在质子陶电化学电池上,用于可逆氧降解/演化和乙烯电产的高效电极
Yangsen Xu1, Kang Xu1, Hua Zhang1
1School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
Science bulletin
|September 14, 2024
概括
一种新型的联合合PrBaCo2O6-δ电极材料 (PBCCN) 提高了质子陶电化学电池 (PCEC) 性能,用于发电和化学合成. 这一突破为先进的能源应用提供了更好的动力学和稳定性.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 质子陶电化学电池 (PCEC) 显示出对能源和化学生产的前景.
- 提高电极动力学和稳定性仍然是PCEC技术的一个关键挑战.
研究的目的:
- 开发一种用于PCECs的新型联合合电极材料.
- 为了研究材料在燃料电池和电解模式中的性能.
- 评估其在从乙中合成乙烯的电化学合成中的应用.
主要方法:
- 将PrBaCo2O6-δ与 (Cs) 和 (Nb) 进行联合剂,以产生PrBa0.9Cs0.1Co1.9Nb0.1O6-δ (PBCCN).
- 使用X射线光电子光谱和电导度放松,对双相PBCCN (DP-PBCCN和SP-BCCN) 的表征.
- 在燃料电池 (FC) 和电解电池 (EC) 模式的性能测试,以及乙脱.
主要成果:
- PBCCN表现出较低的面积特异性电阻 (0.107 Ω cm2).
- 在FC模式下达到2.04W cm−2,在EC模式下达到1.3V时达到-2.84A cm−2.
- 证明了212小时以上的可逆耐用性和12.75%的乙转化,具有98.4%的乙烯选择性.
结论:
- 与Cs和Nb联合使用可显著提高PCEC电极性能和稳定性.
- 双相PBCCN材料对能量转换和化学合成应用都有效.
- 这一发展为更高效,更耐用的PCEC设备铺平了道路.
相关概念视频
Electrodeposition
612
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...
612
Electrolysis
26.2K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.2K
Standard Electrode Potentials
43.5K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
43.5K
Batteries and Fuel Cells
27.1K
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...
27.1K
Voltaic/Galvanic Cells
56.9K
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,...
56.9K
Electrodes: Overview
1.3K
Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in...
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in...
1.3K


