scholarly journals Understanding the Crucial Significance of the Temperature and Potential Window on the Stability of Carbon Supported Pt-Alloy Nanoparticles as Oxygen Reduction Reaction Electrocatalysts

ACS Catalysis ◽  
2021 ◽  
pp. 101-115
Author(s):  
Tina Đukić ◽  
Leonard Jean Moriau ◽  
Luka Pavko ◽  
Mitja Kostelec ◽  
Martin Prokop ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Alloy Nanoparticles ◽  
Pt Alloy ◽  
The Stability

scholarly journals Insights into electrochemical dealloying of Cu out of Au-doped Pt-alloy nanoparticles at the sub-nano-scale

2018 ◽  
Vol 8 (1) ◽  
pp. 87-100 ◽  
Author(s):  
Matija Gatalo ◽  
Primož Jovanovič ◽  
Francisco Ruiz-Zepeda ◽  
Andraž Pavlišič ◽  
Ana Robba ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Low Temperature ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Noble Metal ◽  
Reduction Reaction ◽  
Alloy Nanoparticles ◽  
Pt Alloy ◽  
Low Temperature Fuel Cells ◽  
Pt Electrocatalysts

Pt alloy nanoparticles present the most probable candidate to be used as the cathode cathodic oxygen reduction reaction electrocatalyst for achieving commercialization targets of the low-temperature fuel cells. It is therefore very important to understand its activation and degradation processes. Besides the ones known from the pure Pt electrocatalysts, the dealloying phenomena possess a great threat since the leached less-noble metal can interact with the polymer membrane or even poison the electrocatalyst. In this study, we present a solution, supported by in-depth advance electrochemical characterization, on how to suppress the removal of Cu from the Pt alloy nanoparticles.

scholarly journals Model building analysis – a novel method for statistical evaluation of Pt L3-edge EXAFS data to unravel the structure of Pt-alloy nanoparticles for the oxygen reduction reaction on highly oriented pyrolytic graphite

2020 ◽  
Vol 22 (34) ◽  
pp. 18815-18823 ◽  
Author(s):  
Felix E. Feiten ◽  
Shuntaro Takahashi ◽  
Oki Sekizawa ◽  
Yuki Wakisaka ◽  
Tomohiro Sakata ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Analytical Method ◽  
Model Building ◽  
Statistical Evaluation ◽  
Pyrolytic Graphite ◽  
Reduction Reaction ◽  
Alloy Nanoparticles ◽  
Pt Alloy ◽  
Novel Method

We have developed a novel analytical method combining model building and statistical evaluation to determine the structure of multimetallic nanoparticles from EXAFS of a single adsorption edge.

scholarly journals Cover Feature: A Review on Recent Developments and Prospects for the Oxygen Reduction Reaction on Hollow Pt-alloy Nanoparticles (ChemPhysChem 13/2018)

ChemPhysChem ◽  
2018 ◽  
Vol 19 (13) ◽  
pp. 1549-1549
Author(s):  
Tristan Asset ◽  
Raphaël Chattot ◽  
Marie Fontana ◽  
Benjamin Mercier-Guyon ◽  
Nathalie Job ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Alloy Nanoparticles ◽  
Recent Developments ◽  
Pt Alloy

A Review on Recent Developments and Prospects for the Oxygen Reduction Reaction on Hollow Pt-alloy Nanoparticles

ChemPhysChem ◽  
2018 ◽  
Vol 19 (13) ◽  
pp. 1552-1567 ◽  
Author(s):  
Tristan Asset ◽  
Raphaël Chattot ◽  
Marie Fontana ◽  
Benjamin Mercier-Guyon ◽  
Nathalie Job ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Alloy Nanoparticles ◽  
Recent Developments ◽  
Pt Alloy

scholarly journals Superior FexN electrocatalyst derived from 1,1′-diacetylferrocene for oxygen reduction reaction in alkaline and acidic media

2020 ◽  
Vol 9 (1) ◽  
pp. 843-852
Author(s):  
Hunan Jiang ◽  
Jinyang Li ◽  
Mengni Liang ◽  
Hanpeng Deng ◽  
Zuowan Zhou
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Current Density ◽  
Active Sites ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Acidic Media ◽  
Onset Potential ◽  
Acidic And Alkaline Media ◽  
The Stability

AbstractAlthough Fe–N/C catalysts have received increasing attention in recent years for oxygen reduction reaction (ORR), it is still challenging to precisely control the active sites during the preparation. Herein, we report FexN@RGO catalysts with the size of 2–6 nm derived from the pyrolysis of graphene oxide and 1,1′-diacetylferrocene as C and Fe precursors under the NH3/Ar atmosphere as N source. The 1,1′-diacetylferrocene transforms to Fe3O4 at 600°C and transforms to Fe3N and Fe2N at 700°C and 800°C, respectively. The as-prepared FexN@RGO catalysts exhibited superior electrocatalytic activities in acidic and alkaline media compared with the commercial 10% Pt/C, in terms of electrochemical surface area, onset potential, half-wave potential, number of electrons transferred, kinetic current density, and exchange current density. In addition, the stability of FGN-8 also outperformed commercial 10% Pt/C after 10000 cycles, which demonstrates the as-prepared FexN@RGO as durable and active ORR catalysts in acidic media.

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