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

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Abstract：

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　L12-Pt3Co　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　O2　on　L12-Pt3Co@Pt　without　creating　an　additional　energy　barrier　for　subsequent　oxygen-containing　intermediates　desorption.　Experimentally,　Al　single-atom　confined　in　the　L12-Pt3Co　lattice　by　substituting　partial　Co　occupancy,　imposing　tailored　∼　0.2　%　tension　on　Pt-skin　compared　to　the　L12-Pt3Co.　L12-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　L12-Al-Pt3Co@Pt/C　in　oxygen　reduction.　This　work　provides　an　avenue　to　design　the　strain　by　single-atom　for　sustainable　energy　conversion　technologies.　©　2024　Elsevier　B.V.

Keyword：

Atomic layer deposition Oxygen reduction reaction Pt-based intermetallic Single-atom Strain engineering

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[ 1 ] [Wu W.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
[ 2 ] [Qu W.]PEM Fuel Cell Catalyst Research and Development Center, Shenzhen Academy of Aerospace Technology, Shenzhen, 518057, China
[ 3 ] [Wang Z.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
[ 4 ] [Tan Y.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
[ 5 ] [Chen R.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
[ 6 ] [Chen S.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
[ 7 ] [Lv H.]PEM Fuel Cell Catalyst Research and Development Center, Shenzhen Academy of Aerospace Technology, Shenzhen, 518057, China
[ 8 ] [Zhong J.]Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, China
[ 9 ] [Cheng N.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China

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Source ：

Chemical Engineering Journal

ISSN： 1385-8947

Year： 2024

Volume： 491

1 3 . 4 0 0

JCR@2023

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SCOPUS Cited Count： 2

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 4

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