Graphene Oxide-Anchored Cu–Co Catalysts for Efficient Electrochemical Nitrate Reduction DOI Open Access

Haosheng Lan,

Yi Zhang,

Le Ding

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(11), P. 2495 - 2495

Published: May 26, 2025

Electrocatalytic nitrate reduction to ammonia (ENRA) presents a promising strategy for simultaneous environmental remediation and sustainable synthesis. In this work, Cu–Co bimetallic catalyst supported on functionalized reduced graphene oxide (RGO) was systematically designed achieve efficient selective production. Surface oxygen functional groups (GO) were optimized through alkaline hydrothermal treatments, enhancing the anchoring capacity metal active sites. Characterization indicated successful formation of uniform heterointerfaces comprising metallic phases, which significantly improved stability performance. Among studied compositions, Cu6Co4/RGO exhibited superior catalytic activity, achieving remarkable selectivity 99.86% Faradaic efficiency 96.54% at −0.6 V (vs. RHE). Long-term electrocatalysis demonstrated excellent durability, with over 90% maintained production after 20 h operation. situ FTIR analysis revealed that introducing Co effectively promoted water dissociation, facilitating hydrogen generation (*H) accelerating transformation intermediates. This work offers valuable mechanistic insights paves way design highly electrocatalysts electrosynthesis.

Language: Английский

Synthesis of Hydroxylamine via Ketone-Mediated Nitrate Electroreduction DOI
Shunhan Jia, Limin Wu,

Xingxing Tan

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(15), P. 10934 - 10942

Published: April 6, 2024

Hydroxylamine (HA, NH2OH) is a critical feedstock in the production of various chemicals and materials, its efficient sustainable synthesis great importance. Electroreduction nitrate on Cu-based catalysts has emerged as promising approach for green ammonia (NH3) production, but electrosynthesis HA remains challenging due to overreduction NH3. Herein, we report first work ketone-mediated using water. A metal–organic-framework-derived Cu catalyst was developed catalyze reaction. Cyclopentanone (CP) used capture situ form CP oxime (CP-O) with C═N bonds, which prone hydrolysis. could be released easily after electrolysis, regenerated. It demonstrated that CP-O formed an excellent Faradaic efficiency 47.8%, corresponding formation rate 34.9 mg h–1 cm–2, remarkable carbon selectivity >99.9%. The hydrolysis release regeneration also optimized, resulting 96.1 mmol L–1 stabilized solution, significantly higher than direct reduction. Detailed characterizations, control experiments, theoretical calculations revealed surface reconstruction reaction mechanism, showed coexistence Cu0 Cu+ facilitated protonation reduction *NO2 *NH2OH desorption, leading enhancement production.

Language: Английский

Citations

25
CO2/NOx-involved Electrochemical C-N Coupling Reactions DOI

Xiqing Sui,

Limin Wu, Shunhan Jia

et al.

Chemical Research in Chinese Universities, Journal Year: 2024, Volume and Issue: 40(5), P. 764 - 775

Published: June 18, 2024

Language: Английский

Citations

3
In-situ reconstruction to regulate electronic state for dilute nitrate electroreduction DOI

Yaohua Hong,

Yishan Xu,

Jiayu Zhan

et al.

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132609 - 132609

Published: March 1, 2025

Citations

0
Graphene Oxide-Anchored Cu–Co Catalysts for Efficient Electrochemical Nitrate Reduction DOI Open Access

Haosheng Lan,

Yi Zhang,

Le Ding

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(11), P. 2495 - 2495

Published: May 26, 2025

Electrocatalytic nitrate reduction to ammonia (ENRA) presents a promising strategy for simultaneous environmental remediation and sustainable synthesis. In this work, Cu–Co bimetallic catalyst supported on functionalized reduced graphene oxide (RGO) was systematically designed achieve efficient selective production. Surface oxygen functional groups (GO) were optimized through alkaline hydrothermal treatments, enhancing the anchoring capacity metal active sites. Characterization indicated successful formation of uniform heterointerfaces comprising metallic phases, which significantly improved stability performance. Among studied compositions, Cu6Co4/RGO exhibited superior catalytic activity, achieving remarkable selectivity 99.86% Faradaic efficiency 96.54% at −0.6 V (vs. RHE). Long-term electrocatalysis demonstrated excellent durability, with over 90% maintained production after 20 h operation. situ FTIR analysis revealed that introducing Co effectively promoted water dissociation, facilitating hydrogen generation (*H) accelerating transformation intermediates. This work offers valuable mechanistic insights paves way design highly electrocatalysts electrosynthesis.

Language: Английский

Citations

0