Finding the Most Catalytically Active Platinum Clusters With Low Atomicity

On a subnanometer scale, an only one‐atom difference in a metal cluster may cause significant transitions in the catalytic activity due to the electronic and geometric configurations. We now report the atomicity‐specific catalytic activity of platinum clusters with significantly small atomicity, esp...

Full description

Saved in:
Bibliographic Details
Published in:Angewandte Chemie 2015-08, Vol.127 (34), p.9948-9953
Main Authors: Imaoka, Takane, Kitazawa, Hirokazu, Chun, Wang-Jae, Yamamoto, Kimihisa
Format: Article
Language:eng ; ger
Subjects:
Alloys
Atomic structure
Catalysis
Catalytic activity
Chemistry
Clusters
Clusterverbindungen
Dendrimere
Electronics
Katalysatoren
Metal clusters
Nanocrystals
Platin
Platinum
Sauerstoffreduktionsreaktion
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:On a subnanometer scale, an only one‐atom difference in a metal cluster may cause significant transitions in the catalytic activity due to the electronic and geometric configurations. We now report the atomicity‐specific catalytic activity of platinum clusters with significantly small atomicity, especially below 20. The atomic coordination structure is completely different from that of the larger face‐centered cubic (fcc) nanocrystals. Here, an electrochemical study on such small clusters, in which the atomicity ranged between 12 and 20, revealed Pt19 as the most catalytically active species. In combination with a theoretical study, a common structure that leads to a high catalytic performance is proposed. Die Clustergröße zählt: Die katalytische Aktivität von Platin‐Clustern mit einer kleinen, aber präzisen Zahl an Atomen zeigt einen deutlich anderen Trend als bei größeren kubisch‐flächenzentrierten (fcc) Nanokristallen. Unter den verschiedenen Clustern erweist sich Pt19 als katalytisch am aktivsten. Seine Struktur unterscheidet sich deutlich von denen der größeren Cluster.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201504473