Efficient acidic CO2 electroreduction to formic acid by modulating electrode structure at industrial-level current

Chemical Engineering Journal, Год журнала: 2024, Номер 489, С. 151238 - 151238

Опубликована: Апрель 14, 2024

Язык: Английский

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Free‐standing Stanene for High Selectivity of Formate in Electrocatalytic Carbon Dioxide Reduction Reaction

Advanced Energy Materials, Год журнала: 2024, Номер 14(13)

Опубликована: Янв. 26, 2024

Abstract As well‐known electrocatalysts with good catalytic efficiency for carbon dioxide reduction reaction (CO 2 RR) towards the production of formate, tin (Sn)‐based catalysts have aroused broad concern. Here, free‐standing porous stanene is synthesized first time by a facile wet chemical method, and its excellent electrocatalytic performance formate (HCOO − ) formation in CO RR demonstrated. High Faradaic (F.E., 93% at −930 mV versus reversible hydrogen electrode (RHE)) can be achieved catalyzed 0.5 m KHCO 3 aqueous solution. The situ Mössbauer spectra reveal that zero‐valent Sn aids improving selectivity production. Furthermore, density functional theory calculations suggest high HCOO on mainly originates from edge sites (100). To further explore practicability stanene‐based RR, decorated wt% BP‐2000 prepared, showing an F.E. 98% RHE due to higher exposure active sites. These new findings activity origination mechanism contribute deeper understanding Sn‐based which beneficial future designation highly efficient catalysts.

Язык: Английский

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Pd-Decorated Cu₂O–Ag Catalyst Promoting CO₂ Electroreduction to C₂H₄ by Optimizing CO Intermediate Adsorption and Hydrogenation

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(13), С. 16243 - 16252

Опубликована: Март 25, 2024

Electrocatalytic CO2 reduction reaction (CO2RR) to high value-added products, such as ethylene (C2H4), offers a promising approach achieve carbon neutrality. Although recent studies have reported that tandem catalyst (for example, Cu–Ag systems) exhibits advantage in C2H4 production, its practical application is largely inhibited by the following: (1) traditional cannot effectively stabilize *CO intermediate, resulting sluggish C–C coupling, and (2) inadequate H2O activation ability hinders hydrogenation of intermediates. To break through above bottleneck, herein, palladium (Pd) was introduced into Cu2O–Ag, typical conventional catalyst, construct Cu2O–Pd–Ag ternary catalyst. Extensive experiment density functional theory calculation prove Pd can efficiently intermediate promote activation, which contributes coupling hydrogenation, key steps conversion C2H4. Beneficial efficient synergy Cu2O, Pd, Ag, optimal achieves CO2RR toward with faradaic efficiency 63.2% at −1.2 VRHE, higher than achieved Cu2O–Ag most other catalysts. This work fruitful exploration rare providing new route for constructing an electrocatalyst.

Язык: Английский

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Interfacial Electronic Interaction in Amorphous–Crystalline CeO_x‐Sn Heterostructures for Optimizing CO₂ to Formate Conversion

Small, Год журнала: 2024, Номер 20(32)

Опубликована: Март 18, 2024

Abstract Formate, a crucial chemical raw material, holds significant promise for industrial applications in the context of CO 2 electroreduction reaction (CO RR). Despite its potential, challenges, such as poor selectivity and low formation rate at high current densities persist, primarily due to competing hydrogen evolution (HER) energy barriers associated with *OCHO intermediate generation. Herein, one‐step co‐reduction strategy is employed construct an amorphous–crystalline CeO x ‐Sn heterostructure, demonstrating remarkable catalytic performance converting formate. The optimized heterostructures reach density 265.1 mA cm −2 formate Faraday efficiency 95% −1.07 V versus RHE. Especially, achieves 444.4 production 9211.8 µmol h −1 −1.67 RHE, surpassing most previously reported materials. Experimental results, coupled （density functional theory）DFT calculations confirm that robust interface interaction between Sn active center induces electron transfer from crystalline site amorphous , some Ce 4+ get electrons convert unsaturated 3+ optimizing electronic structure Sn. This heterostructure promotes during RR, reducing barrier formed by intermediates, thus achieving efficient reduction

Язык: Английский

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Pressure regulated CO₂ electrolysis on two-dimensional Bi₂O₂Se

Chemical Communications, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

A 2D Bi 2 O Se catalyst with low mass loading demonstrates enhanced performance in CO reduction to formate under high pressure. By pressurizing from ambient 40 bar, the selectivity and partial current density increase significantly.

Язык: Английский

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