Assembling lanthanide–transition metal clusters on TiO2 for photocatalytic nitrogen fixation

Ammonia synthesis using light with low energy consumption offers an effective solution for energy saving and environmental protection. Herein, an abundant oxygen vacancy photocatalyst was synthesized via the integration of lanthanide–transition metal (4f–3d) clusters Ln52Ni56 on the TiO2 surface. Th...

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Published in:Inorganic chemistry frontiers 2022-06, Vol.9 (12), p.2862-2868
Main Authors: Chao-Long, Chen, Hai-Ying, Wang, Jun-Ping, Li, La-Sheng, Long, Xiang-Jian Kong, Lan-Sun, Zheng
Format: Article
Language:English
Subjects:
Ammonia
Catalysts
Electron paramagnetic resonance
Energy consumption
Environmental protection
Inorganic chemistry
Metal clusters
Nitrogenation
Oxygen enrichment
Photocatalysis
Titanium dioxide
Transition metals
Vacancies
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container_issue 12
container_start_page 2862
container_title Inorganic chemistry frontiers
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creator Chao-Long, Chen
Hai-Ying, Wang
Jun-Ping, Li
La-Sheng, Long
Xiang-Jian Kong
Lan-Sun, Zheng
description Ammonia synthesis using light with low energy consumption offers an effective solution for energy saving and environmental protection. Herein, an abundant oxygen vacancy photocatalyst was synthesized via the integration of lanthanide–transition metal (4f–3d) clusters Ln52Ni56 on the TiO2 surface. The investigation of photocatalytic nitrogen fixation showed that Ln52Ni56 not only acts as a tool to improve charge separation but also enriches oxygen vacancies. Multiple synergies resulted in a photocatalytic nitrogen fixation efficiency of up to 800 μmol h−1 g−1 with the direct utilization of nitrogen and water without any sacrificial agents or co-catalysts. Electron paramagnetic resonance spectroscopy was conducted to investigate the mechanism of oxygen vacancy inactivation and recovery. This study provides a reference for the construction of a photochemical nitrogen fixation catalyst driven by defect engineering.
doi_str_mv 10.1039/d2qi00628f
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subjects Ammonia
Catalysts
Electron paramagnetic resonance
Energy consumption
Environmental protection
Inorganic chemistry
Metal clusters
Nitrogenation
Oxygen enrichment
Photocatalysis
Titanium dioxide
Transition metals
Vacancies
title Assembling lanthanide–transition metal clusters on TiO2 for photocatalytic nitrogen fixation
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