AI Article Synopsis
- Electroreduction of CO using a polymer-modified Cu catalyst showed high multi-electron reduction selectivity, but current densities are still too low for industrial use.
- A new poly(ionic liquid) (PIL)-based Cu-Cu tandem catalyst was developed, achieving a remarkable faradaic efficiency of 76.1% and a partial current density of 304.2 mA/cm².
- The study found that the unique interface between dispersed Cu and PIL layers significantly enhances reactivity and C selectivity by facilitating C-C coupling and lowering energy barriers.
Article Abstract
Electroreduction of CO on a polymer-modified Cu-based catalyst has shown high multi-electron reduction (>2 e ) selectivity, however, most of the corresponding current densities are still too small to support industrial applications. In this work, we designed a poly(ionic liquid) (PIL)-based Cu -Cu tandem catalyst for the production of C products with both high reaction rate and high selectivity. Remarkably, a high C faradaic efficiency (FE ) of 76.1 % with a high partial current density of 304.2 mA cm is obtained. Mechanistic studies reveal the numbers and highly dispersed Cu -PIL-Cu interfaces are vital for such reactivity. Specifically, Cu nanoparticles derived Cu -PIL interfaces account for high current density and a moderate C selectivity, whereas Cu species derived PIL-Cu interfaces exhibit high activity for C-C coupling with the local enriched *CO intermediate. Furthermore, the presence of the PIL layer promotes the C selectivity by lowering the barrier of C-C coupling.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/anie.202110657 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Lignin Tandem Catalytic Transformation to Phenolic Aryl Acrylic Esters as Plant Growth Regulators.
ChemSusChem
January 2025
Nanjing Forestry University, College of Light Industry and Food Engineering, CHINA.
Based on the concept "Derived from Agroforestry, belong to (Servicing) Agroforestry", we herein achieved the tandem catalytic transformation of lignin to phenolic aryl acrylic esters, which can work as plant growth regulators. The transformation involves the first catalytic oxidative fractionation (COF) of lignin into aromatic aldehydes, which can further undergo Knoevenagel condensation with acids/esters with active Cα-H to generate the phenolic aryl acrylic esters. For the first lignin transformation, the Cu salt (CuSO4) in a 7.
View Article and Find Full Text PDFCharge Transfer Mechanism in Type II WO/CuO Heterostructure.
Nanomaterials (Basel)
December 2024
Laboratory of Photoactive Nanocomposite Materials, Saint Petersburg State University, 199034 Saint-Petersburg, Russia.
In this study, we explore the charge transfer mechanism between WO and CuO in heterostructured WO/CuO electrodes and in a WO||CuO tandem photoelectrochemical cell. The physical-chemical characterizations of the individual WO and CuO electrodes and the heterostructured WO/CuO electrode by XRD, XPS, and SEM methods confirm the successful formation of the target systems. The results of photoelectrochemical studies infer that in both the heterostructured WO/CuO electrode and WO||CuO tandem photoelectrochemical cell, the major mechanism of charge transfer between WO and CuO is a realization of the Z-scheme.
View Article and Find Full Text PDFStructural Regulating of Cu-based Metallic Electrocatalysts for CO2 to C2+ Products Conversion.
ChemSusChem
December 2024
Huazhong University of Science and Technology, School of Chemistry and Chemical Engineering, Luoyu load, 430074, Wuhan, CHINA.
Electrochemical carbon dioxide reduction reaction (CO2RR) to highly value-added C2+ fuels or chemicals is a promising pathway to address environment issues and energy crisis. In the periodic table, Cu as only the candidate can convert CO2 to C2+ products such as C2H4 and C2H5OH due to the suitable absorption energy to reaction intermediate. Application of Cu is limited for its low activity and poor selectivity.
View Article and Find Full Text PDFPredesign of Covalent-Organic Frameworks for Efficient Photocatalytic Dehydrogenative Cross-Coupling Reaction.
Adv Mater
December 2024
National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs, Engineering Research Center of MTEES (Ministry of Education), and Key Lab. of ETESPG (GHEI), School of Chemistry, South China Normal University, Guangzhou, 510006, China.
The dehydrogenative cross-coupling reaction is the premier route for synthesizing important 4-quinazolinone drugs. However, it usually requires high reaction temperature and long reaction time, and the yield of the final product is low. Here two stable and photosensitive covalent-organic frameworks (COFs), TAPP-An and TAPP-Cu-An are purposefully designed and constructed to serve as unprecedented heterogeneous tandem catalysts to complete dehydrogenative cross-coupling reactions in a short time and under mild reaction conditions (room temperature and light), leading to the high-efficient photosynthesis of 4-quinazolinones.
View Article and Find Full Text PDFVisible-Light-Induced Photocatalytic Degradation of Naproxen Using 5% Cu/TiO, Transformation Products, and Mechanistic Studies.
Molecules
December 2024
Chemistry Department, College of Science, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates.
The presence of drugs in wastewater effluent is of concern due to their effects on the aquatic fauna and flora and there are growing efforts for their removal from the environment. In this paper, we study the photocatalytic visible-light degradation of naproxen, an over-the-counter anti-inflammatory drug, using 5% copper-doped TiO. The photocatalyst was characterized by XRD and BET surface area measurements.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!