串联催化CO2电还原通过在铜球上原位重组银纳米颗粒

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-05-29 DOI:10.1016/j.matlet.2025.138847

Yue Li , Jingjing Wu , Hongyu Pan , Jing Ling , Qian Zhang , BiYun Min , YiFan Wang , Xianglong Lu

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引用次数: 0

摘要

合理设计具有空间分离活性位点的串联催化剂是高效转化二氧化碳为乙烯的关键。在这项研究中，一个Cu@Np-Agx。采用恒电位沉积和电化学位移法制备了铜微球固载银纳米粒子的双金属串联催化剂。当表面银原子百分比为1.4%时，在−1.45 V时，乙烯法拉第效率为36%，比Cu/C高9倍，而析氢反应降低到29%。基于DFT和原位拉曼研究，这主要归因于铜银协同作用优化了电子转移路线，增强了*CO的吸附，促进了*OCHCH2中间体中*CO- cho的不对称偶联和O-C键的断裂，从而促进了乙烯的生成。

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Tandem catalytic CO2 electroreduction via in situ restructured silver nanoparticles on copper spheres

The rational design of tandem catalysts with spatially separated active sites is crucial for efficiently converting CO₂ to ethylene. In this study, a Cu@Np-Ag_x. bimetallic tandem catalyst, with Ag nanoparticles anchored on Cu microspheres, was fabricated via potentiostatic deposition and electrochemical displacement. With 1.4 % surface Ag atom percentage, it exhibits a 36 % ethylene Faraday efficiency at −1.45 V vs. RHE, nine times higher than that of Cu/C, while reducing the hydrogen evolution reaction to 29 %. Based on DFT and in-situ Raman studies, this is mainly ascribed to the copper-silver synergy that optimizes the electron transfer route, enhances the adsorption of *CO, prompts the asymmetric *CO-CHO coupling and the cleavage of the O-C bond in the *OCHCH₂ intermediate, thereby enhancing the generation of ethylene.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive