Hollow Cu2O@CoMn2O4 Nanoreactors for Electrochemical NO Reduction to NH3: Elucidating the Void‐Confinement Effects on Intermediates. (7th August 2022)

• Record Type: Journal Article
• Authors: Bai, Chunpeng; Fan, Shiying; Li, Xinyong; Niu, Zhaodong; Wang, Jing; Liu, Zhiyuan; Zhang, Dongke
• Is Part Of: Advanced functional materials. Volume 32:Number 41(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-08-07
• Subjects: ammonia production -- electrochemical nitric oxide reduction -- hollow nanoreactors -- intermediates -- Void‐confinement; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202205569
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Hollow nanoreactors show great potential in catalysis due to the void‐confinement effect. Yet few studies have investigated the void‐confinement effect of hollow nanoreactors on intermediates. Herein, electrochemical NO reduction to NH3 (ENOR) is used as a probe reaction to study the void‐confinement effect of hollow Cu2 O@CoMn2 O4 nanoreactors on intermediates. Combined with the results of catalytic activity, H2 ‐treated in situ diffusion Fourier transform infrared spectroscopy and the finite‐element method simulation confirm that the void‐confinement effect on the intermediate is the main reason for enhanced ENOR efficiency. Additionally, theoretical calculations also show that the Cu sites of Cu2 O@CoMn2 O4 nanoreactors are favorable for the formation of *NOH intermediates. This work not only gives an insight into void‐confinement effect of hollow nanoreactors on intermediates but also provides a valuable strategy for improving ENOR. Abstract : Hollow Cu2 O@CoMn2 O4 nanoreactors with different structures are prepared for investigating the void‐confinement effect on intermediates during electrochemical NO reduction to NH3, and demonstrate a remarkable NH3 yield of 94.18 mmol g −1 h −1 and a Faraday efficiency of 75.05%. This work gives an insight into the void‐confinement effect of hollow nanoreactors on intermediates, and provides a valuable strategy for electrochemical ammonia production.