Three-steps method with self-sacrificial Co to prepare uniform 5 nm-scale Pt catalyst for the oxygen reduction reaction

2021 ◽  
Author(s):  
Donggang Li ◽  
Yanlong Gong ◽  
Gen Li ◽  
Xiao Lyu ◽  
Zhenqing Dai ◽  
...  
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Pt Catalyst

The catalytic activity of Pt-based catalysts for fuel cells is largely determined by the particle size and the dispersion of Pt. Normally, the electrodeposition of Pt can not avoid large...

Particle size-control enables extraordinary activity of ruthenium nanoparticles/multiwalled carbon nanotube catalysts towards the oxygen reduction reaction

Nanoscale ◽  
2019 ◽  
Vol 11 (29) ◽  
pp. 13968-13976 ◽  
Author(s):  
Chang Liu ◽  
Gailing Bai ◽  
Zhifeng Jiao ◽  
Baoying Lv ◽  
Yunwei Wang ◽  
...  
Keyword(s):  
Particle Size ◽  
Fuel Cells ◽  
Carbon Nanotube ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Size Control ◽  
Reduction Reaction ◽  
Optimal Size ◽  
Ruthenium Nanoparticles ◽  
Multiwalled Carbon

Catalysts with optimal size for the oxygen reduction reaction (ORR) play a vital important role in fuel cells and metal–air batteries.

One-pot synthesis of Co/N-doped mesoporous graphene with embedded Co/CoOx nanoparticles for efficient oxygen reduction reaction

Nanoscale ◽  
2017 ◽  
Vol 9 (29) ◽  
pp. 10233-10239 ◽  
Author(s):  
Yanli Niu ◽  
Xiaoqin Huang ◽  
Xiaoshuai Wu ◽  
Lei Zhao ◽  
Weihua Hu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
High Catalytic Activity ◽  
One Pot ◽  
One Pot Synthesis

Exploration of sustainable electrocatalysts toward oxygen reduction reaction (ORR) with high catalytic activity remains a key challenge in the development of metal–air batteries and fuel cells.

Enhancing Oxygen Reduction Reaction Activity of α-MnO2 Nanowires Through Ag Doping

NANO ◽  
2020 ◽  
Vol 15 (09) ◽  
pp. 2050115
Author(s):  
Zixu Wu ◽  
Guangxing Li ◽  
Qin Liao ◽  
Ruida Ding ◽  
Xuze Zuo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Manganese Oxide ◽  
Oxygen Reduction ◽  
High Performance ◽  
Large Scale ◽  
Reaction Pathway ◽  
Reduction Reaction ◽  
Ag Doping

Enhancing the catalytic activity of manganese oxide in oxygen reduction reaction (ORR) is a key issue for its large-scale application in metal-air fuel cells. Ag-doped [Formula: see text]-MnO2 nanowires without Ag or Ag2O have been successfully synthesized via a facile hydrothermal method, and the changes in both the structure and electrochemical catalytic performances after Ag doping are investigated. Compared with the pristine [Formula: see text]-MnO2, the as-prepared Ag-doped MnO2 exhibits a significantly enhanced catalytic activity in both ORR and Mg-air fuel cell application. With Ag/Mn ratio of 1:25, Ag-doped MnO2 exhibits a typical 4e-reaction pathway and presents a 163 mV higher half-wave potential than that of the pristine [Formula: see text]-MnO2. Furthermore, it demonstrates a power density of 75.1[Formula: see text]mW[Formula: see text]cm[Formula: see text] at current density of 134.5[Formula: see text]mA[Formula: see text]cm[Formula: see text] in the Mg-air fuel cells. The enhanced ORR performances are considered to be contributed from the activation of surface lattice oxygen, the improvement in conductivity and the increase in oxygen vacancies of [Formula: see text]-MnO2. These findings provide new understanding for developing high-performance manganese oxide catalysts.

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