Effective Nitrate Electroconversion to Ammonia Using an Entangled Co3O4/Graphene Nanoribbon Catalyst DOI Creative Commons
Marciélli K. R. Souza, Eduardo S. F. Cardoso, L.M.C. Pinto

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 17(1), P. 1295 - 1310

Published: Dec. 27, 2024

There has been huge interest among chemical scientists in the electrochemical reduction of nitrate (NO3-) to ammonia (NH4+) due useful application NH4+ nitrogen fertilizers and fuel. To conduct such a complex reaction, which involves eight electrons protons, one needs develop high-performance (and stable) electrocatalysts that favor formation reaction intermediates are selective toward production. In present study, we developed applied Co3O4/graphene nanoribbon (GNR) with excellent properties for effective NO3- NH4+, where yield rate 42.11 mg h-1 mgcat-1, FE 98.7%, conversion efficiency 14.71%, selectivity 100% were obtained, only 37.5 μg cm-2 catalysts (for best catalyst ─Co3O4(Cowt %55)GNR, 20.6 Co was applied), confirmed by loadings ranging from 19-150 cm-2. The highly satisfactory results obtained proposed favored high average values electrochemically active surface area (ECSA) low Rct values, along presence several planes Co3O4 entangled GNR occurrence kind "(Co3(Co(CN)6)2(H2O)12)1.333 complex" structure on surface, addition migration cell cathodic branch anodic branch, experiment conducted using H-cell separated Nafion 117 membrane. situ FTIR Raman spectroscopy helped identify adsorbed intermediates, namely, NO3-, NO2-, NO, NH2OH, final product compatible electroreduction mechanism. Density Functional Theory (DFT) calculations confirm Co3O4(Cowt %55)GNR exhibited better performance terms comparison %75), considering identified rate-determining step (RDS) observed transition *NO *NHO (0.43 eV).

Language: Английский

Fe3O4 Nanoparticles Anchored on Biomass Carbon as Electrocatalysts for Nitrate Reduction DOI
Jingwen Yu,

Yongchao Du,

Yaxi Li

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(24), P. 28693 - 28703

Published: Dec. 12, 2024

The electrocatalysis of nitrate to value-added ammonia is an important strategy address the increasingly pressing problem pollution. Nonetheless, this remains a challenging topic within field catalysis. Iron-based materials are considered promising catalysts for reduction NH3, but they prone agglomeration, with low yields and Faraday efficiencies. In study, Fe3O4 nanoparticles were anchored biomass carbon (BC) through in situ annealing strategy, which can utilize reducing properties BC convert Fe3+ ions. These findings indicate that by modulating temperature BC, ratio Fe2+ on catalyst surface be adjusted, thereby increasing active sites available promoting reduction. Transient photovoltage spectroscopy also indicated introduction contributed increase electron transfer rate. efficiency Fe3O4/BC-700 NH3 presence 100 mM NO3– at −0.5 V vs RHE was 91.10% (±2.36) yield rate 4274.25 (±110.09) mmol gcat–1 h–1. results pave way sustainable ammonium synthesis using low-cost environmentally friendly improved catalytic adjusting structure interface behavior.

Language: Английский

Citations

1
Cu3P/CoP Heterostructure for Efficient Electrosynthesis of Ammonia from Nitrate Reduction Reaction DOI
Pengfei Liu,

Xuetao Cheng,

Huilin Zhao

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Electrocatalytic nitrate reduction (ENO

Language: Английский

Citations

1
Study on the Effects of Fe Doping on C‐ZFe Catalyst for Catalytic Removal of NO from the Low‐Temperature Flue Gas DOI
Wan Lin Cao, Weijun Zhang, Ziyang Guo

et al.

ChemistrySelect, Journal Year: 2024, Volume and Issue: 9(27)

Published: July 15, 2024

Abstract The denitrification efficiency of carbon‐based zero valent iron catalyst (C‐ZFe) for low‐temperature selective catalytic reduction (SCR) (<140°C) highly depends on the structural species oxide (Fe x O y ) and physicochemical properties catalyst. In study, we investigated main factors affecting C‐ZFe such as temperature, content 2 . results showed that average NO X conversion was 72.6 % at 135°C when space velocity 459 h −1 mass ratio carbon to 15 85 %. surface morphology structure were characterized by area pore size distribution measurements, X‐ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR) photoelectron (XPS). indicated oxidized Fe 3 , which could retain then formed intermediate products. entered mesoporous along proceeded a reaction with adjacent carbon.

Language: Английский

Citations

0
Co-Carbonization of Straw and ZIF-67 to the Co/Biomass Carbon for Electrocatalytic Nitrate Reduction DOI Open Access
Jingwen Yu,

Yongchao Du,

Shuaiqi Liu

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 14(11), P. 817 - 817

Published: Nov. 13, 2024

Electrocatalytic nitrate reduction enables the recovery of from water under mild conditions and generates ammonia for nitrogen fertilizer feedstock in an economical green means. In this paper, Co/biomass carbon (Co/BC) composite catalysts were prepared by co-carbonization straw metal–organic framework material ZIF-67 electrocatalytic using hydrothermal annealing methods. The structure disperses catalyst components well provides a wider specific surface area, which is conducive to adsorption provision more reactive active sites. introduction biomass additionally enhances electrical conductivity facilitates electron transport. After electrochemical testing, Co/BC-100 exhibited best performance ammonia, with yield 3588.92 mmol gcat.−1 h−1 faradaic efficiency 97.01% at −0.5 V vs. RHE potential. This study promising approach construction other efficient cobalt-based electrocatalysts.

Language: Английский

Citations

0
A nanoflower-on-nanowire heterogeneous electrocatalyst for enhanced interfacial water activation in nitrate reduction reaction DOI
Jingwen Yu,

Yunliang Liu,

Cunhao Fan

et al.

Nano Research, Journal Year: 2024, Volume and Issue: 18(2), P. 94907135 - 94907135

Published: Dec. 16, 2024

Language: Английский

Citations

0
Amorphous Fe-doped TiO2 nanosheet arrays: A catalyst for efficient nitrate reduction to ammonia DOI

Jiuqing Xiong,

Yifan Wang, Jingjing Wu

et al.

Journal of Electroanalytical Chemistry, Journal Year: 2024, Volume and Issue: 978, P. 118909 - 118909

Published: Dec. 28, 2024

Language: Английский

Citations

0
Effective Nitrate Electroconversion to Ammonia Using an Entangled Co3O4/Graphene Nanoribbon Catalyst DOI Creative Commons
Marciélli K. R. Souza, Eduardo S. F. Cardoso, L.M.C. Pinto

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 17(1), P. 1295 - 1310

Published: Dec. 27, 2024

There has been huge interest among chemical scientists in the electrochemical reduction of nitrate (NO3-) to ammonia (NH4+) due useful application NH4+ nitrogen fertilizers and fuel. To conduct such a complex reaction, which involves eight electrons protons, one needs develop high-performance (and stable) electrocatalysts that favor formation reaction intermediates are selective toward production. In present study, we developed applied Co3O4/graphene nanoribbon (GNR) with excellent properties for effective NO3- NH4+, where yield rate 42.11 mg h-1 mgcat-1, FE 98.7%, conversion efficiency 14.71%, selectivity 100% were obtained, only 37.5 μg cm-2 catalysts (for best catalyst ─Co3O4(Cowt %55)GNR, 20.6 Co was applied), confirmed by loadings ranging from 19-150 cm-2. The highly satisfactory results obtained proposed favored high average values electrochemically active surface area (ECSA) low Rct values, along presence several planes Co3O4 entangled GNR occurrence kind "(Co3(Co(CN)6)2(H2O)12)1.333 complex" structure on surface, addition migration cell cathodic branch anodic branch, experiment conducted using H-cell separated Nafion 117 membrane. situ FTIR Raman spectroscopy helped identify adsorbed intermediates, namely, NO3-, NO2-, NO, NH2OH, final product compatible electroreduction mechanism. Density Functional Theory (DFT) calculations confirm Co3O4(Cowt %55)GNR exhibited better performance terms comparison %75), considering identified rate-determining step (RDS) observed transition *NO *NHO (0.43 eV).

Language: Английский

Citations

0