Single-atom Al precisely modulate the strain of Pt3Co intermetallic for superior oxygen catalytic performance

被引：11

作者：

Wu, Wei ^{[1
]}

Qu, Wei ^{[2
]}

Wang, Zichen ^{[1
]}

Tan, Yangyang ^{[1
]}

Chen, Runzhe ^{[1
]}

Chen, Suhao ^{[1
]}

Lv, Haifeng ^{[2
]}

Zhong, Jun ^{[3
]}

Cheng, Niancai ^{[1
]}

机构：

[1] Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China

[2] Shenzhen Acad Aerosp Technol, PEM Fuel Cell Catalyst Res & Dev Ctr, Shenzhen 518057, Peoples R China

[3] Soochow Univ, Inst Funct Nano & Soft Mat Lab FUNSOM, Jiangsu Key Lab Adv Negat Carbon Technol, Suzhou 215123, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 491卷

基金：

中国国家自然科学基金;

关键词：

Single-atom; Strain engineering; Pt-based intermetallic; Oxygen reduction reaction; Atomic layer deposition; TOTAL-ENERGY CALCULATIONS; TRANSITION-METALS; REDUCTION; NANOPARTICLES; PLATINUM; ELECTROCATALYSTS; SHELL;

D O I：

10.1016/j.cej.2024.151987

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Precisely controlling the strain of Pt-based intermetallic to ensure high performance and stability is a massive task for sustainable proton-exchange-membrane-fuel-cells. Herein, the Al single-atom was trapped into the L1(2)Pt(3)Co intermetallic core to precisely tailor the strain state on the Pt-skin for fast oxygen reduction reaction kinetics. Theoretical calculations firstly predicted that only tailored tension can accelerate the protonation of O-2 on L1(2)-Pt3Co@Pt without creating an additional energy barrier for subsequent oxygen-containing intermediates desorption. Experimentally, Al single-atom confined in the L1(2)-Pt3Co lattice by substituting partial Co occupancy, imposing tailored similar to 0.2 % tension on Pt-skin compared to the L1(2-)Pt(3)Co. L1(2)-Al-Pt3Co@Pt/C exhibits enhanced mass activity which is ten-time improvement over commercial Pt/C. More significantly, XAS and DFT results reveal that the Al single-atom can strengthen the Pt-Co bonding, enhancing the stability of L1(2)-AlPt3Co@Pt/C in oxygen reduction. This work provides an avenue to design the strain by single-atom for sustainable energy conversion technologies.

引用

页数：11

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