Facet-Orientated Pd Core Impels Quasi-Monolayer Pt Shell To Boost the Oxygen-Reduction Electrocatalysis

被引：8

作者：

Dong, Yan ^{[1
]}

Liu, Yang ^{[1
]}

He, Yuanyuan ^{[1
]}

Chen, Zhuoyao ^{[1
]}

Chen, Jing ^{[1
]}

Orikasa, Yuki ^{[2
]}

Uchimoto, Yoshiharu ^{[3
]}

Wang, Xiaoming ^{[1
]}

机构：

[1] Shantou Univ, Coll Chem & Chem Engn, Key Lab Preparat & Applicat Ordered Struct Mat Gua, Shantou 515063, Peoples R China

[2] Ritsumeikan Univ, Coll Life Sci, Kusatsu, Shiga 5258577, Japan

[3] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2023年 / 11卷 / 26期

关键词：

Oxygen reduction; Core-shell nanoparticles; Pd core; Quasi-monolayer Pt shell; Facet orientation; Cyclic voltammetry; O-2; REDUCTION; MONO LAYER; NANOPARTICLES; STRAIN;

D O I：

10.1021/acssuschemeng.3c02141

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

CV treatment can induce (111)-facet-orientatedPd(c), on which Pt-qms will achieve efficient useof every Ptatom for fuel cells. Pd core (Pd-c) supportedquasi-monolayer Pt shell (Pt-qms) can efficiently utilizenoble-metal Pt in the electrocatalyticoxygen-reduction reaction (ORR). Here, we report that the facet orientationof Pd-c is tuned for impelling Pt-qms to boostthe ORR electrocatalysis. Facet-orientated Pd-c is achievedby the cyclic-voltammetry treatment, which restructures Pd-c to form the typical (111)-facet exposure. The (111)-facet-orientatedPd(c) induces the moderately compressed Pt-qms,exhibiting over 4-fold specific activity and near 9-fold mass activityin the ORR than commercial carbon-supported Pt nanoparticles (TKK,2.1 nm). The volcano-type relationship between the Pt-Pt bonddistance and ORR activity of Pt-qms demonstrates the straincontrol of electrocatalytic activity and also predicts the optimalstrain of 2.695 & ANGS;. These findings pave the way for developinghighly efficient PdcPtqms ORR electrocatalysts.

引用

页码：9523 / 9527

页数：5

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