从无处不在的空气和水中合成绿色氨的双功能催化剂
Rui Gao1, Tian-Yi Dai1, Zhe Meng1
1Key Laboratory of Automobile Materials, Ministry of Education, School of Materials Science and Engineering, Jilin University, Changchun, 130022, China.
Advanced materials (Deerfield Beach, Fla.)
|June 26, 2023
概括
这项研究引入了一种新的等离子电催化系统,用于从空气和水中产生绿色氨. 该系统使用双功能催化剂,实现高氨产率和高效的储存解决方案.
科学领域:
- 催化剂是一种催化剂.
- 电化学 电化学 电化学
- 血科学是一门科学课.
- 绿色化学 绿色化学
背景情况:
- 氨 (NH3) 对农业和工业至关重要.
- 氨是一种有前途的无碳能源载体,由于其高密度.
- 目前的氨生产方法是能源密集型的,依赖于化石燃料.
研究的目的:
- 开发一种新的等离子电催化系统,用于从空气和水中直接生产氨.
- 在这个系统中研究双功能CuCo2O4/Ni催化剂的性能.
- 为了实现高氨产率,并探索高效的储存方法.
主要方法:
- 建立了一个两步的等离子-电催化反应系统,将等离子-空气-NOx和电化学NOx减排 (eNOx RR) 结合起来.
- 一个双功能CuCo2O4/Ni催化剂被合成并用于促进两个反应步骤.
- 一个扩大的H型电解仪被用来扩大氨产量.
主要成果:
- CuCo2O4/Ni催化剂通过促进O2吸附/激活和解决*NO过度结合,有效地促进了血空气到NOx和eNOxRR步骤.
- 该系统实现了96.8%的卓越法拉代克效率 (FE_NH3) 和145.8毫克小时-1厘米-2.2的创纪录的氨产率.
- 氨产量进一步提高到3.6gh-1在放大电解仪中,并转化为固体氨酸六水合物用于储存.
结论:
- 开发的等离子电催化系统为直接从空气和水中生产氨提供了一个高效和绿色的途径.
- 双功能CuCo2O4/Ni催化剂在提高反应速度和效率方面发挥着至关重要的作用.
- 成功转换为固体储存形式证明了这种氨生产技术的实际潜力.
相关概念视频
Preparation of 1° Amines: Gabriel Synthesis
3.6K
Direct alkylation is not a suitable method for synthesizing amines because it produces polyalkylated products. Gabriel synthesis is the most preferred method to exclusively make primary amines. The method uses phthalimide, which contains a protected form of nitrogen that participates in alkylation only once to predominantly give primary amines.
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
3.6K
Catalysis
27.1K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
27.1K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.4K
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...
3.4K
Preparation of Amines: Reductive Amination of Aldehydes and Ketones
2.9K
Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
2.9K
Preparation of Amines: Alkylation of Ammonia and Amines
3.4K
Alkylation is one of the methods used to prepare amines. Direct alkylation of ammonia or a primary amine with an alkyl halide gives polyalkylated amines along with a quaternary ammonium salt through successive SN2 reactions. This process of making the quaternary salt through the direct alkylation method is called exhaustive alkylation.
Each alkylation step makes the nitrogen center more nucleophilic, which triggers successive alkylations until a quaternary ammonium salt is formed. Considering...
Each alkylation step makes the nitrogen center more nucleophilic, which triggers successive alkylations until a quaternary ammonium salt is formed. Considering...
3.4K
Inorganic Nitrogen Assimilation
49
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
49


