Exploring the Strain Effect in Single Particle Electrochemistry using Pd Nanocrystals

Tuning the surface strain of heterogeneous catalysts is recognized as a powerful strategy for tailoring their catalytic activity. However, a clear understanding of the strain effect in electrocatalysis at single‐particle resolution is still lacking. Here, we explore the electrochemical hydrogen evol...

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Published inAngewandte Chemie International Edition Vol. 62; no. 30; pp. e202304424 - n/a
Main Authors Zhao, Jiao, Wang, Menglin, Peng, Yu, Ni, Jie, Hu, Sunpei, Zeng, Jie, Chen, Qianjin
Format Journal Article
LanguageEnglish
Published Germany Wiley Subscription Services, Inc 24.07.2023
EditionInternational ed. in English
Subjects
Catalysts
Catalytic activity
Crystals
Electrocatalysis
Electrochemical cells
Electrochemistry
Hydrogen evolution reactions
Icosahedrons
Nanocrystals
Scanning Electrochemical Cell Microscopy
Single Nanocrystals
Strain
Tensile strain
Scanning Electrochemical Cell Microscopy
Electrocatalysis
Single Nanocrystals
Strain
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Summary:Tuning the surface strain of heterogeneous catalysts is recognized as a powerful strategy for tailoring their catalytic activity. However, a clear understanding of the strain effect in electrocatalysis at single‐particle resolution is still lacking. Here, we explore the electrochemical hydrogen evolution reaction (HER) of single Pd octahedra and icosahedra with the same surface bounded {111} crystal facet and similar sizes using scanning electrochemical cell microscopy (SECCM). It is revealed that tensilely strained Pd icosahedra display significantly superior HER electrocatalytic activity. The estimated turnover frequency at −0.87 V vs RHE on Pd icosahedra is about two times higher than that on Pd octahedra. Our single‐particle electrochemistry study using SECCM at Pd nanocrystals unambiguously highlights the importance of tensile strain on electrocatalytic activity and may offer new strategy for understanding the fundamental relationship between surface strain and reactivity. Scanning electrochemical cell microscopy enables the high throughput analysis of individual well‐shaped Pd nanocrystals to estimate the intrinsic hydrogen evolution reaction catalytic activity and reveal the structural origin of surface strain for the superior activity.
Bibliography:These authors contributed equally to this work.
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ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.202304424