Mechanistic Insight into Catalytic Oxidation of Ammonia on Clean, O- and OH-Assisted Ir(1 1 1) Surfaces

ChemCatChem ◽  
2013 ◽  
Vol 5 (7) ◽  
pp. 1832-1841 ◽  
Author(s):  
Xiaoqing Lu ◽  
Zhigang Deng ◽  
Ka-Shing Chau ◽  
Longfei Li ◽  
Zengqiang Wen ◽  
...  
2019 ◽  
Author(s):  
Mahdi Raghibi Boroujeni ◽  
Christine Greene ◽  
Jeffery A. Bertke ◽  
Timothy H. Warren

Recognizing the potential of ammonia to serve as a carbon-free fuel, we describe an electrocatalytic system for the oxidation of ammonia based on ferrocene (Cp<sub>2</sub>Fe), an inexpensive, robust catalyst utilizing Earth-abundant iron. Ferrocenium (Cp<sub>2</sub>Fe<sup>+</sup>), the 1-electron oxidized form of ferrocene, cleanly oxidizes ammonia to generate nitrogen gas (N<sub>2</sub>) and protons captured by excess ammonia as NH<sub>4</sub><sup>+ </sup>with electrons reducing ferrocenium to ferrocene. This process occurs under electrocatalytic conditions to generate N<sub>2 </sub>with sustained current. Simple modification of ferrocene through sulfonation allows for solubility in liquid ammonia to enable electrocatalysis in highly concentrated, energy dense solutions of ammonia. Kinetic and computational analysis provides mechanistic insight into the oxidation of ammonia by ferrocenium.


2013 ◽  
Vol 19 (30) ◽  
pp. 9818-9824 ◽  
Author(s):  
Xixian Yang ◽  
Hongjuan Wang ◽  
Jing Li ◽  
Wenxu Zheng ◽  
Rong Xiang ◽  
...  

Fuel ◽  
2019 ◽  
Vol 253 ◽  
pp. 1531-1544 ◽  
Author(s):  
Yanan Tang ◽  
Weiguang Chen ◽  
Jincheng Zhou ◽  
Huadou Chai ◽  
Yi Li ◽  
...  

Author(s):  
Mahdi Raghibi Boroujeni ◽  
Christine Greene ◽  
Jeffery A. Bertke ◽  
Timothy H. Warren

Recognizing the potential of ammonia to serve as a carbon-free fuel, we describe an electrocatalytic system for the oxidation of ammonia based on ferrocene (Cp<sub>2</sub>Fe), an inexpensive, robust catalyst utilizing Earth-abundant iron. Ferrocenium (Cp<sub>2</sub>Fe<sup>+</sup>), the 1-electron oxidized form of ferrocene, cleanly oxidizes ammonia to generate nitrogen gas (N<sub>2</sub>) and protons captured by excess ammonia as NH<sub>4</sub><sup>+ </sup>with electrons reducing ferrocenium to ferrocene. This process occurs under electrocatalytic conditions to generate N<sub>2 </sub>with sustained current. Simple modification of ferrocene through sulfonation allows for solubility in liquid ammonia to enable electrocatalysis in highly concentrated, energy dense solutions of ammonia. Kinetic and computational analysis provides mechanistic insight into the oxidation of ammonia by ferrocenium.


RSC Advances ◽  
2021 ◽  
Vol 11 (34) ◽  
pp. 20961-20969
Author(s):  
Yunqing He ◽  
Wanli Nie ◽  
Ying Xue ◽  
Qishan Hu

Hydrosilylation or amination products? It depends on water amount and nucleophiles like excess water or produced/added amines.


2021 ◽  
Vol 154 (12) ◽  
pp. 124313
Author(s):  
L. M. Hunnisett ◽  
P. F. Kelly ◽  
S. Bleay ◽  
F. Plasser ◽  
R. King ◽  
...  

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