Biofuel production, hydrogen production and water remediation by photocatalysis, biocatalysis and electrocatalysis

Environmental Chemistry Letters, Journal Year: 2023, Volume and Issue: 21(3), P. 1315 - 1379

Published: March 10, 2023

Abstract The energy crisis and environmental pollution have recently fostered research on efficient methods such as catalysis to produce biofuel clean water. Environmental refers green catalysts used breakdown pollutants or chemicals without generating undesirable by-products. For example, derived from waste inexpensive materials are promising for the circular economy. Here we review photocatalysis, biocatalysis, electrocatalysis, with focus catalyst synthesis, structure, applications. Common include biomass-derived materials, metal–organic frameworks, non-noble metals nanoparticles, nanocomposites enzymes. Structure characterization is done by Brunauer–Emmett–Teller isotherm, thermogravimetry, X-ray diffraction photoelectron spectroscopy. We found that water can be degraded an efficiency ranging 71.7 100%, notably heterogeneous Fenton catalysis. Photocatalysis produced dihydrogen (H 2 ) generation rate higher than 100 μmol h −1 . Dihydrogen yields ranged 27 88% methane cracking. Biodiesel production reached 48.6 99%.

Language: Английский

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Design of modified MOFs electrocatalysts for water splitting: High current density operation and long-term stability

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 336, P. 122891 - 122891

Published: May 18, 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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Oxygen Vacancies and Interface Engineering on Amorphous/Crystalline CrO_x‐Ni₃N Heterostructures toward High‐Durability and Kinetically Accelerated Water Splitting

Small, Journal Year: 2022, Volume and Issue: 18(14)

Published: Feb. 12, 2022

Manipulating catalytic active sites and reaction kinetics in alkaline media is crucial for rationally designing mighty water-splitting electrocatalysts with high efficiency. Herein, the coupling between oxygen vacancies interface engineering highlighted to fabricate a novel amorphous/crystalline CrOx -Ni3 N heterostructure grown on Ni foam accelerating hydrogen evolution (HER) (OER). Density functional theory (DFT) calculations reveal that electron transfer from amorphous Ni3 at interfaces, optimized Gibbs free energies of H2 O dissociation (ΔGH-OH ) H adsorption (ΔGH are conducive superior stable HER activity. Experimental data confirm numerous interfaces catalysts favorable abundant accessible enhanced intrinsic activity, resulting excellent performances OER. Additionally, situ reconstruction into highly N/Ni(OH)2 responsible OER performance long-term stability test. Eventually, an electrolyzer using as both cathode anode has low cell voltage 1.53 V 10 mA cm-2 , together extraordinary durability 500 h, revealing its potential industrial applications.

Language: Английский

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Theoretical investigation of HER/OER/ORR catalytic activity of single atom-decorated graphyne by DFT and comparative DOS analyses

Applied Surface Science, Journal Year: 2022, Volume and Issue: 592, P. 153237 - 153237

Published: March 29, 2022

Language: Английский

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