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Controllable selective anchoring of subnanometric Ru clusters or single-atoms/clusters on tungsten nitride for the hydrogen oxidation

The impregnation method in the preparation of metal cluster catalysts typically inadvertently introduces single atoms (SAs) into the substrate. However, the question of whether the introduction of SAs will further improve the catalytic activity of cluster systems for specific reactions such as the h...

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Published in:Science China. Chemistry 2024-11, Vol.67 (11), p.3749-3756
Main Authors: Sun, Qijiao, Wu, Chuanqiang, Sun, Yiqiang, Shen, Yuan, Zhao, Lei, Yang, Xiaodong, Yang, Li, Lin, Yunxiang, Mao, Keke, Xu, Kun
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container_issue 11
container_start_page 3749
container_title Science China. Chemistry
container_volume 67
creator Sun, Qijiao
Wu, Chuanqiang
Sun, Yiqiang
Shen, Yuan
Zhao, Lei
Yang, Xiaodong
Yang, Li
Lin, Yunxiang
Mao, Keke
Xu, Kun
description The impregnation method in the preparation of metal cluster catalysts typically inadvertently introduces single atoms (SAs) into the substrate. However, the question of whether the introduction of SAs will further improve the catalytic activity of cluster systems for specific reactions such as the hydrogen oxidation reaction (HOR) remains unraveled. Herein, we demonstrate Ru clusters anchored on WN nanowires (Ru C /WN) show a higher alkaline HOR catalytic activity in comparison with Ru SAs and nanoclusters (NCs)-coupled catalyst anchored on WN nanowires system (Ru C,S /WN). Notably, the Ru C /WN exhibits superb intrinsic catalytic activity with a mass-normalized exchange current density of 890 mA mg −1 PGM , which is among the top level of well developed Ru-based HOR catalysts. Both theoretical simulation and experimental investigation suggest that Ru C /WN owns an optimized H * and OH * reaction intermediates for the alkaline HOR, therefore resulting in the excellent intrinsic HOR catalytic performance.
doi_str_mv 10.1007/s11426-024-2068-1
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subjects Annealing
Catalysts
Catalytic activity
Chemical engineering
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Controllability
Electrons
Energy
Fuel cells
Hydrogen
Laboratories
Metal clusters
Microscopy
Morphology
Nanoclusters
Nanowires
Oxidation
Reaction intermediates
Temperature
title Controllable selective anchoring of subnanometric Ru clusters or single-atoms/clusters on tungsten nitride for the hydrogen oxidation
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