Tuning d-Band Center of Pt by PtCo-PtSn Heterostructure for Enhanced Oxygen Reduction Reaction Performance

被引：97

作者：

Chen, Jinli ^{[1
]}

Qian, Guangfu ^{[1
]}

Chu, Bingxian ^{[1
]}

Jiang, Zexing ^{[1
]}

Tan, Kexin ^{[1
]}

Luo, Lin ^{[1
]}

Li, Bin ^{[1
]}

Yin, Shibin ^{[1
]}

机构：

[1] Guangxi Univ, Coll Chem & Chem Engn, Sch Phys Sci & Technol, State Key Lab Proc Nonferrous Met & Featured Mat, 100 Daxue Rd, Nanning 530004, Peoples R China

来源：

SMALL | 2022年 / 18卷 / 12期

基金：

中国国家自然科学基金;

关键词：

catalysts; d-band center; heterostructures; interface engineering; oxygen reduction reaction; POROUS CARBON; ELECTROCATALYSTS; SURFACE; NANOPARTICLES; CATALYST; DEPOSITION; STABILITY; HETEROJUNCTION; EFFICIENCY; STRATEGY;

D O I：

10.1002/smll.202106773

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The development of efficient and stable Pt-based catalysts is significant but challenging for fuel cells. Herein, Sn and Co elements are introduced into Pt to form PtCo-PtSn/C heterostructure for enhancing the oxygen reduction reaction (ORR). Electrochemical results indicate that it has remarkable ORR intrinsic activity with a high mass activity (1,158 mA mg(-1) Pt) at 0.9 V in HClO4 solution, which is 2.18-, 6.81-, and 9.98-fold higher than that of PtCo/C, PtSn/C, and Pt/C. More importantly, the catalytic activity attenuation for PtCo-PtSn/C is only 27.4% after 30 000 potential cycles, showing high stability. Furthermore, theoretical calculations reveal that the enhancement is attributed to charge transfer and the unique structure of PtCo-PtSn/C heterostructure, which regulate the d-band center of Pt and prevent non-noble metals from further dissolution. This work thus opens a way to design and prepare highly efficient Pt-based alloy catalysts for proton exchange membrane fuel cells.

引用

页数：8

共 61 条

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