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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The reformation of catalyst: From a trial-and-error synthesis to rational design

Nano Research, Journal Year: 2023, Volume and Issue: 17(4), P. 3261 - 3301

Published: Sept. 27, 2023

Language: Английский

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Nanoscale Metal Particle Modified Single‐Atom Catalyst: Synthesis, Characterization, and Application

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(2)

Published: July 13, 2023

Single-atom catalysts (SACs) have attracted considerable attention in heterogeneous catalysis because of their well-defined active sites, maximum atomic utilization efficiency, and unique unsaturated coordinated structures. However, effectiveness is limited to reactions requiring sites containing multiple metal atoms. Furthermore, the loading amounts single-atom must be restricted prevent aggregation, which can adversely affect catalytic performance despite high activity individual The introduction nanoscale particles (NMPs) into SACs (NMP-SACs) has proven an efficient approach for improving performance. A comprehensive review urgently needed systematically introduce synthesis, characterization, application NMP-SACs mechanisms behind superior This first presents classifies different through NMPs enhance SACs. It then summarizes currently reported synthetic strategies state-of-the-art characterization techniques NMP-SACs. Moreover, electro/thermo/photocatalysis, reasons are discussed. Finally, challenges perspectives future design advanced addressed.

Language: Английский

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Urea catalytic oxidation for energy and environmental applications

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(3), P. 1552 - 1591

Published: Jan. 1, 2024

This review evaluates state-of-the-art advances in electrocatalytic and photo(electro)catalytic urea oxidation from fundamentals materials to energy environmental applications.

Language: Английский

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Ir-Sn pair-site triggers key oxygen radical intermediate for efficient acidic water oxidation

Science Advances, Journal Year: 2023, Volume and Issue: 9(42)

Published: Oct. 18, 2023

The anode corrosion induced by the harsh acidic and oxidative environment greatly restricts lifespan of catalysts. Here, we propose an antioxidation strategy to mitigate Ir dissolution triggering strong electronic interaction via elaborately constructing a heterostructured Ir-Sn pair-site catalyst. formation dual-site at heterointerface resulting interactions considerably reduce d-band holes species during both synthesis oxygen evolution reaction processes suppress their overoxidation, enabling catalyst with substantially boosted resistance. Consequently, optimized exhibits high mass activity 4.4 A mgIr-1 overpotential 320 mV outstanding long-term stability. proton-exchange-membrane water electrolyzer using this delivers current density 2 cm-2 1.711 V low degradation in accelerated aging test. Theoretical calculations unravel that radicals π* between 5d-O 2p might be responsible for durability.

Language: Английский

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Selective CO₂ Reduction to Ethylene Mediated by Adaptive Small‐molecule Engineering of Copper‐based Electrocatalysts

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(50)

Published: Oct. 30, 2023

Electrochemical CO2 reduction reaction (CO2 RR) over Cu catalysts exhibits enormous potential for efficiently converting to ethylene (C2 H4 ). However, achieving high C2 selectivity remains a considerable challenge due the propensity of undergo structural reconstruction during RR. Herein, we report an in situ molecule modification strategy that involves tannic acid (TA) molecules adaptive regulating Cu-based material pathway facilitates products. An excellent Faraday efficiency (FE) 63.6 % on with current density 497.2 mA cm-2 flow cell was achieved, about 6.5 times higher than pristine catalyst which mainly produce CH4 . The X-ray absorption spectroscopy and Raman studies reveal hydroxyl group TA stabilizes Cuδ+ Furthermore, theoretical calculations demonstrate /Cu0 interfaces lower activation energy barrier *CO dimerization, species stabilize *COH intermediate via hydrogen bonding, thereby promoting production. Such engineering modulated electronic structure provides promising achieve highly selective value-added chemicals.

Language: Английский

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Dual Atom Catalysts for Energy and Environmental Applications

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(40)

Published: June 7, 2023

The pursuit of high metal utilization in heterogeneous catalysis has triggered the burgeoning interest various atomically dispersed catalysts. Our aim this review is to assess key recent findings synthesis, characterization, structure-property relationship and computational studies dual-atom catalysts (DACs), which cover full spectrum applications thermocatalysis, electrocatalysis photocatalysis. In particular, combination qualitative quantitative characterization with cooperation DFT insights, synergies superiorities DACs compare counterparts, high-throughput catalyst exploration screening machine-learning algorithms are highlighted. Undoubtably, it would be wise expect more fascinating developments field as tunable

Language: Английский

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Coupling Co-Ni phosphides for energy-saving alkaline seawater splitting

Nano Research, Journal Year: 2024, Volume and Issue: 17(6), P. 4797 - 4806

Published: Feb. 7, 2024

Language: Английский

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Understanding the bifunctional catalytic ability of electrocatalysts for oxygen evolution reaction and urea oxidation Reaction: Recent advances and perspectives

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 471, P. 144660 - 144660

Published: July 11, 2023

Language: Английский

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Symmetry‐Broken Ru Nanoparticles with Parasitic Ru‐Co Dual‐Single Atoms Overcome the Volmer Step of Alkaline Hydrogen Oxidation

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(12)

Published: Jan. 30, 2024

Abstract Efficient dual‐single‐atom catalysts are crucial for enhancing atomic efficiency and promoting the commercialization of fuel cells, but addressing sluggish kinetics hydrogen oxidation reaction (HOR) in alkaline media facile site generation remains formidable challenges. Here, we break local symmetry ultra‐small ruthenium (Ru) nanoparticles by embedding cobalt (Co) single atoms, which results release Ru atoms from on reduced graphene oxide (Co 1 1,n /rGO). In situ operando spectroscopy theoretical calculations reveal that oxygen‐affine Co atom disrupts nanoparticles, resulting parasitic within nanoparticles. The interaction between forms effective active centers. parasitism modulates adsorption OH intermediates sites, accelerating HOR through faster formation *H 2 O. As anticipated, /rGO exhibits ultrahigh mass activity (7.68 A mg −1 ) at 50 mV exchange current density (0.68 mA cm −2 ), 6 7 times higher than those Ru/rGO, respectively. Notably, it also displays exceptional durability surpassing commercial Pt catalysts. This investigation provides valuable insights into hybrid multi‐single‐atom metal nanoparticle catalysis.

Language: Английский

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