Recent advances in nanostructured heterogeneous catalysts for N-cycle electrocatalysis

Deleted Journal, Journal Year: 2022, Volume and Issue: 1, P. e9120010 - e9120010

Published: May 30, 2022

To restore the natural nitrogen cycle (N-cycle), artificial N-cycle electrocatalysis with flexibility, sustainability, and compatibility can convert intermittent renewable energy (e.g., wind) to harmful or value-added chemicals minimal carbon emissions. The background of such N-cycles, as fixation, ammonia oxidation, nitrate reduction, is briefly introduced here. discussion emerging nanostructures in various conversion reactions focused on architecture/compositional design, electrochemical performances, reaction mechanisms, instructive tests. Energy device advancements for achieving more functions well in situ/operando characterizations toward understanding key steps are also highlighted. Furthermore, some recently proposed less discussed C–N coupling summarized. We classify inorganic sources that each other under an applied voltage into three types, namely, abundant nitrogen, toxic (nitrite), oxides, useful compounds ammonia, hydrazine, hydroxylamine, goal providing critical insights strategies facilitate development our circular economy.

Language: Английский

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Electrochemical Nitrate Reduction: Ammonia Synthesis and the Beyond

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(17)

Published: June 9, 2023

Natural nitrogen cycle has been severely disrupted by anthropogenic activities. The overuse of N-containing fertilizers induces the increase nitrate level in surface and ground waters, substantial emission oxides causes heavy air pollution. Nitrogen gas, as main component air, used for mass ammonia production over a century, providing enough nutrition agriculture to support world population increase. In last decade, researchers have made great efforts develop processes under ambient conditions combat intensive energy consumption high carbon associated with Haber-Bosch process. Among different techniques, electrochemical reduction reaction (NO

Language: Английский

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Recent advances in electrocatalytic ammonia synthesis

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2023, Volume and Issue: 50, P. 6 - 44

Published: July 1, 2023

Language: Английский

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V-doped TiO2 nanobelt array for high-efficiency electrocatalytic nitrite reduction to ammonia

Materials Today Physics, Journal Year: 2022, Volume and Issue: 30, P. 100944 - 100944

Published: Dec. 5, 2022

Language: Английский

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Ampere-Level Nitrate Electroreduction to Ammonia over Monodispersed Bi-Doped FeS₂

ACS Nano, Journal Year: 2023, Volume and Issue: 17(21), P. 21328 - 21336

Published: Oct. 23, 2023

Electrochemical conversion of NO3– into NH3 (NO3RR) holds an enormous prospect to simultaneously yield valuable and alleviate pollution. Herein, we report monodispersed Bi-doped FeS2 (Bi–FeS2) as a highly effective NO3RR catalyst. Atomic coordination characterizations Bi–FeS2 disclose that the isolated Bi dopant coordinates with its adjacent Fe atom create unconventional p–d hybridized Bi–Fe dinuclear sites. Operando spectroscopic measurements combined theoretical calculations sites can synergistically enhance hydrogenation energetics NO3–-to-NH3 pathway, while suppressing competitive hydrogen evolution, leading high selectivity activity. Consequently, specially designed flow cell equipped exhibits rate 83.7 mg h–1 cm–2 near-100% Faradaic efficiency at ampere-level current density 1023.2 mA cm–2, together excellent long-term stability for 100 h electrolysis, ranking almost highest performance among all reported catalysts.

Language: Английский

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Ambient Electroreduction of Nitrite to Ammonia over Ni Nanoparticle Supported on Molasses-Derived Carbon Sheets

ACS Applied Nano Materials, Journal Year: 2022, Volume and Issue: 5(10), P. 14246 - 14250

Published: Oct. 5, 2022

Electrochemical nitrite (NO2–) reduction is a promising approach for ambient ammonia (NH3) synthesis and simultaneous mitigation of NO2– contaminant in wastewater. Herein, we report Ni nanoparticle supported on molasses-derived carbon sheets (Ni@MDC) as an earth-abundant electrocatalyst NO2–-to-NH3 conversion. When tested alkaline solutions with 0.1 M NO2–, such Ni@MDC obtains high NH3 yield 6.3 mg h–1 mgcat–1 Faradaic efficiency 65.4% at −0.8 V versus reversible hydrogen electrode under conditions. Furthermore, it shows remarkable electrochemical stability during long-term electrolysis cycling tests.

Language: Английский

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Recent Advance in Heterogenous Electrocatalysts for Highly Selective Nitrite Reduction to Ammonia Under Ambient Condition

Small Structures, Journal Year: 2023, Volume and Issue: 4(11)

Published: July 23, 2023

Industrial ammonia production mainly relies on the conventional Haber–Bosch process accompanied by high energy consumption and plentiful carbon dioxide emissions, which triggered recent interest to explore more energy‐efficient environmentally benign alternatives. Very recently, electrochemical nitrite reduction in an aqueous medium promises new opportunities for advanced, energy‐efficient, sustainable at ambient conditions. The formation rate Faradic efficiency are strongly associated with adopted electrocatalysts; therefore, striving high‐efficient electrocatalysts is key via reaction. Herein, a critical overview of advances reaction presented, highlighting latest innovative heterogenous including noble metal catalysts, transition‐metal‐based their compounds. Meanwhile, possible pathway electroreduction ammonia, detection, catalytic activity descriptor briefly summarized. Finally, perspective research challenges that convert outlined, increasing contributions route realizing neutral footprint.

Language: Английский

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Tandem Electrocatalytic Reduction of Nitrite to Ammonia on Rhodium–Copper Single Atom Alloys

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(36)

Published: April 23, 2024

Abstract Electrocatalytic reduction of NO 2 − to NH 3 (NO RR) presents a fascinating approach for simultaneously migrating pollutants and producing valuable . In this study, single‐atom Rh‐alloyed copper (CuRh 1 ) is explored as highly active selective catalyst toward the RR. Combined theoretical calculations in situ FTIR/EPR spectroscopic experiments uncover synergistic effect Rh Cu promote RR energetics CuRh through tandem catalysis pathway, which activates preliminary adsorption hydrogenation → *NO *NOOH *NO), while generated on then transferred substrate promotes rate‐determining step *NHO synthesis. As result, equipped flow cell an unprecedented yield rate 2191.6 µmol h −1 cm −2 ‐Faradaic efficiency 98.9% at high current density 322.5 mA , well long‐term stability 100 electrolysis.

Language: Английский

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Recent Advances in Electrocatalytic Nitrate Reduction to Ammonia: Mechanism Insight and Catalyst Design

ACS Sustainable Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 11(21), P. 7965 - 7985

Published: May 16, 2023

Excessive discharge of nitrate pollutants has caused an imbalance in the nitrogen cycle, which threatened human health and ecosystems. Clean electrocatalytic reduction technology can convert into high value-added ammonia to control water pollution, truly realizing "turning waste treasure". This review highlights latest mechanisms proposed by combining situ characterization discusses various intermediates produced during reaction process key steps that determine rate. Meanwhile, four common catalyst synthesis strategies are systematically summarized. These have exhibited preeminent results terms conductivity active sites inhibition side effects. Finally, challenges difficulty (NRA) development main direction future discussed. The engineering for increasing stability performance also aims provide guidance efficient conversion promotes advancement sustainable chemistry.

Language: Английский

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High-efficiency electrosynthesis of ammonia with selective reduction of nitrite over an Ag nanoparticle-decorated TiO₂ nanoribbon array

Inorganic Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 10(5), P. 1431 - 1435

Published: Jan. 1, 2023

An Ag nanoparticle-decorated TiO 2 nanoribbon array on a titanium plate performs efficiently in electrocatalytic NO − reduction to NH 3 , achieving large yield of 8743.1 μg h −1 cm −2 with high faradaic efficiency 96.4%.

Language: Английский

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