Isolated Rhodium Atoms Activate Porous TiO2 for Enhanced Electrocatalytic Conversion of Nitrate to Ammonia DOI Creative Commons
Zhi Liang Zhao,

Shaoxuan Yang,

Shensong Wang

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 12(2)

Published: Nov. 18, 2024

Abstract The direct electrochemical reduction of nitrate to ammonia is an efficient and environmentally friendly technology, however, developing electrocatalysts with high activity selectivity remains a great challenge. Single‐atom catalysts demonstrate unique properties exceptional performance across range catalytic reactions, especially those that encompass multi‐step processes. Herein, straightforward cost‐effective approach introduced for synthesizing single‐atom dispersed Rh on porous TiO 2 spheres (Rh 1 ‐TiO ), which functions as electrocatalyst the electroreduction NO 3 − NH . synthesized catalyst achieve maximum Faradaic efficiency (FE) 94.7% yield rate 29.98 mg h −1 cat at −0.5 V versus RHE in 0.1 M KOH+0.1 KNO electrolyte, significantly outperforming not only undoped but also Ru, Pd, Ir doped titania catalysts. Density functional theory calculations reveal incorporation single atom enhances charge transfer between adsorbed active site. atoms serve highly site reaction (NO RR), activates adjacent Ti sites through optimizating electronic structure, thereby reducing energy barrier rate‐limiting step. Consequently, this results substantial enhancement RR performance. Furthermore, synthetic method has potential be extended other scaled up commercial applications.

Language: Английский

Cobalt Nanoparticles Encapsulated in N-Doped Carbon Nanotubes Assembled on Carbon Cloth for Efficient Electroreduction of Nitrite to Ammonia DOI
Ye Li, Xuping Sun, Huiyong Wang

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 24, 2025

Electrochemical nitrite (NO2–) reduction provides an alternative pathway for both sustainable ammonia (NH3) synthesis and reutilization of NO2– pollutants, but this process requires high activity selective catalysts. In work, cobalt nanoparticles encapsulated in N-doped carbon nanotubes supported on cloth (Co@NCNT/CC) as a low-cost electrocatalyst can efficiently catalyze NO2–-to-NH3 conversion. Such Co@NCNT/CC shows exceptional electrocatalytic performance, achieving maximum NH3 Faradaic efficiency 94.9% with yield 365.1 μmol h–1 cm–2 at −0.3 V. Remarkably, the assembled Zn–NO2– battery cathode exhibits peak power density 4.4 mW satisfactory 141.5 cm–2.

Language: Английский

Citations

0
Modifying Microenvironment in Van der Waals Gap by Cu/N Co‐Doping Strategy for Highly Efficient Nitrite Reduction to Ammonia DOI Creative Commons

Heen Li,

Yuanzhe Wang,

Kuo Wei

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Abstract Electroreduction of nitrite to ammonia has significant promise for economical NH 3 electrosynthesis and wastewater treatment. Herein, sulfur vacancies rich Cu─N co‐doped SnS 2 nanosheet is designed as a highly active durable NO RR catalyst. Benefiting from the strategy, Cu/N‐SnS 2‐x achieves highest yield rate 18.15mg h −1 mg cat at −0.935 V (vs RHE) excellent Faradaic Efficiency 95.73% −0.835 RHE). In situ FT‐IR in XPS proves that greater capacity atomic hydrogen generation, which facilitates conversion maintains structural stability during process. Theoretical calculations reveal introduced effectively expose metal atoms inside make them adsorb efficiently, accelerates transformation ammonia. Besides, Cu N can form new electronic structure, induces an electron‐deficient state promotes adsorption reaction intermediates on Cu, reduces energy barrier reduction surface. The current exploration presents fresh prospects rational development effective electrocatalyst synthesizing nitrite.

Language: Английский

Citations

0
Effective collective value-added recycling of nitrate and sulfion in wastewater via synergistic electrocatalysis of dual-active sites on copper-cobalt oxides DOI
Donglin Zhao, Song Wu, Yihan Zhang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163044 - 163044

Published: April 1, 2025

Language: Английский

Citations

0
Isolated Rhodium Atoms Activate Porous TiO2 for Enhanced Electrocatalytic Conversion of Nitrate to Ammonia DOI Creative Commons
Zhi Liang Zhao,

Shaoxuan Yang,

Shensong Wang

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 12(2)

Published: Nov. 18, 2024

Abstract The direct electrochemical reduction of nitrate to ammonia is an efficient and environmentally friendly technology, however, developing electrocatalysts with high activity selectivity remains a great challenge. Single‐atom catalysts demonstrate unique properties exceptional performance across range catalytic reactions, especially those that encompass multi‐step processes. Herein, straightforward cost‐effective approach introduced for synthesizing single‐atom dispersed Rh on porous TiO 2 spheres (Rh 1 ‐TiO ), which functions as electrocatalyst the electroreduction NO 3 − NH . synthesized catalyst achieve maximum Faradaic efficiency (FE) 94.7% yield rate 29.98 mg h −1 cat at −0.5 V versus RHE in 0.1 M KOH+0.1 KNO electrolyte, significantly outperforming not only undoped but also Ru, Pd, Ir doped titania catalysts. Density functional theory calculations reveal incorporation single atom enhances charge transfer between adsorbed active site. atoms serve highly site reaction (NO RR), activates adjacent Ti sites through optimizating electronic structure, thereby reducing energy barrier rate‐limiting step. Consequently, this results substantial enhancement RR performance. Furthermore, synthetic method has potential be extended other scaled up commercial applications.

Language: Английский

Citations

2