协调不和的IrC3为高效的甲醇氧化反应的单原子催化剂.
Liyuan Gong1,2, Yabin Xu1, Shurui Gao3
1State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, the National Supercomputer Centers in Changsha, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha, China.
一种具有IrC3位点的新型单个 (Ir) 原子催化剂在高温下提高了甲醇氧化反应 (MOR) 的效率. 这种催化剂增强了甲醇吸附,并促进了CO氧化,克服了生产的关键动态限制.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 可再生能源可再生能源是可再生能源.
背景情况:
- 甲醇氧化反应 (MOR) 对于能量转化至关重要,但由于缓慢的动力学,特别是CO氧化而受到阻碍.
- 强烈的二氧化碳吸附和活动地点的有限的基 (OH) 物种阻碍了MOR的效率.
研究的目的:
- 开发一个具有IrC3位点的单一Ir原子催化剂,以在高温下高效地对MOR进行电催化.
- 为了应对CO中毒和MOR中不足的OH物种的挑战.
主要方法:
- 开发具有协调性不和IrC3位点的单个Ir原子催化剂.
- 在高温下使用高温聚合物电解质膜电解剂 (HT-PEME) 进行MOR的电催化.
- 分析甲醇和二氧化碳吸附能量和电化学水解离.
主要成果:
- 在IrC3位点表现出更强的甲醇吸附和较弱的CO吸附,打破了缩放关系.
- 通过IrC3和IrC4位点加速电化学水解离产生丰富的OH物种.
- 催化剂在180°C时实现了0.05V的启动电位和高H2生成率 (8694 molH2 molIr-1 h-1).
结论:
- 开发的IrC3单原子催化剂通过平衡吸附能量并提供充足的*OH物种,显著提高了MOR动力学.
- 这种催化剂在HT-PEME中表现出比传统的Ir-C和Pt/C催化剂更好的性能.
- 这些发现提供了一个有希望的战略,通过MOR通过高效的利用.
更多相关视频
09:37Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
10:57Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
相关概念视频
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
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...
Alkenes via Reductive Coupling of Aldehydes or Ketones: McMurry Reaction
Hydroboration-Oxidation of Alkenes
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
Preparation of Alcohols via Addition Reactions
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
Radical Oxidation of Allylic and Benzylic Alcohols
