A C‐S‐C linkage‐triggered ultrahigh nitrogen‐doped carbon and identification of active site in triiodide reduction

2020 ◽  
Author(s):  
Jiangwei Chang ◽  
Chang Yu ◽  
Xuedan Song ◽  
Xinyi Tan ◽  
Yiwang Ding ◽  
...  
Keyword(s):  
Active Site ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

scholarly journals Electrochemical estimation of active site density on a metal-free carbon-based catalyst

RSC Advances ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 466-475 ◽  
Author(s):  
Arup Chakraborty ◽  
Bapi Bera ◽  
Divya Priyadarshani ◽  
Pradipkumar Leuaa ◽  
Debittree Choudhury ◽  
...  
Keyword(s):  
Active Site ◽  
Free Carbon ◽  
Adsorption Method ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Site Density ◽  
Nitrogen Doped Carbon ◽  
Carbon Based

Estimated ESA of nitrogen-doped carbon and carbon using AQS-adsorption method.

scholarly journals Unveiling the Active Site of Metal-Free Nitrogen-doped Carbon for Electrocatalytic Carbon Dioxide Reduction

2020 ◽  
Vol 1 (8) ◽  
pp. 100145 ◽  
Author(s):  
Zheng Zhang ◽  
Liang Yu ◽  
Yunchuan Tu ◽  
Ruixue Chen ◽  
Lihui Wu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Active Site ◽  
Carbon Dioxide Reduction ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Nitrogen Doped Carbon

Electrochemical estimation of the active site density on metal-free nitrogen-doped carbon using catechol as an adsorbate

2017 ◽  
Vol 19 (37) ◽  
pp. 25414-25422 ◽  
Author(s):  
Arup Chakraborty ◽  
Ruttala Devivaraprasad ◽  
Bapi Bera ◽  
Manoj Neergat
Keyword(s):  
Active Site ◽  
Electrochemical Method ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Site Density ◽  
Nitrogen Doped Carbon

An electrochemical method to estimate the active site density of metal-free electrocatalysts using catechol adsorption.

scholarly journals A pyridinic Fe-N4 macrocycle models the active sites in Fe/N-doped carbon electrocatalysts

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Travis Marshall-Roth ◽  
Nicole J. Libretto ◽  
Alexandra T. Wrobel ◽  
Kevin J. Anderton ◽  
Michael L. Pegis ◽  
...  
Keyword(s):  
Active Site ◽  
Active Sites ◽  
Catalytic Properties ◽  
Molecular Model ◽  
Reduction Reaction ◽  
Electrochemical Studies ◽  
Onset Potential ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
Excellent Selectivity

Abstract Iron- and nitrogen-doped carbon (Fe-N-C) materials are leading candidates to replace platinum catalysts for the oxygen reduction reaction (ORR) in fuel cells; however, their active site structures remain poorly understood. A leading postulate is that the iron-containing active sites exist primarily in a pyridinic Fe-N4 ligation environment, yet, molecular model catalysts generally feature pyrrolic coordination. Herein, we report a molecular pyridinic hexaazacyclophane macrocycle, (phen2N2)Fe, and compare its spectroscopic, electrochemical, and catalytic properties for ORR to a typical Fe-N-C material and prototypical pyrrolic iron macrocycles. N 1s XPS and XAS signatures for (phen2N2)Fe are remarkably similar to those of Fe-N-C. Electrochemical studies reveal that (phen2N2)Fe has a relatively high Fe(III/II) potential with a correlated ORR onset potential within 150 mV of Fe-N-C. Unlike the pyrrolic macrocycles, (phen2N2)Fe displays excellent selectivity for four-electron ORR, comparable to Fe-N-C materials. The aggregate spectroscopic and electrochemical data demonstrate that (phen2N2)Fe is a more effective model of Fe-N-C active sites relative to the pyrrolic iron macrocycles, thereby establishing a new molecular platform that can aid understanding of this important class of catalytic materials.

The role of pre-defined microporosity in catalytic site formation for the oxygen reduction reaction in iron- and nitrogen-doped carbon materials

2017 ◽  
Vol 5 (8) ◽  
pp. 4199-4206 ◽  
Author(s):  
Minhyoung Kim ◽  
Hee Soo Kim ◽  
Sung Jong Yoo ◽  
Won Cheol Yoo ◽  
Yung-Eun Sung
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Site ◽  
Carbon Materials ◽  
Carbon Support ◽  
Reduction Reaction ◽  
Site Formation ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

We investigated the carbon support microporosity effect on active site formation for the oxygen reduction reaction in Fe–N–C catalysts.

scholarly journals Frontispiz: A C‐S‐C Linkage‐Triggered Ultrahigh Nitrogen‐Doped Carbon and the Identification of Active Site in Triiodide Reduction

2021 ◽  
Vol 133 (7) ◽  
Author(s):  
Jiangwei Chang ◽  
Chang Yu ◽  
Xuedan Song ◽  
Xinyi Tan ◽  
Yiwang Ding ◽  
...  
Keyword(s):  
Active Site ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon
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