd, PtCu, AuNi, and so forth.
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