Combinatorial screening of Pd-based quaternary electrocatalysts for oxygen reduction reaction in alkaline media

2017 ◽  
Vol 5 (1) ◽  
pp. 67-72 ◽  
Author(s):  
Jinyang Li ◽  
Helge S. Stein ◽  
Kirill Sliozberg ◽  
Jingbei Liu ◽  
Yanhui Liu ◽  
...  
Keyword(s):  
Thin Film ◽  
Oxygen Reduction Reaction ◽  
High Throughput ◽  
Electrochemical Behavior ◽  
High Throughput Screening ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Film Library ◽  
Combinatorial Screening ◽  
Orr Activity

We examined the ORR activity of a combinatorial Pd–Au–Ag–Ti thin film library using high-throughput screening and correlate the electrochemical behavior to the crystallographic properties.

Diagnosis of the measurement inconsistencies of carbon-based electrocatalysts for the oxygen reduction reaction in alkaline media

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1571-1580 ◽  
Author(s):  
Dongyoon Shin ◽  
Beomgyun Jeong ◽  
Myounghoon Choun ◽  
Joey D. Ocon ◽  
Jaeyoung Lee
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Testing Methodology ◽  
Orr Activity ◽  
Carbon Based

An optimal catalyst testing methodology that could allow precise benchmarking to obtain standardized ORR activity is put forward.

Effect of the N content of Fe/N/graphene catalysts for the oxygen reduction reaction in alkaline media

2015 ◽  
Vol 3 (48) ◽  
pp. 24487-24494 ◽  
Author(s):  
Carlota Domínguez ◽  
F. J. Pérez-Alonso ◽  
Mohamed Abdel Salam ◽  
Shaeel A. Al-Thabaiti ◽  
Miguel A. Peña ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
N Content ◽  
Orr Activity

The ORR activity of Fe/N/G is a balance between the N-content and BET area.

scholarly journals Unveiling the high-activity origin of single-atom iron catalysts for oxygen reduction reaction

2018 ◽  
Vol 115 (26) ◽  
pp. 6626-6631 ◽  
Author(s):  
Liu Yang ◽  
Daojian Cheng ◽  
Haoxiang Xu ◽  
Xiaofei Zeng ◽  
Xin Wan ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Density Functional ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Alkaline Media ◽  
Single Atom ◽  
Iron Catalysts ◽  
Grand Challenge ◽  
Orr Activity

It is still a grand challenge to develop a highly efficient nonprecious-metal electrocatalyst to replace the Pt-based catalysts for oxygen reduction reaction (ORR). Here, we propose a surfactant-assisted method to synthesize single-atom iron catalysts (SA-Fe/NG). The half-wave potential of SA-Fe/NG is only 30 mV less than 20% Pt/C in acidic medium, while it is 30 mV superior to 20% Pt/C in alkaline medium. Moreover, SA-Fe/NG shows extremely high stability with only 12 mV and 15 mV negative shifts after 5,000 cycles in acidic and alkaline media, respectively. Impressively, the SA-Fe/NG-based acidic proton exchange membrane fuel cell (PEMFC) exhibits a high power density of 823 mW cm−2. Combining experimental results and density-functional theory (DFT) calculations, we further reveal that the origin of high-ORR activity of SA-Fe/NG is from the Fe-pyrrolic-N species, because such molecular incorporation is the key, leading to the active site increase in an order of magnitude which successfully clarifies the bottleneck puzzle of why a small amount of iron in the SA-Fe catalysts can exhibit extremely superior ORR activity.

scholarly journals Engineering a metal–organic framework derived Mn–N4–CxSy atomic interface for highly efficient oxygen reduction reaction

2020 ◽  
Vol 11 (23) ◽  
pp. 5994-5999 ◽  
Author(s):  
Huishan Shang ◽  
Zhuoli Jiang ◽  
Danni Zhou ◽  
Jiajing Pei ◽  
Yu Wang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Metal Organic Framework ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Single Atom ◽  
Highly Efficient ◽  
Metal Organic ◽  
Orr Activity ◽  
Atomic Interface

A sulfur modified Mn–N–C single atom catalyst was constructed through an atomic interface strategy, with outstanding ORR activity in alkaline media.

Oxygen Reduction Reaction Electrocatalytic Activity of SAD-Pt/GLAD-Cr Nanorods

2012 ◽  
Vol 1446 ◽  
Author(s):  
Wisam J. Khudhayer ◽  
Nancy Kariuki ◽  
Deborah J. Myers ◽  
Ali U. Shaikh ◽  
Tansel Karabacak
Keyword(s):  
Thin Film ◽  
Magnetron Sputtering ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reference Sample ◽  
Pem Fuel Cells ◽  
Reduction Reaction ◽  
Dc Magnetron Sputtering ◽  
Orr Activity ◽  
Angle Deposition

ABSTRACTNanorod arrays of chromium (Cr) were grown on glassy carbon (GC) electrodes by a dc magnetron sputtering glancing angle deposition (GLAD) technique. The Cr nanorods were used as low-cost, high surface area, metallic supports for a conformal layer of Pt thin film catalyst, as a potential low-loading electrocatalyst for the oxygen reduction reaction (ORR) in polymer electrolyte membrane (PEM) fuel cells. A dc magnetron sputtering small angle deposition (SAD) technique was utilized for a conformal coating of Pt on Cr nanorods. The ORR activity of SAD-Pt/GLAD-Cr electrodes was investigated using cyclic voltammetry (CV) and rotating-disk electrode (RDE) techniques in a 0.1 M HClO4 solution at room temperature. A reference sample consisting of GLAD Cr nanorods coated with a Pt thin film deposited at normal incidence (θ = 0o) was prepared and compared with the SAD-Pt/GLAD-Cr nanorods. Compared to GLAD Cr nanorods coated with Pt thin film at θ = 0o, the SAD-Pt/GLAD-Cr nanorod electrode exhibited higher ECSA and area-specific and mass-specific ORR activity. These results indicate that the growth of catalyst layer on the base-metal nanorods by the SAD technique provides a more conformal and possibly a nanostructured coating, significantly enhancing the catalyst utilization.

Nitrogen- and sulfur-doped carbon nanoplatelets via thermal annealing of alkaline lignin with urea as efficient electrocatalysts for oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (106) ◽  
pp. 104183-104192 ◽  
Author(s):  
Xianlei Zhang ◽  
Dingling Yu ◽  
Yaqing Zhang ◽  
Wenhui Guo ◽  
Xiuxiu Ma ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Thermal Annealing ◽  
Reduction Reaction ◽  
Operational Stability ◽  
Alkaline Media ◽  
Pyrolysis Method ◽  
One Step ◽  
Orr Activity

Novel N–S–C hybrids were synthesized by a facile one-step pyrolysis method, in which the obtained N–S–C 900 was a robust catalyst with enhanced ORR activity and excellent operational stability in alkaline media, superior to the Pt/C catalyst.

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