Oxygen Reduction Reaction Measurements on Platinum Electrocatalysts Utilizing Rotating Disk Electrode Technique: II. Influence of Ink Formulation, Catalyst Layer Uniformity and Thickness

Shinozaki, Kazuma; Zack, Jason W.; Pylypenko, Svitlana; Pivovar, Bryan S.; Kocha, Shyam S.

doi:10.1149/2.0551512jes

Title: Oxygen Reduction Reaction Measurements on Platinum Electrocatalysts Utilizing Rotating Disk Electrode Technique: II. Influence of Ink Formulation, Catalyst Layer Uniformity and Thickness

Journal Article · Thu Sep 17 00:00:00 EDT 2015 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/2.0551512jes· OSTI ID:1233476

Shinozaki, Kazuma ^[1]; Zack, Jason W. ^[2]; Pylypenko, Svitlana ^[3]; Pivovar, Bryan S. ^[2]; Kocha, Shyam S. ^[2]

National Renewable Energy Lab. (NREL), Golden, CO (United States); Colorado School of Mines, Golden, CO (United States); Toyota Central R&D Labs., Inc., Aichi (Japan)
National Renewable Energy Lab. (NREL), Golden, CO (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States); Colorado School of Mines, Golden, CO (United States)

Platinum electrocatalysts supported on high surface area and Vulcan carbon blacks (Pt/HSC, Pt/V) were characterized in rotating disk electrode (RDE) setups for electrochemical area (ECA) and oxygen reduction reaction (ORR) area specific activity (SA) and mass specific activity (MA) at 0.9 V. Films fabricated using several ink formulations and film-drying techniques were characterized for a statistically significant number of independent samples. The highest quality Pt/HSC films exhibited MA 870 ± 91 mA/mgPt and SA 864 ± 56 μA/cm² Pt while Pt/V had MA 706 ± 42 mA/mgPt and SA 1120 ± 70 μA/cm² Pt when measured in 0.1 M HClO₄, 20 mV/s, 100 kPa O₂and 23±2°C. An enhancement factor of 2.8 in themeasured SA was observable on eliminating Nafion ionomer and employing extremely thin, uniform films (~4.5 μg/cm² Pt) of Pt/HSC. The ECA for Pt/HSC (99 ± 7 m2/gPt) and Pt/V (65 ± 5 m²/gPt) were statistically invariant and insensitive to film uniformity/thickness/fabrication technique; accordingly, enhancements in MA are wholly attributable to increases in SA. Impedance measurements coupled with scanning electron microscopy were used to de-convolute the losses within the catalyst layer and ascribed to the catalyst layer resistance, oxygen diffusion, and sulfonate anion adsorption/blocking. The ramifications of these results for proton exchange membrane fuel cells have also been examined.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Hydrogen Fuel Cell Technologies Office (HFTO)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1233476

Report Number(s):: NREL/JA-5900-65578

Journal Information:: Journal of the Electrochemical Society, Vol. 162, Issue 12; Related Information: Journal of the Electrochemical Society; ISSN 0013-4651

Publisher:: The Electrochemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 180 works

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Pt‐Based Nanocrystal for Electrocatalytic Oxygen Reduction Zhao, Zipeng; Chen, Changli; Liu, Zeyan Advanced Materials, Vol. 31, Issue 31 https://doi.org/10.1002/adma.201808115	journal	December 2018
Frequent Pitfalls in the Characterization of Electrodes Designed for Electrochemical Energy Conversion and Storage Zeradjanin, Aleksandar R. ChemSusChem, Vol. 11, Issue 8 https://doi.org/10.1002/cssc.201702287	journal	March 2018
Medium Modulated Oxygen Reduction Activity of Fe/Co Active Centre‐engrafted Electrocatalysts Kashyap, Varchaswal; Anand, Aljo; Soni, Roby ChemElectroChem, Vol. 6, Issue 11 https://doi.org/10.1002/celc.201900260	journal	May 2019
The Hydrogen Oxidation Reaction in Alkaline Medium: An Overview Campos-Roldán, Carlos Augusto; Alonso-Vante, Nicolas Electrochemical Energy Reviews, Vol. 2, Issue 2 https://doi.org/10.1007/s41918-019-00034-6	journal	March 2019
Self-assembly of noble metal monolayers on transition metal carbide nanoparticle catalysts Hunt, S. T.; Milina, M.; Alba-Rubio, A. C. Science, Vol. 352, Issue 6288 https://doi.org/10.1126/science.aad8471	journal	May 2016
Benchmarking high surface area electrocatalysts in a gas diffusion electrode: measurement of oxygen reduction activities under realistic conditions Inaba, Masanori; Jensen, Anders Westergaard; Sievers, Gustav Wilhelm Royal Society of Chemistry https://doi.org/10.7892/boris.122191	text	January 2018

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