Atomic-Level Co3O4 Layer Stabilized by Metallic Cobalt Nanoparticles: A Highly Active and Stable Electrocatalyst for Oxygen Reduction

2018 ◽  
Vol 10 (8) ◽  
pp. 7052-7060 ◽  
Author(s):  
Min Liu ◽  
Jingjun Liu ◽  
Zhilin Li ◽  
Feng Wang
Keyword(s):  
Oxygen Reduction ◽  
Cobalt Nanoparticles ◽  
Atomic Level ◽  
Metallic Cobalt ◽  
Highly Active

Metallic cobalt encapsulated in N-doped carbon nanowires: a highly active bifunctional catalyst for oxygen reduction and evolution

Ionics ◽  
2021 ◽  
Author(s):  
Qingqing Wang ◽  
Xiaohong Gao ◽  
Xiaobao Li ◽  
Chenghang You ◽  
Chongtai Wang ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Bifunctional Catalyst ◽  
Metallic Cobalt ◽  
Highly Active ◽  
Carbon Nanowires

Metallic cobalt nanoparticles embedded in sulfur and nitrogen co-doped rambutan-like nanocarbons for the oxygen reduction reaction under both acidic and alkaline conditions

2019 ◽  
Vol 7 (23) ◽  
pp. 14291-14301 ◽  
Author(s):  
Jinyuan Liu ◽  
Li Xu ◽  
Yilin Deng ◽  
Xingwang Zhu ◽  
Jiujun Deng ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Cobalt Nanoparticles ◽  
Metallic Cobalt ◽  
Alkaline Conditions ◽  
Diffusion Paths ◽  
Co Doped ◽  
Carbon Based

Designing the porosity of functionalized rambutan-like carbon based materials can shorten the diffusion paths of oxygen to facilitate the oxygen reduction reaction.

Theoretical Modelling and Facile Synthesis of a Highly Active Boron-Doped Palladium Catalyst for the Oxygen Reduction Reaction

2016 ◽  
Vol 55 (24) ◽  
pp. 6842-6847 ◽  
Author(s):  
Tat Thang Vo Doan ◽  
Jingbo Wang ◽  
Kee Chun Poon ◽  
Desmond C. L. Tan ◽  
Bahareh Khezri ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Palladium Catalyst ◽  
Reduction Reaction ◽  
Theoretical Modelling ◽  
Facile Synthesis ◽  
Highly Active ◽  
Boron Doped

Preparation of Metallic Cobalt Nanoparticles by the Thermal Decomposition of CoC2O4. 2H2O Precursor in the Argon Gas

2011 ◽  
Vol 127 ◽  
pp. 85-88 ◽  
Author(s):  
Xiao Ming Fu
Keyword(s):  
Thermal Decomposition ◽  
Cobalt Nanoparticles ◽  
Cobalt Powder ◽  
Metallic Cobalt ◽  
Crystal Water ◽  
Argon Gas ◽  
Pyrolytic Decomposition ◽  
Two Stages

Metallic cobalt nanoparticles are successfully obtained by the pyrolytic decomposition of CoC2O4. 2H2O in the argon gas. The pyrolysates of CoC2O4. 2H2O were investigated by TG-DSC and SEM. The results showed that there are two stages in the process of the pyrolytic decomposition of CoC2O4. 2H2O in the argon gas. The crystal water in CoC2O4. 2H2O was lost from 150 °C to 275 °C. CoC2O4was pyrolysized into metallic cobalt powder from 300 °C to 500 °C. At the same time, the pattern of pyolysate of CoC2O4. 2H2O was fined at 347.7 °C for 10 min. But, the particles of pyolysate of CoC2O4. 2H2O were sintered into cobalt blocks at 500.0 °C for 10 min. Therefore, the conditions of pyrolytic decomposition of CoC2O4. 2H2O were controlled if single cobalt powder was obtained at 500.0 °C..

Tunable mesoporous manganese oxide for high performance oxygen reduction and evolution reactions

2016 ◽  
Vol 4 (2) ◽  
pp. 620-631 ◽  
Author(s):  
Islam M. Mosa ◽  
Sourav Biswas ◽  
Abdelhamid M. El-Sawy ◽  
Venkatesh Botu ◽  
Curtis Guild ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Manganese Oxide ◽  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Reduction Reaction ◽  
Noble Metal Catalysts ◽  
Highly Active ◽  
State Of Art

Understanding the origin of manganese oxide activity for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is a key step towards rationally designing of highly active catalysts capable of competing with the widely used, state-of-art noble metal catalysts.

Hollow PtCo Nanowires with Rough Surfaces as Highly Active Electrocatalysts for Oxygen Reduction Reaction

2021 ◽  
Vol 6 (22) ◽  
pp. 5399-5405
Author(s):  
Jincheng Wang ◽  
Chuang Li ◽  
Wenjun Zhu ◽  
Jipeng Meng ◽  
Changhai Liang
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Rough Surfaces ◽  
Reduction Reaction ◽  
Highly Active

scholarly journals Highly active and selective oxygen reduction to H2O2 on boron-doped carbon for high production rates

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yang Xia ◽  
Xunhua Zhao ◽  
Chuan Xia ◽  
Zhen-Yu Wu ◽  
Peng Zhu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Density Functional ◽  
High Selectivity ◽  
Density Functional Theory Calculations ◽  
Reduction Reaction ◽  
Production Rates ◽  
Practical Applications ◽  
Highly Active ◽  
Boron Doped ◽  
Oxidized Carbon

AbstractOxygen reduction reaction towards hydrogen peroxide (H2O2) provides a green alternative route for H2O2 production, but it lacks efficient catalysts to achieve high selectivity and activity simultaneously under industrial-relevant production rates. Here we report a boron-doped carbon (B-C) catalyst which can overcome this activity-selectivity dilemma. Compared to the state-of-the-art oxidized carbon catalyst, B-C catalyst presents enhanced activity (saving more than 210 mV overpotential) under industrial-relevant currents (up to 300 mA cm−2) while maintaining high H2O2 selectivity (85–90%). Density-functional theory calculations reveal that the boron dopant site is responsible for high H2O2 activity and selectivity due to low thermodynamic and kinetic barriers. Employed in our porous solid electrolyte reactor, the B-C catalyst demonstrates a direct and continuous generation of pure H2O2 solutions with high selectivity (up to 95%) and high H2O2 partial currents (up to ~400 mA cm−2), illustrating the catalyst’s great potential for practical applications in the future.

The development of a highly durable Fe-N-C electrocatalyst with favorable CNT structures for the oxygen reduction in PEMFCs

2021 ◽  
pp. 1-7
Author(s):  
Shuiyun Shen ◽  
Ziwen Ren ◽  
Silei Xiang ◽  
Shiqu Chen ◽  
Zehao Tan ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Metal Organic Framework ◽  
High Energy ◽  
Proton Exchange ◽  
Rotating Disk Electrode ◽  
High Energy Density ◽  
Pt Catalyst ◽  
Highly Active

Abstract Proton exchange membrane fuel cell (PEMFC) is a crucial route for energy saving, emission reduction and the development of new energy vehicles because of its high power density, high energy density as well as the low operating temperature which corresponds to fast starting and power matching. However, the rare and expensive Pt resource greatly hinders the mass production of fuel cell, and the development of highly active and durable non-precious metal catalysts toward the oxygen reduction reaction (ORR) in the cathode is considered to be the ultimate solution. In this article, a highly active and durable Fe-N-C catalyst was facilely derived from metal organic framework materials (MOFs), and a favorable structure of carbon nanotubes (CNTs) were formed, which accounts for a desired good durability. The as-optimized catalyst has a half-wave potential of 0.84V for the ORR, which is comparable to that of commercial Pt/C. More attractively, it has good stabilities both in rotating disk electrode and single cell tests, which provides a large practical application potential in the replacement of Pt catalyst as the ORR electrocatalyst in fuel cells.

Highly active bimetallic CuFe–N–C electrocatalysts for oxygen reduction reaction in alkaline media

2019 ◽  
Vol 71 ◽  
pp. 234-241 ◽  
Author(s):  
Yun Sik Kang ◽  
Yoonhye Heo ◽  
Jae Young Jung ◽  
Yeonsun Sohn ◽  
Soo-Hyoung Lee ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Highly Active
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