Review on strategies for improving the added value and expanding the scope of CO₂ electroreduction products

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(10), P. 5149 - 5189

Published: Jan. 1, 2024

This review summarizes promising strategies including the design of catalysts and construction coupled electrocatalytic reaction systems, aimed at achieving selective production various products from CO 2 electroreduction.

Language: Английский

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Silica Confinement for Stable and Magnetic Co−Cu Alloy Nanoparticles in Nitrogen‐Doped Carbon for Enhanced Hydrogen Evolution

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(24)

Published: April 10, 2024

Ammonia borane (AB) with 19.6 wt % H

Language: Английский

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Hydrophobic SiO₂ Armor: Stabilizing Cu^δ+ to Enhance CO₂ Electroreduction toward C₂₊ Products in Strong Acidic Environments

ACS Nano, Journal Year: 2024, Volume and Issue: 18(23), P. 15303 - 15311

Published: May 28, 2024

Electroreduction of CO2 in highly acidic environments holds promise for enhancing utilization efficiency. Due to the HER interference and structural instability, however, challenges improving selectivity stability toward multicarbon (C2+) products remain. In this study, we proposed an "armor protection" strategy involving deposition ultrathin, hydrophobic SiO2 onto Cu surface (Cu/SiO2) through a simple one-step hydrolysis. Our results confirmed effective inhibition by layer, leading high Faradaic efficiency (FE) up 76.9% C2+ at current density 900 mA cm–2 under strongly condition with pH 1. The observed performance surpassed reported most previously studied Cu-based catalysts CO2RR systems. Furthermore, ultrathin shell was demonstrated effectively prevent reconstruction preserve oxidation state Cuδ+ active sites during CO2RR. Additionally, it hindered accumulation K+ ions on catalyst diffusion situ generated OH– away from electrode, thereby favoring product generation. Raman analyses coupled DFT simulations further elucidated that proficiently modulated *CO adsorption behavior Cu/SiO2 reducing energy, facilitating C–C coupling. This work offers compelling rationally designing exploiting stable environments.

Language: Английский

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Recent Advances and Challenges in Efficient Selective Photocatalytic CO₂ Methanation

Small, Journal Year: 2024, Volume and Issue: 20(32)

Published: March 15, 2024

Abstract Solar‐driven carbon dioxide (CO 2 ) methanation holds significant research value in the context of emission reduction and energy crisis. However, this eight‐electron catalytic reaction presents substantial challenges activity selectivity. In regard, researchers have conducted extensive exploration achieved developments. This review provides an overview recent advances efficient selective photocatalytic CO methanation. It begins by discussing fundamental principles detail, analyzing strategies for improving efficiency conversion to CH 4 comprehensively. Subsequently, it outlines applications advanced characterization methods Finally, highlights prospects opportunities area, aiming inspire into high‐value shed light on mechanisms.

Language: Английский

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In‐situ Reconstruction of Catalyst in Electrocatalysis

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 22, 2024

Abstract Reconstruction of catalysts is now well recognized as a common phenomenon in electrocatalysis. As the reconstructed structure may promote or hamper electrochemical performance, how to achieve designed active surface for highly enhanced catalytic activity through reconstruction needs be carefully investigated. In this review, genesis and effects various processes, such hydrogen evolution reaction (HER), oxygen (OER), carbon dioxide reduction (CO 2 RR), nitrate (NO 3 RR) are first described. Then, strategies optimizing reconstruction, valence states control, phase retention, engineering, poisoning prevention comprehensively discussed. Finally, general rules optimization summarized give perspectives future study. It believed that review shall provide deep insights into electrocatalytic mechanisms guide design pre‐catalysts with improved activity.

Language: Английский

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Unveiling the role of heteroatom doping and strain in Core-Shell catalysts for CO2RR

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160155 - 160155

Published: Feb. 1, 2025

Language: Английский

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Enhanced Local CO Coverage on Cu Quantum Dots for Boosting Electrocatalytic CO₂ Reduction to Ethylene

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 29, 2024

Abstract Ethylene (C 2 H 4 ) electrosynthesis from the electrocatalytic CO reduction process holds enormous potential applications in industrial production. However, sluggish kinetics of C─C coupling often result low yield and poor selectivity for C Herein, performance Cu catalysts varying sizes is investigated, prepared via a cryo‐mediated liquid phase exfoliation technique, electrochemical to . The activity gradually increase as size decreases tens nanometers few nanometers. Impressively, 5 nm quantum dots (Cu‐5) achieve maximum Faradaic efficiency (FE) 81.5% half‐cell cathodic energy (CEE) 42.2% with large partial current density 1.1 A cm −2 at −0.93 V versus reversible hydrogen electrode. Structural characterization situ spectroscopic analysis reveal that Cu‐5 dots, dominated by (100) facet, provide an abundance active sites enhance adsorption activation, promoting formation *CO intermediates. accumulation intermediates on facilitates CO‐CHO reaction, thus enhancing production rate.

Language: Английский

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Enhancing CO₂ Electroreduction Performance through Si-Doped CuO: Stabilization of Cu⁺/Cu⁰ Sites and Improved C₂ Product Selectivity

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(13), P. 10324 - 10333

Published: June 25, 2024

Language: Английский

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Activating *CO by Strengthening Fe–CO π‐Backbonding to Enhance Two‐Carbon Products Formation toward CO₂ Electroreduction on Fe–N₄ Sites

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: April 10, 2024

Abstract Many non‐precious metal‐nitrogen (M–N x )‐containing catalysts are highly efficient for electrochemical reduction of CO 2 to and yet encounter challenges in further converting more valuable two‐carbon products (C2), such as ethanol acetic acid. The ambiguous structure‐activity relationship the M–N moieties toward reaction (CO RR) results difficulties regulating RR product selectivity on ‐containing catalysts. Herein, by using fluorinated iron phthalocyanines with axial‐coordinated ligands (L–FePc–F) an 4 ‐based model electrocatalyst RR, a correlation between electronic structure C2 Fe–N is revealed comprehensive descriptor based Fe–CO π‐backbonding proposed guiding regulation higher selectivity. Based principle, Br‐axial‐coordinated FePc–F (Br–FePc–F) remarkably increases Faradic efficiency (FE) from 0% (i.e., FE FePc–F) 34% due strengthened stemming elevated 3 d xz / yz orbital energy enhanced electron‐donating ability Fe centers . This work provides strategy mechanism insights moieties, which may be inspiring precise construction specific products.

Language: Английский

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Alloying and confinement effects on hierarchically nanoporous CuAu for efficient electrocatalytic semi-hydrogenation of terminal alkynes

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: July 17, 2024

Abstract Electrocatalytic alkynes semi-hydrogenation to produce alkenes with high yield and Faradaic efficiency remains technically challenging because of kinetically favorable hydrogen evolution reaction over-hydrogenation. Here, we propose a hierarchically nanoporous Cu 50 Au alloy improve electrocatalytic performance toward alkynes. Using Operando X-ray absorption spectroscopy density functional theory calculations, find that modulate the electronic structure Cu, which could intrinsically inhibit combination H* form H 2 weaken alkene adsorption, thus promoting alkyne hampering Finite element method simulations experimental results unveil catalysts induce local microenvironment abundant K + cations by enhancing electric field within nanopore, accelerating water electrolysis more H*, thereby conversion As result, electrocatalyst achieves highly efficient 94% conversion, 100% selectivity, 92% over wide potential window. This work provides general guidance rational design for high-performance transfer catalysts.

Language: Английский

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