酸盐转化为氨,由胺尿素协调金属分子电催化剂与d-π结合转化为氨
Xue-Bo Liu1, Rui Zhao1, Min-Min Xu1
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, P. R. China.
研究人员开发了一种简单的,单步合成基于Cu的分子电催化剂 (Cu-ATU),用于将酸盐减少为氨. ATU表现出卓越的性能,为传统氨生产方法提供了有希望的替代方案.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 将酸盐电化学还原为氨 (NO3RR) 是哈伯-博什工艺的一个有吸引力的替代方案.
- 分子电催化剂对NO3RR显示出希望,但基于Cu的催化剂在合成,稳定性和溶剂使用方面面临挑战.
- 为NO3RR开发高效和稳定的基于Cu的分子催化剂仍然是一个重大的研究挑战.
研究的目的:
- 为d-π-结合分子电催化剂开发一种简单的合成策略.
- 调查新型金属胺基尿素 (M-ATU) 催化剂,特别是Cu-ATU的NO3RR性能.
- 阐明-ATU在NO3RR中的催化机制,并将其与Ni-ATU进行比较.
主要方法:
- 使用非有机溶剂制备M-ATU分子电催化剂的一步合成策略.
- 电化学表征包括氨产率和法拉第效率测量在各种潜力.
- 计算分析以了解电子结构和反应机制,重点关注*NO中间体.
主要成果:
- 具有Cu-N2S2协调的Cu-ATU显示出优异的NO3RR活性 (159.8 mg h-1 mgcat-1在-1.54 V) 和高的法拉第效率 (91.7%在-1.34 V).
- Cu-ATU显著优于之前报告的NO3RR的分子催化剂.
- 机制研究表明,Cu-ATU通过增强电子转移到*NO中间体,削弱NO键和降低激活能量来促进酸盐的减少.
结论:
- 建立了一种简单,环保的方法来合成高性能基于Cu的分子电催化剂 (Cu-ATU).
- -ATU对NO3RR表现出极高的活性和选择性,超过现有的分子催化剂.
- 这项工作为分子电催化剂的催化行为提供了基本的洞察力,用于酸盐降解,为工业应用铺平了道路.
更多相关视频
10:57Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
08:05Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
相关概念视频
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism
Electrophilic Aromatic Substitution: Nitration of Benzene
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
Preparation of Amines: Reduction of Oximes and Nitro Compounds
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
EDTA: Auxiliary Complexing Reagents
Preparation of Amines: Reduction of Amides and Nitriles
Amides can be reduced to primary, secondary, and tertiary amines using catalytic hydrogenation, active metals like Fe,...
