Unification of catalytic oxygen reduction and hydrogen evolution reactions: highly dispersive Co nanoparticles encapsulated inside Co and nitrogen co-doped carbon

2015 ◽  
Vol 51 (43) ◽  
pp. 8942-8945 ◽  
Author(s):  
Y. Wang ◽  
Y. Nie ◽  
W. Ding ◽  
S. G. Chen ◽  
K. Xiong ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Homogenous Distribution ◽  
Hydrogen Evolution Reactions ◽  
Co Nanoparticles ◽  
Carbon Catalysts ◽  
Co Doped

The elaborately synthesized Co nanoparticles encapsulated inside Co and nitrogen co-doped carbon catalysts with homogenous distribution of Co NPs exhibit evidently outstanding performances toward ORR/HER.

Cobalt and Nitrogen Co-Doped Tungsten Carbide Catalyst for Oxygen Reduction and Hydrogen Evolution Reactions

2016 ◽  
Vol 190 ◽  
pp. 1113-1123 ◽  
Author(s):  
Saheed Bukola ◽  
Belabbes Merzougui ◽  
Akeem Akinpelu ◽  
Mostafa Zeama
Keyword(s):  
Tungsten Carbide ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reactions ◽  
Co Doped

scholarly journals Cobalt/nitrogen codoped carbon nanosheets derived from catkins as a high performance non-noble metal electrocatalyst for oxygen reduction reaction and hydrogen evolution reaction

RSC Advances ◽  
2020 ◽  
Vol 10 (71) ◽  
pp. 43248-43255
Author(s):  
Luting Song ◽  
Jinquan Chang ◽  
Yanhong Ma ◽  
Xinghua Tan ◽  
Yuanqing Xu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Hydrogen Evolution Reaction ◽  
High Performance ◽  
Reduction Reaction ◽  
Carbon Nanosheets ◽  
Hydrogen Evolution Reactions ◽  
Co Doped

We prepare highly efficient NPM catalysts of cobalt and nitrogen co-doped carbon nanosheets for oxygen reduction and hydrogen evolution reactions using catkin biomass.

scholarly journals Effect of Pyrolysis Conditions on the Performance of Co–Doped MOF–Derived Carbon Catalysts for Oxygen Reduction Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1163
Author(s):  
Ning Cui ◽  
Kexiao Bi ◽  
Wei Sun ◽  
Qianqian Wu ◽  
Yinan Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Heating Rate ◽  
Reduction Reaction ◽  
Half Wave ◽  
Step Heating ◽  
The Stability ◽  
Carbon Catalysts ◽  
Co Doped

MOF–derived porous carbon is a type of promising catalyst to replace expensive Pt–based catalysts for oxygen reduction reaction (ORR). The catalytic activity for ORR depends closely on pyrolysis conditions. In this work, a Co–doped ZIF–8 material was chosen as a research object. The effect of pyrolysis conditions (temperature, heating rate, two–step heating) on the ORR performance of ZIF–derived carbon catalysts was systematically studied. The Co–ZIF–8 catalyst carbonized at 900 °C exhibits better ORR catalytic activity than that carbonized at 800 °C and 1000 °C. Moreover, a low heating rate can enhance catalytic activity. Two–step pyrolysis is proven to be an effective way to improve the performance of catalysts. Reducing the heating rate in the low–temperature stage is more beneficial to the ORR performance, compared to the heating rate in the high–temperature stage. The results show that the Co–ZIF–8 catalyst exhibits the best performance when the precursor was heated to 350 °C at 2 °C/min, and then heated to 900 °C at 5 °C/min. The optimum Co–ZIF–8 catalyst shows a half–wave potential of 0.82 V and a current density of 5.2 mA·cm−2 in 0.1 M KOH solution. It also exhibits high content of defects and good graphitization. TEM mapping shows that Co and N atoms are highly dispersed in the polyhedral carbon skeleton. However, two–step pyrolysis has no significant effect on the stability of the catalyst.

MOF-derived electrocatalysts for oxygen reduction, oxygen evolution and hydrogen evolution reactions

2020 ◽  
Vol 49 (5) ◽  
pp. 1414-1448 ◽  
Author(s):  
Hao-Fan Wang ◽  
Liyu Chen ◽  
Huan Pang ◽  
Stefan Kaskel ◽  
Qiang Xu
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Composition Design ◽  
Hydrogen Evolution Reactions ◽  
Carbon Based

The morphology and composition design of MOF-derived carbon-based materials and their applications for electrocatalytic ORR, OER and HER are reviewed.

Metallic single-atoms confined in carbon nanomaterials for the electrocatalysis of oxygen reduction, oxygen evolution, and hydrogen evolution reactions

2020 ◽  
Vol 10 (19) ◽  
pp. 6420-6448 ◽  
Author(s):  
Mohd. Khalid ◽  
Prerna A. Bhardwaj ◽  
Ana M. B. Honorato ◽  
Hamilton Varela
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Carbon Nanomaterials ◽  
Review Article ◽  
Single Atom ◽  
Single Atoms ◽  
Recent Advances ◽  
Hydrogen Evolution Reactions

Recent advances of single-atom-based carbon nanomaterials for the ORR, OER, HER, and bifunctional electrocatalysis are covered in this review article.

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