Hydrophobic carbon quantum dots with Lewis-Basic nitrogen sites for electrocatalyst CO2 reduction to CH4

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 157207 - 157207

Опубликована: Окт. 1, 2024

Язык: Английский

---

Understanding and Tuning the Effects of H₂O on Catalytic CO and CO₂ Hydrogenation

Chemical Reviews, Год журнала: 2024, Номер 124(21), С. 12006 - 12085

Опубликована: Окт. 31, 2024

Catalytic COx (CO and CO2) hydrogenation to valued chemicals is one of the promising approaches address challenges in energy, environment, climate change. H2O an inevitable side product these reactions, where its existence effect are often ignored. In fact, significantly influences catalytic active centers, reaction mechanism, performance, preventing us from a definitive deep understanding on structure-performance relationship authentic catalysts. It necessary, although challenging, clarify provide practical strategies tune concentration distribution optimize influence. this review, we focus how induces structural evolution catalysts assists processes, as well efforts understand underlying mechanism. We summarize discuss some representative tuning for realizing rapid removal or local enrichment around catalysts, along with brief techno-economic analysis life cycle assessment. These fundamental understandings further extended reactions CO CO2 reduction under external field (light, electricity, plasma). also present suggestions prospects deciphering controlling applications.

Язык: Английский

---

Copper/metal oxide heterostructures for electrochemical carbon dioxide reduction

Rare Metals, Год журнала: 2025, Номер unknown

Опубликована: Янв. 13, 2025

Язык: Английский

---

Establishment of Gas–Liquid–Solid Interface on Multilevel Porous Cu₂O for Potential-Driven Selective CO₂ Electroreduction toward C₁ or C₂ Products

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Янв. 20, 2025

Copper-based catalysts demonstrate distinctive multicarbon product activity in the CO2 electroreduction reaction (CO2RR); however, their low selectivity presents significant challenges for practical applications. Herein, we have developed a multilevel porous spherical Cu2O structure, wherein mesopores are enriched with catalytic active sites and effectively stabilize Cu+, while macropores facilitate formation of "gas–liquid–solid" three-phase interface, thereby creating microenvironment an increasing water concentration gradient from interior to exterior. Potential-driven phase engineering protonation synergistically optimize pathway, facilitating switch between CO C2H4. At current density 100 mA cm–2, faradaic efficiency (FE) reaches impressive 96.97%. When increases 1000 FEC2H4 attains 53.05%. Experiments theoretical calculations indicate that at lower potentials, pure diminishes adsorption *CO intermediates, weak inhibits hydrogen evolution reactions, promoting production. Conversely, more negative Cu0/Cu+ interface strong generate locally elevated concentrations *COOH which enhance C–C coupling deep hydrogenation, ultimately improving toward C2+ products. This study provides novel insights into rational design copper-based customizable

Язык: Английский

---

Electrochemical CO₂ Reduction in Acidic Media: A Perspective

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Март 4, 2025

The electrochemical CO2 reduction reaction (eCO2RR) is a promising approach for converting to useful chemicals and, hence, achieving carbon neutrality. Though high selectivity and activity of products have been achieved recently, all are reported in neutral or alkaline electrolytes. Although these electrolyte media give activity, they face the major challenge low utilization because carbonate formation, which lowers overall efficiency process. Conducting eCO2RR acidic can help overcome issue formation hence increase efficiency. However, there many challenges associated with eCO2RR. Two concerns highly competitive hydrogen evolution salt precipitation issues. This Perspective focuses on fundamentals eCO2RR, recent catalyst development strategies, relevant problems that need be addressed future. In end, we provide future outlook will an idea about focus field

Язык: Английский

---

Constructing Favorable Microenvironment on Copper Grain Boundaries for CO₂ Electro-conversion to Multicarbon Products

Nano Letters, Год журнала: 2024, Номер 24(30), С. 9345 - 9352

Опубликована: Июль 16, 2024

The electrochemical CO2 reduction reaction (eCO2RR) to multicarbon chemicals provides a promising avenue for storing renewable energy. Herein, we synthesized small Cu nanoparticles featuring enriched tiny grain boundaries (RGBs-Cu) through spatial confinement and in situ electroreduction. In-situ spectroscopy theoretical calculations demonstrate that small-sized significantly enhance the adsorption of *CO intermediate, owing presence abundant low-coordinated disordered atoms. Furthermore, these boundaries, generated under high current conditions, exhibit excellent stability during eCO2RR process, thereby creating stable *CO-rich microenvironment. This local concentration around catalyst surface can reduce energy barrier C–C coupling increase Faradaic efficiency (FE) products across both neutral alkaline electrolytes. Specifically, developed RGBs-Cu electrocatalyst achieved peak FE 77.3% maintained more than 134 h at constant density −500 mA cm–2.

Язык: Английский

---

Radiation‐Synthesized Metal–Organic Frameworks with Ligand‐Induced Lewis Pairs for Selective CO₂ Electroreduction

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 15, 2024

Abstract The electrochemical activation of inert CO 2 molecules through C─C coupling reactions under ambient conditions remains a significant challenge but holds great promise for sustainable development and the reduction emission. Lewis pairs can capture react with , offering novel strategy electrosynthesis high‐value‐added C2 products. Herein, an electron‐beam irradiation is presented rapidly synthesizing metal–organic framework (MOF) well‐defined (i.e., Cu‐ N pyridinic ). synthesized MOFs exhibit total product faradic efficiency 70.0% at −0.88 V versus RHE. In situ attenuated reflection Fourier transform infrared Raman spectra reveal that electron‐deficient acidic Cu sites electron‐rich basic in ligand facilitate targeted chemisorption, activation, conversion molecules. DFT calculations further elucidate electronic interactions key intermediates reaction. work not only advances pair‐site as new platform conversion, also provides pioneering insights into underlying mechanisms irradiated synthesis advanced nanomaterials.

Язык: Английский

---

Catalyst design for the electrochemical reduction of carbon dioxide: from copper nanoparticles to copper single atoms

Microstructures, Год журнала: 2025, Номер 5(1)

Опубликована: Янв. 17, 2025

Carbon dioxide reduction reaction (CO2RR) is an efficacious method to mitigate carbon emissions and simultaneously convert CO2 into high-value products. The efficiency of CO2RR depends on the development highly active selective catalysts. Copper (Cu)-based catalysts can effectively reduce hydrocarbons oxygen-containing compounds because their unique geometric electronic structures. Most importantly, Cu multiple products (C2+). Therefore, this review aims outline recent research progress in Cu-based for CO2RR. After introducing mechanism electroreduction reaction, we summarize influence size, morphology, coordination environment single component performance, especially performance control that contain nano or single-atom sites. Then, synergistic regulation strategies doping other metals are summarized. Finally, supports used reviewed. prospects challenges discussed.

Язык: Английский

---

Catalysis Enhanced by Catalyst Wettability

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Фев. 20, 2025

Heterogeneous catalysis is a surface phenomenon where the adsorption, desorption, and transfer of reactants products are critical for catalytic performance. Recent results show that catalyst wettability strongly related to products. In this review, we briefly summarize strategies regulating enrich reactants, accelerate desorption products, promote mass in heterogeneous catalysis. addition, explore insights into enhancement Finally, concerns challenges subject outlined, practical proposed regulation wettability. We hope review will be helpful designing highly efficient catalysts future.

Язык: Английский

---

Dynamic Behavior of Liquids on Superspreading Surfaces: From Essential Mechanisms to Applications

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 27, 2025

The interaction between liquids and surfaces is a common phenomenon in nature has attracted extensive scientific attention. Among these interactions, the dynamic behavior of on superspreading exhibits significant diversity, which can be categorized into four processes: impact, spreading, film formation, phase transition. Traditional characterization using equilibrium contact angle (CA) proves insufficient for describing liquid behaviors. Recent studies introduce time (ST) curve radius versus spreading (SRST), providing comprehensive understanding processes. This review systematically analyzes behaviors surfaces, including their underlying mechanisms associated influencing factors. Furthermore, we discuss applications by categorizing them unsteady-state films steady-state films. leverage processes, such as transition, to enhance thermal management efficiency, bubble detachment, photothermal conversion, convective heat transfer. In contrast, focus stable thin formation use areas antifouling coatings, drag reduction, biomaterial enhancement, uniform fabrication. Finally, highlight existing challenges liquid-solid fundamental research industrial applications. provides insights both practical arousing attention field strengthen mechanism promote

Язык: Английский

---