Durable CO2 conversion in the proton-exchange membrane system

Nature, Journal Year: 2024, Volume and Issue: 626(7997), P. 86 - 91

Published: Jan. 31, 2024

Language: Английский

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Enrichment of reactants and intermediates for electrocatalytic CO₂reduction

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(13), P. 4343 - 4380

Published: Jan. 1, 2023

The electrocatalytic carbon dioxide reduction reaction (CO2RR) presents a sustainable route to convert renewable electricity value-added fuels and feedstocks in the form of chemical energy. However, selectivity rate conversion CO2 desirable carbon-based products, especially multicarbon remain below requirement for its implementation at commercial scale, which primarily originates from inadequate reactants intermediates near catalytic surfaces during CO2RR. enrichment provides one coping guidelines improve CO2RR performance by accelerating improving product selectivity. Herein, we discuss strategies achieve through catalyst design, local microenvironment modulation, electrolyte regulation, electrolyzer optimization. structure properties are first presented, showing necessity feasibility enriching intermediates. Next, influence effect on electrolysis, i.e., selectivity, comprehensively discussed. Then, design micrometer scale atom including wettability morphology surface modification, tandem construction, as well engineering, is highlighted implement Catalyst restructuring process impact also Subsequently, modulating high utilization produce products reviewed. After that, insights into regulation provided investigating various electrolytes, aqueous solutions, organic solvents, ionic liquids. Additionally, key role optimization promoting considered. We end review outlining remaining technological challenges providing feasible suggestions aimed directing future employment propel practical electrolysis technology.

Language: Английский

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Efficient multicarbon formation in acidic CO2 reduction via tandem electrocatalysis

Nature Nanotechnology, Journal Year: 2023, Volume and Issue: 19(3), P. 311 - 318

Published: Nov. 23, 2023

Language: Английский

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Tailoring acidic microenvironments for carbon-efficient CO₂electrolysis over a Ni–N–C catalyst in a membrane electrode assembly electrolyzer

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(4), P. 1502 - 1510

Published: Jan. 1, 2023

By tailoring the microenvironments of a Ni–N–C catalyst in an acidic MEA electrolyzer, we achieve CO faradaic efficiency 95% at 500 mA cm −2 , and 2 loss is reduced by 86% 300 pH 0.5, compared to alkaline electrolysis.

Language: Английский

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Surface hydroxide promotes CO2 electrolysis to ethylene in acidic conditions

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

Published: April 25, 2023

Performing CO2 reduction in acidic conditions enables high single-pass conversion efficiency. However, a faster kinetics of the hydrogen evolution reaction compared to limits selectivity toward multicarbon products. Prior studies have shown that adsorbed hydroxide on Cu surface promotes neutral and alkaline conditions. We posited limited species could contribute low Here we report an electrodeposited catalyst suppresses formation selective Using situ time-resolved Raman spectroscopy, show concentration CO OH C-C coupling, finding correlate with evidence increased residence time. The optimized achieves 60% faradaic efficiency for ethylene 90% When deployed slim flow cell, attains 20% energy ethylene, 30%

Language: Английский

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High‐Rate and Selective CO₂ Electrolysis to Ethylene via Metal–Organic‐Framework‐Augmented CO₂ Availability

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(51)

Published: Oct. 17, 2022

High-rate conversion of carbon dioxide (CO2 ) to ethylene (C2 H4 in the CO2 reduction reaction RR) requires fine control over phase boundary gas diffusion electrode (GDE) overcome limit solubility aqueous electrolytes. Here, a metal-organic framework (MOF)-functionalized GDE design is presented, based on catalysts:MOFs:hydrophobic substrate materials layered architecture, that leads high-rate and selective C2 production flow cells membrane assembly (MEA) electrolyzers. It found using electroanalysis operando X-ray absorption spectroscopy (XAS), MOF-induced organic layers GDEs augment local concentration near active sites Cu catalysts. MOFs with different adsorption abilities are used, stacking ordering varied. While sputtering poly(tetrafluoroethylene) (PTFE) (Cu/PTFE) exhibits 43% Faradaic efficiency (FE) at current density 200 mA cm-2 cell, 49% FE 1 A achieved MOF-augmented RR. further evaluated an MEA electrolyzer, achieving partial 220 for RR 121 monoxide (CORR), representing 2.7-fold 15-fold improvement rate, compared those obtained bare Cu/PTFE.

Language: Английский

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Highly Enhanced Chloride Adsorption Mediates Efficient Neutral CO₂ Electroreduction over a Dual-Phase Copper Catalyst

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(15), P. 8714 - 8725

Published: April 6, 2023

Electrocatalytic carbon dioxide reduction (CO

Language: Английский

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Energy- and carbon-efficient CO2/CO electrolysis to multicarbon products via asymmetric ion migration–adsorption

Nature Energy, Journal Year: 2023, Volume and Issue: 8(2), P. 179 - 190

Published: Jan. 12, 2023

Language: Английский

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Surface passivation for highly active, selective, stable, and scalable CO2 electroreduction

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

Published: Aug. 3, 2023

Electrochemical conversion of CO2 to formic acid using Bismuth catalysts is one the most promising pathways for industrialization. However, it still difficult achieve high production at wide voltage intervals and industrial current densities because Bi are often poisoned by oxygenated species. Herein, we report a Bi3S2 nanowire-ascorbic hybrid catalyst that simultaneously improves selectivity, activity, stability applied voltages. Specifically, more than 95% faraday efficiency was achieved formate formation over potential range above 1.0 V ampere-level densities. The observed excellent catalytic performance attributable unique reconstruction mechanism form defective sites while ascorbic layer further stabilized trapping poisoning hydroxyl groups. When used in an all-solid-state reactor system, newly developed efficient pure 120 hours 50 mA cm-2 (200 cell current).

Language: Английский

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Heterogeneous Catalysis for CO2 Conversion into Chemicals and Fuels

Transactions of Tianjin University, Journal Year: 2022, Volume and Issue: 28(4), P. 245 - 264

Published: Aug. 1, 2022

Abstract Catalytic conversion of CO 2 into chemicals and fuels is a viable method to reduce carbon emissions achieve neutrality. Through thermal catalysis, electrocatalysis, photo(electro)catalysis, can be converted wide range valuable products, including CO, formic acid, methanol, methane, ethanol, acetic propanol, light olefins, aromatics, gasoline, as well fine chemicals. In this mini-review, we summarize the recent progress in heterogeneous catalysis for highlight some representative studies different routes. The structure–performance correlations typical catalytic materials used reactions have been revealed by combining advanced situ/operando spectroscopy microscopy characterizations density functional theory calculations. selectivity toward single reduction product/fraction should further improved at an industrially relevant rate with considerable stability future. Graphical

Language: Английский

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