介孔材料
化学
法拉第效率
催化作用
化学工程
吸附
异质结
纳米颗粒
电化学
氧化物
纳米技术
无机化学
材料科学
电极
物理化学
光电子学
有机化学
工程类
作者
Wuzhengzhi Zhang,Nannan Zhu,Lianchun Ding,Yan Hu,Zhengcui Wu
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2021-11-29
卷期号:60 (24): 19356-19364
被引量:16
标识
DOI:10.1021/acs.inorgchem.1c03183
摘要
It is an ongoing pursuit for researchers to precisely control the catalyst's surface for high-performance CO2 electrochemical reduction (CO2ER). In this work, CuO mesoporous nanosheets (CuO MNSs) with rough edges decorated by small Ag nanoparticles (Ag NPs) with a tunable amount of Ag were synthesized on a Cu foil at normal atmospheric temperature through two-step solution-phase reactions for CO2ER to CO. In this special Ag NPs/CuO MNSs heterostructure, the mesoporous CuO NSs with rough edges favored gas infiltration, while decorated Ag NPs expanded the active sites for CO2 molecule adsorption. Ag NPs endowed Ag NPs/CuO MNSs with good electrical conductivity and promoted the adsorbed CO2 molecules to obtain electrons from the catalyst. Especially, the Ag-CuO interface stabilized the *COOH intermediate with strong bonding, which is important in boosting CO2ER to CO. The optimal Ag1.01%/CuO can catalyze CO2ER to CO with a Faradaic efficiency of 91.2% and a partial current density of 10.5 mA cm-2 at -0.7 V. Moreover, it exhibited prominent catalytic stability, retaining 97.8% of the initial current density and 97.6% of the original Faradaic efficiency for CO after 12 h of testing at -0.7 V. Notably, the Faradaic efficiency of CO on Ag1.01%/CuO can retain over 80% in the potential area from -0.6 to -0.9 V, embodying its high selectivity for CO. This work develops precious metal/metal oxide heterostructures with a low precious metal loading for efficacious CO2ER to CO and beyond.
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