Development of a highly active Fe N C catalyst with the preferential formation of atomic iron sites for oxygen reduction in alkaline and acidic electrolytes

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.

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

ChemistrySelect ◽

10.1002/slct.202101120 ◽

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

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

Nature Communications ◽

10.1038/s41467-021-24329-9 ◽

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.

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

Journal of Electrochemical Energy Conversion and Storage ◽

10.1115/1.4050725 ◽

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.

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