可充电的Zn-H2O水解电池用于的储存和生产
Muya Cai1,2, Hao Shi1,2, Yu Zhang1,2
1School of Resource and Environmental Science, Wuhan University, 299 Bayi Road, Wuchang District, Wuhan, 430072, P. R. China.
Angewandte Chemie (International ed. in English)
|April 25, 2024
概括
这项研究引入了一种新的介导系统,通过水分解有效生产气. 该方法提供了一种可持续和高效的途径,可在需求时产生气,能量损耗最小.
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 反应性金属水解对储存具有前景,但在金属再生和副产品形成方面面临挑战.
- 目前用于再生Mg和Al等金属的方法耗费大量能量,并产生不必要的副产品 (CO2,Cl2).
研究的目的:
- 开发一种高效和可持续的生产方法,使用反应性金属介质.
- 通过使用作为可回收的介质来克服传统反应性金属水解的局限性.
- 为了研究-水水解电池系统的性能和效率.
主要方法:
- 利用作为水分裂的反应媒介.
- 在溶液中构建了一个-水水解电池,其中有一个阳极和Raney-Nickel阴极.
- 采用电解来再生氧化,具有>99.9%的法拉第效率.
- 进行了DFT计算,以了解进化的动力学.
主要成果:
- 在80°C和50 mA cm−2.2.的两步水分裂过程中实现了70.4%的净能效.
- 经过600个周期的稳定生产,能源效率损失仅为3.76%.
- 与相比,DFT计算表明Raney-Nickel上的溶解速度更快.
- 一个24Ah电解仪原型实现了65.5%的净能效,用于生产气.
结论:
- 开发的介导系统为生产提供了一个高效和可持续的途径.
- 该系统的高效率,可回收性和稳定性使其成为实际气生产的有希望的技术.
- 可再生能源的整合允许按需生产气,解决能源储存的关键挑战.
相关概念视频
03:12Batteries and Fuel Cells
27.3K
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...
27.3K
03:00Electrolysis
26.3K
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...
26.3K
03:02Standard Electrode Potentials
43.8K
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...
43.8K
02:13Reduction of Alkenes: Catalytic Hydrogenation
12.0K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
12.0K
00:26Hydrogen Bonds
121.2K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
121.2K
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.3K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.3K