Promoting Subordinate, Efficient Ruthenium Sites with Interstitial Silicon for Pt‐Like Electrocatalytic Activity. (3rd July 2019)

• Record Type: Journal Article
• Authors: Chen, Hui; Ai, Xuan; Liu, Wang; Xie, Zhoubing; Feng, Weiqiang; Chen, Wei; Zou, Xiaoxin
• Is Part Of: Angewandte Chemie. Volume 131:Number 33(2019)
• Page Start: 11531
• Page End: 11535
• Publication Date: 2019-07-03
• Subjects: Bevorzugte katalytische Zentren -- Elektrokatalyse -- Elektronische Struktur -- Wasserstoffentwicklungsreaktion; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201906394
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The fundamental understanding and rational manipulation of catalytic site preference at extended solid surfaces is crucial in the search for advanced catalysts. Herein we find that the Ru top sites at metallic ruthenium surface have efficient Pt‐like activity for the hydrogen evolution reaction (HER), but they are subordinate to their adjacent, less active Ru3 ‐hollow sites due to the stronger hydrogen‐binding ability of the latter. We also present an interstitial incorporation strategy for the promotion of the Ru top sites from subordinate to dominant character, while maintaining Pt‐like catalytic activity. Our combined theoretical and experimental studies further identify intermetallic RuSi as a highly active, non‐Pt material for catalyzing the HER, because of its suitable electronic structure governed by a good balance of ligand and strain effects. Abstract : Skandal um RuSi : Die Bevorzugung katalytischer Zentren kann durch die gezielte Entwicklung fortschrittlicher Katalysatoren manipuliert werden. In Ru‐basierten Elektrokatalysatoren für die Wasserstoffentwicklungsreaktion wurde RuSi als Pt‐artiger Elektrokatalysator identifiziert. Die Zentren entstehen durch die Beförderung von Ru‐„top"‐Adsorptionsstellen, die effizient, aber untergeordnet auf der Ru(0001)‐Katalysatoroberfläche sind.