在性介质中通过将异构原子添加到FeSA-NC催化剂中,有效且持久地减少氧气
Wenlin Zhang1, Shenghu Zhang1, Peng Guo1
1National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, PR China.
Journal of colloid and interface science
|May 15, 2024
概括
在催化剂中将引入单个铁 (Fe) 中心,可显著提高氧降解反应 (ORR) 和空气电池的电化学反应性,性能优于/碳 (Pt/C). 这种增强提高了催化剂的耐用性和效率.
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:
- 提高原子分散催化剂的电化学反应性对于能量转化反应至关重要.
- 调节金属中心的电子结构是一个关键的策略,但仍然具有挑战性.
- 单原子催化剂提供高原子利用率和可调节性质.
研究的目的:
- 通过引入异原子 (B) 来增强单个铁 (Fe) 催化剂的电化学活性.
- 调查兴奋剂对Fe单原子催化剂电子结构和催化性能的影响.
- 评估改性催化剂在氧降解反应 (ORR) 和空气电池中的性能.
主要方法:
- 合成嵌入-联合化碳 (FeSA-BNC) 的Fe单原子催化剂.
- 电化学表征,包括ORR活性和性介质中的耐久性测试.
- 在Zn-空气电池设置中的性能评估.
- 密度函数理论 (DFT) 计算,以了解电子结构的修改.
主要成果:
- FeSA-BNC催化剂表现出极好的ORR性能,其半波潜力 (E1/2) 为0.87V.
- 与商业Pt/C相比,催化剂在性介质中表现出优越的长期耐用性.
- 在Zn-空气电池中,FeSA-BNC与Pt/C相比表现更好.
- 理论计算证实了由于引入而导致Fe d带中心向下转移.
结论:
- 异原子兴奋剂有效调节单个Fe原子的电子结构,增强ORR活性.
- FeSA-BNC催化剂为ORR和储能应用提供了对Pt/C的有希望的替代方案.
- 兴奋剂促进了中间溶解,从而改善了氧降解反应动力学.
相关概念视频
Hydroboration-Oxidation of Alkenes
8.1K
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
8.1K
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
18.0K
Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
18.0K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
11.4K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
11.4K


