Eutectic salt mixture-assisted sodium-vapor-induced synthesis of Pt−Ca nanoparticles, their microstructural and electrocatalytic properties

2021 ◽  
Author(s):  
Hiroshi Itahara ◽  
Naoko Takahashi ◽  
Satoru Kosaka ◽  
Yasuhiro Takatani ◽  
Masanori Inaba ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Synthesis Method ◽  
Eutectic Mixture ◽  
Reduction Reaction ◽  
Sodium Vapor ◽  
Salt Mixture ◽  
Electrocatalytic Properties ◽  
Eutectic Salt

We have fabricated Pt−Ca nanoparticles with oxygen reduction reaction catalytic activity via a sodium vapor-induced synthesis method. Prior addition of NaCl to form a eutectic mixture of CaCl2 and NaCl...

Short-route synthesis method of N-doped exfoliated graphite whit catalytic activity for the oxygen reduction reaction.

MRS Advances ◽  
2020 ◽  
Vol 5 (57-58) ◽  
pp. 2939-2946
Author(s):  
Daniel Lardizábal-G. ◽  
I.L. Alonso-Lemus ◽  
L. de la Torre Saenz ◽  
A. Aguilar-Elguezabal ◽  
Ysmael Verde-Gómez
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Thermal Annealing ◽  
Synthesis Method ◽  
High Energy ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Exfoliated Graphite ◽  
Short Route

AbstractWe report the synthesis of metal-free nitrogen-doped electrocatalysts obtained from graphite and urea as carbon and nitrogen precursor, respectively. High-energy milling and thermal annealing were carried out to obtain low cost electrocatalysts. Additionally, this method has shorter synthesis times, is environmentally friendly and use high-availability raw materials. A short-route synthesis consisted in the partial exfoliation of graphite by mechanical milling with urea. Afterwards, nitrogen was integrated into the exfoliated graphite lattice by thermal annealing at 500°C. XPS analyses shows up to 1.7 at. % was incorporated to the graphitic lattice. Scanning Electron Microscopy, X-ray diffraction and Raman Spectroscopy were used to analyse the morphology and structural features. The catalytic activity for the oxygen reduction reaction in basic media was evaluated by the rotating disk electrode technique.

Scalable synthesis of bi-functional high-performance carbon nanotube sponge catalysts and electrodes with optimum C–N–Fe coordination for oxygen reduction reaction

2015 ◽  
Vol 8 (6) ◽  
pp. 1799-1807 ◽  
Author(s):  
Gang Yang ◽  
Woongchul Choi ◽  
Xiong Pu ◽  
Choongho Yu
Keyword(s):  
Catalytic Activity ◽  
Carbon Nanotube ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Performance ◽  
Synthesis Method ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Scalable Synthesis

Three-dimensional N/Fe-containing carbon nanotube sponges showing striking improvements in catalytic activity and stability were grown using a facile/scalable synthesis method.

Ferrocene-based porous organic polymer derived high-performance electrocatalysts for oxygen reduction

2017 ◽  
Vol 5 (42) ◽  
pp. 22163-22169 ◽  
Author(s):  
Baolong Zhou ◽  
Liangzhen Liu ◽  
Pingwei Cai ◽  
Guang Zeng ◽  
Xiaoqiang Li ◽  
...  
Keyword(s):  
Schiff Base ◽  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
High Performance ◽  
Reduction Reaction ◽  
Organic Polymer ◽  
Porous Organic Polymers ◽  
Porous Organic Polymer

Two nitrogen-rich porous organic polymers (POPs) were prepared via Schiff base chemistry. Carbonization of these POPs results in porous carbon nanohybrids which exhibit excellent catalytic activity toward the oxygen reduction reaction (ORR).

Insights into the Catalytic Activity of Barium Carbonate for Oxygen Reduction Reaction

2016 ◽  
Vol 120 (40) ◽  
pp. 22895-22902 ◽  
Author(s):  
Xuecheng Cao ◽  
Tao Hong ◽  
Ruizhi Yang ◽  
Jing-Hua Tian ◽  
Changrong Xia ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Barium Carbonate ◽  
Reduction Reaction

Engineering Mn Atomic Sites in Multi-Dimensional Nitrogen-Doped Carbon for Highly Efficient Oxygen Reduction Reaction

2022 ◽  
Author(s):  
Huixin Ma ◽  
Daijie Deng ◽  
Honghui Zhang ◽  
Feng Chen ◽  
Junchao Qian ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Single Atom ◽  
Two Dimensional ◽  
One Dimensional ◽  
Nitrogen Doped ◽  
Half Wave ◽  
Nitrogen Doped Carbon

Nitrogen-coordinated single-atom manganese in multi-dimensional nitrogen-doped carbon electrocatalysts (Mn-NC) was successful constructed by combing two-dimensional nanosheets and one-dimensional nanofibers. The Mn-NC exhibited excellent oxygen reduction reaction catalytic activity with half-wave...

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.

Catalytic Activity of Partially Oxidized Tantalum Carbonitride for Oxygen Reduction Reaction

2019 ◽  
Vol 16 (24) ◽  
pp. 125-132 ◽  
Author(s):  
Motoko Tamura ◽  
Akimitsu Ishihara ◽  
Tomoyuki Tada ◽  
Koichi Matsuzawa ◽  
Shigenori Mitsushima ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction

Electrocatalytic study of a 1,10-phenanthroline–cobalt(ii) metal complex catalyst supported on reduced graphene oxide towards oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (40) ◽  
pp. 33302-33307 ◽  
Author(s):  
Cancan Ren ◽  
Haibo Li ◽  
Rui Li ◽  
Shuling Xu ◽  
Denghu Wei ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Metal Complex ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduced Graphene Oxide ◽  
Reduction Reaction ◽  
Complex Catalyst ◽  
Reduced Graphene ◽  
High Efficient

1,10-Phenanthroline–cobalt(ii) metal-complex supported on rGO exhibited a high efficient four-electron catalytic activity towards ORR.

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