Fe3O4/Fe2O3/Fe nanoparticles anchored on N-doped hierarchically porous carbon nanospheres as high-‍efficiency ORR electrocatalysts for rechargeable Zn-air batteries

2020 ◽  
Author(s):  
Yali Wang ◽  
Ruihui Gan ◽  
Hao Liu ◽  
Mahmut Dirican ◽  
Chengbiao Wei ◽  
...  
Keyword(s):  
Transition Metal ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
Precious Metal ◽  
High Efficiency ◽  
Reduction Reaction ◽  
Carbon Nanospheres ◽  
Fe Nanoparticles ◽  
Porous Carbon Nanospheres

The advancement of electrocatalysts using non-precious metal with excellent catalytic ability and durability for oxygen reduction reaction (ORR) remains an enormous challenge. Transition metal-nitrogen-carbon (M-N-C) materials become target products with...

Promoting interfacial charge transfer by B/N co-doping enable efficient ORR catalysis of carbon encapsulated Fe2N

2022 ◽  
Author(s):  
Zhi Xie ◽  
Qiaoling Li ◽  
Xingkai Peng ◽  
Xuewei Wang ◽  
Lingli Guo ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
High Efficiency ◽  
Reduction Reaction ◽  
Carbon Shell ◽  
Co Doping ◽  
Interfacial Charge ◽  
Electrochemical Catalysts

High efficiency and durability are two key targets for developing electrochemical catalysts for oxygen reduction reaction (ORR). Here, B/N co-doping porous carbon shell encapsulated Fe2N nanoparticles (NPs) was synthesized as...

Graphene supported non-precious metal-macrocycle catalysts for oxygen reduction reaction in fuel cells

Nanoscale ◽  
2015 ◽  
Vol 7 (16) ◽  
pp. 6991-6998 ◽  
Author(s):  
Hyun-Jung Choi ◽  
Nanjundan Ashok Kumar ◽  
Jong-Beom Baek
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Precious Metal ◽  
Alternative Energy ◽  
High Efficiency ◽  
Reduction Reaction ◽  
Promising Alternative ◽  
Energy Devices

Fuel cells are promising alternative energy devices owing to their high efficiency and eco-friendliness.

Recent Advances on Non-precious Metal Porous Carbon-based Electrocatalysts for Oxygen Reduction Reaction

2018 ◽  
Vol 5 (14) ◽  
pp. 1775-1785 ◽  
Author(s):  
Dongdong Liu ◽  
Li Tao ◽  
Dafeng Yan ◽  
Yuqin Zou ◽  
Shuangyin Wang
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
Precious Metal ◽  
Reduction Reaction ◽  
Recent Advances ◽  
Carbon Based

Effect of transition metal (M: Fe, Co or Mn) for the oxygen reduction reaction with non-precious metal catalysts in acid medium

2014 ◽  
Vol 39 (10) ◽  
pp. 5309-5318 ◽  
Author(s):  
C. Domínguez ◽  
F.J. Pérez-Alonso ◽  
M. Abdel Salam ◽  
J.L. Gómez de la Fuente ◽  
S.A. Al-Thabaiti ◽  
...  
Keyword(s):  
Transition Metal ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Acid Medium ◽  
Precious Metal ◽  
Reduction Reaction ◽  
Metal Catalysts ◽  
Precious Metal Catalysts

scholarly journals First-row Transition Metal Antimonates for the Oxygen Reduction Reaction

2021 ◽  
Author(s):  
G. T. Kasun Kalhara Gunasooriya ◽  
Melissa E. Kreider ◽  
Yunzhi Liu ◽  
José A. Zamora Zeledón ◽  
Zhenbin Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Precious Metal ◽  
Active Sites ◽  
Reduction Reaction ◽  
Oxygen Binding ◽  
Precious Metal Catalysts ◽  
Mass Activity

The development of inexpensive and abundant catalysts with high activity, selectivity, and stability for the oxygen reduction reaction (ORR) is imperative for the widespread implementation of fuel cell devices. Herein, we present a combined theoretical-experimental approach to discover and design first-row transition metal antimonates as promising electrocatalytic materials for the ORR. Theoretically, we identify first-row transition metal antimonates – MSb2O6, where M = Mn, Fe, Co, and Ni – as non-precious metal catalysts with promising oxygen binding energetics, conductivity, thermodynamic phase stability and aqueous stability. Among the considered antimonates, MnSb2O6 shows the highest theoretical ORR activity based on the 4e− ORR kinetic volcano. Experimentally, nanoparticulate transition metal antimonate catalysts are found to have a minimum of a 2.5-fold enhancement in intrinsic mass activity (on transition metal mass basis) relative to the corresponding transition metal oxide at 0.7 V vs RHE in 0.1 M KOH. MnSb2O6 is the most active catalyst under these conditions, with a 3.5-fold enhancement on a per Mn mass activity basis and 25-fold enhancement on a surface area basis over its antimony-free counterpart. Electrocatalytic and material stability are demonstrated over a 5 h chronopotentiometry experiment in the stability window identified by Pourbaix analysis. This study further highlights the stable and electrically conductive antimonate structure as a promising framework to tune the activity and selectivity of non-precious metal oxide active sites for ORR catalysis.

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