Ultrathin and Defect-rich Intermetallic Pd2Sn Nanosheets for Efficient Oxygen Reduction Electrocatalysis

Content Provider	Semantic Scholar
Author	Liang, Jiashun Li, Shenzhou Chen, Yawen Liu, Xuan Wang, Ting-Ting Han, Jiantao Jiao, Shuhong Cao, Ruiguo Li, Qi-Chao
Copyright Year	2020
Abstract	Atomic ordering engineering has been a promising strategy to improve the catalytic activity and stability of Pt-based alloy catalysts for oxygen reduction reaction (ORR) for proton exchange membrane fuel cells (PEMFCs). However, the synthesis of shape-controlled ordered nanocrystals, especially in a two-dimensional (2D) architecture, still remains a great challenge. Herein, 2D Pd2Sn nanosheets (NSs) with unique Pd-Sn ordering are developed as efficient ORR electrocatalysts for the first time. The ordered Pd2Sn NSs exhibit the mass activity of 2.5 A mgPd-1 at 0.9 V vs. reversible hydrogen electrode and outstanding durability, much superior to that of disordered counterpart, commercial Pt/C, and most of the reported Pd-based ORR catalysts. The outstanding activity and stability can be ascribed to the unique 2D defect-rich morphology, thermodynamically stabilized intermetallic structure, and the optimized Pd-O binding due to Sn incorporation.
File Format	PDF HTM / HTML
DOI	10.1039/d0ta01767a
Alternate Webpage(s)	http://www.rsc.org/suppdata/d0/ta/d0ta01767a/d0ta01767a1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/d0ta01767a
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article