Surface-Enriched Single-Bi-Atoms Tailoring of Pt Nanorings for Direct Methanol Fuel Cells with Ultralow-Pt-Loading

Fan，Xiaokun2,3; Chen，Wen1; Xie，Lei1; Liu，Xianglong1,4; Ding，Yutian1; Zhang，Long4; Tang，Min3; Liao，Yujia3; Yang，Qi3; Fu，Xian Zhu1; Luo，Shuiping1,3; Luo，Jing Li1

2024-05-23

10.1002/adma.202313179

Advanced Materials   影响因子和分区

0935-9648

1521-4095

Single-atom decorating of Pt emerges as a highly effective strategy to boost catalytic properties, which can trigger the most Pt active sites while blocking the smallest number of Pt atoms. However, the rational design and creation of high-density single-atoms on Pt surface remain as a huge challenge. Herein, a customized synthesis of surface-enriched single-Bi-atoms tailored Pt nanorings (SE-Bi/Pt NRs) toward methanol oxidation is reported, which is guided by the density functional theory (DFT) calculations suggesting that a relatively higher density of Bi species on Pt surface can ensure a CO-free pathway and accelerate the kinetics of *HCOOH formation. Decorating Pt NRs with dense single-Bi-atoms is achieved by starting from PtBi intermetallic nanoplates (NPs) with intrinsically isolated Bi atoms and subsequent etching and annealing treatments. The SE-Bi/Pt NRs exhibit a mass activity of 23.77 A mg Pt toward methanol oxidation in alkaline electrolyte, which is 2.2 and 12.8 times higher than those of Pt-Bi NRs and Pt/C, respectively. This excellent activity endows the SE-Bi/Pt NRs with a high likelihood to be used as a practical anodic electrocatalyst for direct methanol fuel cells （DMFCs） with high power density of 85.3 mW cm and ultralow Pt loading of 0.39 mg cm.

electrocatalysis fuel cells methanol oxidation nanorings single-atom tailoring

SCI ; EI

英语

通讯

MATERIALS SCIENCE

2-s2.0-85185489280

Scopus

1.Shenzhen Key Laboratory of Energy Electrocatalytic Materials,College of Materials Science and Engineering,Shenzhen University,Shenzhen,Guangdong,518055,China
2.Bay Area Center for Electron Microscopy,Songshan Lake Materials Laboratory,Dongguan,523808,China
3.Department of Chemistry,Guangdong Provincial Key Laboratory of Energy Materials for Electric Power,Southern University of Science and Technology (SUSTech),Shenzhen,Guangdong,518055,China
4.School of Physics,State Key Laboratory of Powder Metallurgy,Central South University,Changsha,410083,China

Fan，Xiaokun,Chen，Wen,Xie，Lei,et al. Surface-Enriched Single-Bi-Atoms Tailoring of Pt Nanorings for Direct Methanol Fuel Cells with Ultralow-Pt-Loading[J]. Advanced Materials,2024,36(21).

Fan，Xiaokun.,Chen，Wen.,Xie，Lei.,Liu，Xianglong.,Ding，Yutian.,...&Luo，Jing Li.(2024).Surface-Enriched Single-Bi-Atoms Tailoring of Pt Nanorings for Direct Methanol Fuel Cells with Ultralow-Pt-Loading.Advanced Materials,36(21).

Fan，Xiaokun,et al."Surface-Enriched Single-Bi-Atoms Tailoring of Pt Nanorings for Direct Methanol Fuel Cells with Ultralow-Pt-Loading".Advanced Materials 36.21(2024).