Recent advances in CO₂ capture and reduction

Nanoscale, Journal Year: 2022, Volume and Issue: 14(33), P. 11869 - 11891

Published: Jan. 1, 2022

Given the continuous and excessive CO2 emission into atmosphere from anthropomorphic activities, there is now a growing demand for negative carbon technologies, which requires efficient capture conversion of to value-added chemicals. This review highlights recent advances in chemistry processes. It first summarizes various adsorbent materials that have been developed capture, including hydroxide-, amine-, metal organic framework-based adsorbents. then reviews efforts devoted two types reaction: thermochemical hydrogenation electrochemical reduction. While thermal reactions are often accomplished presence H2, realized by direct use electricity can be renewably generated solar wind power. The key success these develop catalysts rationally engineer catalyst-electrolyte interfaces. further covers studies integrating processes so energy efficiency overall optimized. Lastly, briefs some new approaches future directions coupling air technologies as solutions sustainability.

Language: Английский

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Methyl formate as a hydrogen energy carrier

Nature Catalysis, Journal Year: 2023, Volume and Issue: 6(6), P. 543 - 550

Published: June 22, 2023

Abstract The use of renewable energy is central for the realization a circular economy, which essential further global economic development. In this background, hydrogen storage materials play an important role. Here we propose previously overlooked, industrially available bulk chemical (methyl formate, MF) as efficient and practical material. Utilizing appropriate catalysts, production from MF significantly faster than with other established carriers, such formic acid methanol, under very mild conditions. optimized dehydrogenation system presented here highly active (maximum turnover frequency (TOF max ) > 44,000 h −1 number 100,000) selective (CO undetectable). Moreover, solvent-free demonstrates its application potential. show reaction MF. We expect that these insights will serve inspiration development alternative new catalytic transformations.

Language: Английский

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Modulating Metal‐Nitrogen Coupling in Anti‐Perovskite Nitride via Cation Doping for Efficient Reduction of Nitrate to Ammonia

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(38)

Published: Aug. 1, 2023

The complexes of metal center and nitrogen ligands are the most representative systems for catalyzing hydrogenation reactions in small molecule conversion. Developing heterogeneous catalysts with similar active metal-nitrogen functional centers, nevertheless, still remains challenging. In this work, we demonstrate that coupling anti-perovskite Co4 N can be effective modulated by Cu doping to form Co3 CuN, leading strongly promoted process during electrochemical reduction nitrate (NO3- RR) ammonia. combination advanced spectroscopic techniques density theory calculations reveal dopants strengthen Co-N bond upshifted d-band towards Fermi level, promoting adsorption NO3- *H facilitating transition from *NO2 /*NO H/*NOH. Consequently, CuN delivers noticeably better RR activity than pristine N, optimal Faradaic efficiency 97 % ammonia yield 455.3 mmol h-1 cm-2 at -0.3 V vs. RHE. This work provides an strategy developing high-performance catalyst synthesis.

Language: Английский

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Strained few-layer MoS2 with atomic copper and selectively exposed in-plane sulfur vacancies for CO2 hydrogenation to methanol

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Sept. 21, 2023

Abstract In-plane sulfur vacancies (Sv) in molybdenum disulfide (MoS 2 ) were newly unveiled for CO hydrogenation to methanol, whereas edge Sv found facilitate methane formation. Thus, selective exposure and activation of basal plane is crucial methanol synthesis. Here, we report a mesoporous silica-encapsulated MoS catalysts with fullerene-like structure atomic copper (Cu / @SiO ). The main approach based on physically constrained topologic conversion dioxide (MoO within silica. spherical curvature enables the generation strain inert plane. More importantly, few-layer can selectively expose in-plane reduce Sv. After promotion by copper, resultant Cu exhibits stable specific yield 6.11 mol MeOH Mo –1 h selectivity 72.5% at 260 °C, much superior its counterparts lacking decoration. reaction mechanism promoting role are investigated in-situ DRIFTS XAS. Theoretical calculations demonstrate that compressive facilitates formation hydrogenation, while tensile accelerates regeneration active sites, rationalizing critical strain.

Language: Английский

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A critical review of the use of nanomaterials in the biomass pyrolysis process

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 400, P. 136705 - 136705

Published: March 7, 2023

Language: Английский

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A Review of Carbon Capture and Valorization Technologies

Energies, Journal Year: 2023, Volume and Issue: 16(6), P. 2589 - 2589

Published: March 9, 2023

Global fossil fuel consumption has induced emissions of anthropogenic carbon dioxide (CO2), which emanated global warming. Significant levels CO2 are released continually into the atmosphere from extraction fuels to their processing and combustion for heat power generation including fugitive industries unmanaged waste management practices such as open burning solid wastes. With an increase in population subsequent rise energy demands generation, rate release is at a much faster than its recycling through photosynthesis or fixation, increases net accumulation atmosphere. A large amount emitted various sources plants, vehicles manufacturing industries. Thus, capture plays key role race achieve zero emissions, paving path decarbonized economy. To reduce footprints industrial vehicular attempt mitigate effects warming, several capturing valorization technologies have become increasingly important. Hence, this article gives statistical geographical overview other greenhouse gas based on source sector. The review also describes different mechanisms involved utilization pre-combustion, post-combustion, oxy-fuels technologies, direct air capture, chemical looping gasification, ionic liquids, biological fixation geological capture. discusses captured value-added products clean energy, chemicals materials (carbonates polycarbonates supercritical fluids). This highlights certain progressing some promising techniques.

Language: Английский

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Photocatalytic CO₂ Reduction Using CO₂‐Binding Enzymes

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(16)

Published: Feb. 7, 2024

Abstract Novel concepts to utilize carbon dioxide are required reach a circular economy and minimize environmental issues. To achieve these goals, photo‐, electro‐, thermal‐, biocatalysis key tools realize this, preferentially in aqueous solutions. Nevertheless, catalytic systems that operate efficiently water scarce. Here, we present general strategy for the identification of enzymes suitable CO 2 reduction based on structural analysis potential binding sites subsequent mutations. We discovered phenolic acid decarboxylase from Bacillus subtilis (BsPAD) promotes photocatalytic selectively monoxide presence ruthenium photosensitizer sodium ascorbate. With engineered variants BsPAD, TONs up 978 selectivities 93 % (favoring desired over H generation) were achieved. Mutating active site region BsPAD further improved turnover numbers generation. This also revealed electron transfer is rate‐limiting occurs via multistep tunneling. The generality this approach was proven by using eight other enzymes, all showing activity underlining range proteins capable reduction.

Language: Английский

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Strategies to improve hydrogen activation on gold catalysts

Nature Reviews Chemistry, Journal Year: 2024, Volume and Issue: 8(3), P. 195 - 210

Published: Feb. 23, 2024

Language: Английский

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Facile preparation of N-doped porous carbon from chitosan and NaNH2 for CO2 adsorption and conversion

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 432, P. 134347 - 134347

Published: Dec. 28, 2021

Language: Английский

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Homogeneous Hydrogenation of CO₂ and CO to Methanol: The Renaissance of Low‐Temperature Catalysis in the Context of the Methanol Economy

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(42)

Published: Aug. 3, 2022

The traditional economy based on carbon-intensive fuels and materials has led to an exponential rise in anthropogenic CO

Language: Английский

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