Boosting hydrogen evolution by using covalent frameworks of fluorinated cobalt porphyrins supported on carbon nanotubes

2019 ◽  
Vol 55 (84) ◽  
pp. 12647-12650 ◽  
Author(s):  
Gelun Xu ◽  
Haitao Lei ◽  
Guojun Zhou ◽  
Chaochao Zhang ◽  
Lisi Xie ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Cobalt Porphyrins

A covalent framework using fluorinated cobalt porphyrins is synthesized and shows significantly improved efficiency for the hydrogen evolution reaction in aqueous solution.

Morphological and reactive optimization of g-C3N4-derived Co,N-codoped carbon nanotubes for hydrogen evolution reaction

2021 ◽  
Vol 45 (14) ◽  
pp. 6308-6314
Author(s):  
Zhuochen Yu ◽  
Kaida Yao ◽  
Siqi Zhang ◽  
Yang Liu ◽  
Yueqiu Sun ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction

Scheme for the synthesis of bamboo-like N-doped carbon nanotubes.

scholarly journals A Supramolecular Porous Organic Cage Platform Promotes Electrochemical Hydrogen Evolution from Water Catalyzed by Cobalt Porphyrins

2021 ◽  
Author(s):  
Peter T. Smith ◽  
Bahiru Punja Benke ◽  
Lun An ◽  
Younghoon Kim ◽  
Kimoon Kim ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Supramolecular Structure ◽  
Fold Increase ◽  
Faradaic Efficiency ◽  
Tafel Slope ◽  
Neutral Ph ◽  
Catalyst Film ◽  
Electrochemically Active ◽  
Cobalt Porphyrins

We report a supramolecular porous organic cage platform composed of cobalt porphyrins for catalyzing the electrochemical hydrogen evolution reaction (HER) from water at neutral pH. Owing to its permanent porosity, the supramolecular structure yields a catalyst film with a 5-fold increase in the number of electrochemically active cobalt atoms and an improvement in Tafel slope from 170 mV/decade to 119 mV/decade compared to a planar cobalt porphyrin analog, reaching activities over 19,000 turnovers for HER over a 24-hour period with 100% Faradaic efficiency.

MoS2/Co9S8/MoC heterostructure connected by carbon nanotubes as electrocatalyst for efficient hydrogen evolution reaction

2021 ◽  
Vol 79 ◽  
pp. 29-34
Author(s):  
Meng Wang ◽  
Kailiang Jian ◽  
Zepeng Lv ◽  
Dong Li ◽  
Gangqiang Fan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction
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