通过增加对增强的CO2电还原和Li-CO2电池的支持利用,揭示CuOCe接口站点的构建
Qinghua Deng1, Yong Yang2, Wentian Zhao2
1School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, PR China; School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China.
Journal of colloid and interface science
|August 13, 2023
概括
在氧化 (CeO2) 上支持的铜显示出减少二氧化碳的前景. 使用金属有机框架 (MOF) 作为前体可提高CO2电催化和-CO2电池的催化剂性能和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 在二氧化碳还原反应 (CO2RR) 中,电子氧化物-金属相互作用 (EOMI) 对支持的铜催化剂至关重要.
- 传统氧化 (CeO2) 支持的利用效率有限,以及CeO2晶体面对铜物种不清楚的影响,妨碍了催化剂的性能.
- 金属有机框架 (MOFs) 为先进的催化剂设计提供高表面积和可调节性质.
研究的目的:
- 研究不同氧化 (CeO2) 水晶面对铜 (Cu) 活性物种对增强CO2RR的作用.
- 为改进的Cu/CeO2催化剂开发一种使用MOF前体的新型合成策略.
- 评估MOF衍生的Cu/CeO2催化剂在CO2电催化反应和-CO2 (Li-CO2) 电池中的阴极中的性能.
主要方法:
- 合成Cu/CeO2催化剂使用基于的MOF前体,具有多样化的晶体面.
- 二氧化碳还原反应 (CO2RR) 的电化学特征和-二氧化碳电池的性能.
- 密度函数理论 (DFT) 的计算分析了CeO2晶体面的影响 ((111), (100), (110)) 负载的铜物种.
主要成果:
- 由MOF衍生的Cu/CeO2催化剂表现出增强的催化活性和稳定性,这是由于活性位点的扩散和导电率的提高.
- 电催化剂的峰值二氧化碳转化甲法拉戴效率为57.9%.
- 组装的Li-CO2电池表现出高放电容量8907 mAh/g,电压2.65 V,以及超过1000小时的循环寿命.
- DFT的计算确定了CeO2 (110) 方面是最佳的,用于增强铜种的电子结构和稳定性.
结论:
- MOF模板合成是开发用于CO2RR和Li-CO2电池的高性能Cu/CeO2催化剂的有效策略.
- CeO2 (110) 方面在通过有利的电子相互作用优化催化剂性能方面发挥着关键作用.
- 开发的电催化剂和二氧化碳电池组件显示出有效利用二氧化碳和储能应用的巨大潜力.
相关概念视频
Interfacial Electrochemical Methods: Overview
286
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
286
Voltaic/Galvanic Cells
57.6K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
57.6K
Electrodeposition
669
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
669
Thermal and Photochemical Electrocyclic Reactions: Overview
2.4K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.4K
Batteries and Fuel Cells
27.6K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
27.6K
Formation of Complex Ions
23.7K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.7K


