Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte: Part 3: The oxygen reduction reaction

Thumbnail image of item number 1 in: 'Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte: Part 3: The oxygen reduction reaction'.
Thumbnail image of item number 2 in: 'Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte: Part 3: The oxygen reduction reaction'.
Thumbnail image of item number 3 in: 'Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte: Part 3: The oxygen reduction reaction'.
Thumbnail image of item number 4 in: 'Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte: Part 3: The oxygen reduction reaction'.
Showing 1-4 of 29 pages in this article.

PDF Version Also Available for Download.

Description

The kinetics of the oxygen reduction reaction (ORR) was studied in alkaline electrolyte at 293-333K on Pt(hkl) surfaces by means of the rotating ring-disk electrode technique with solution phase peroxide detected at the ring electrode. The ORR on Pt(hkl) was found to be highly structure sensitive with activities increasing in the sequence (111) > (100) > (110)(1x2). Very similar apparent activation energies (37-45 {+-} 5 kJmol-1, {eta} = 0.35 V) were found on all three surfaces. Furthermore, at elevated temperature, significantly smaller amounts of peroxide are formed in agreement with enhanced peroxide reduction rates by increasing temperature. We found that … continued below

Creation Information

tom.schmidt@psi.ch August 1, 2002.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Author

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

About | Browse this Partner

Contact Us

Corrections Questions

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

The kinetics of the oxygen reduction reaction (ORR) was studied in alkaline electrolyte at 293-333K on Pt(hkl) surfaces by means of the rotating ring-disk electrode technique with solution phase peroxide detected at the ring electrode. The ORR on Pt(hkl) was found to be highly structure sensitive with activities increasing in the sequence (111) > (100) > (110)(1x2). Very similar apparent activation energies (37-45 {+-} 5 kJmol-1, {eta} = 0.35 V) were found on all three surfaces. Furthermore, at elevated temperature, significantly smaller amounts of peroxide are formed in agreement with enhanced peroxide reduction rates by increasing temperature. We found that the Tafel slopes on all three single crystal surfaces decrease with increasing temperature, indicating that the logi-E relationship is not represented by a classical Butler-Volmer expression. Based on the kinetic analysis of the polarization curves and from simulations of logi-E curves, we propose that the rate of the ORR on Pt(hkl) in alkaline solution is mainly determined by the potential/temperature dependent surface coverage by OH{sub ad}. We propose two modes of action of the OH{sub ad}: (i) OH{sub ad} blocks the adsorption of O{sub 2} on active platinum sites; and (ii) OH{sub ad} alters the adsorption energy of intermediates which are formed during the ORR on Pt sites.

Source

  • Journal Name: Physical Chemistry Chemical Physics; Journal Volume: 5; Journal Issue: 2; Related Information: Journal Publication Date: 2003

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Report No.: LBNL--51404
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 917797
  • Archival Resource Key: ark:/67531/metadc881821

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

About | Browse this Collection

What responsibilities do I have when using this article?

Digital Files

When

Dates and time periods associated with this article.

Creation Date

  • August 1, 2002

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

Description Last Updated

  • Dec. 1, 2017, 3:39 p.m.

Usage Statistics

When was this article last used?

Yesterday: 1
Past 30 days: 1
Total Uses: 8
More Statistics

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte: Part 3: The oxygen reduction reaction'.
Thumbnail image of item number 2 in: 'Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte: Part 3: The oxygen reduction reaction'.
Thumbnail image of item number 3 in: 'Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte: Part 3: The oxygen reduction reaction'.
Thumbnail image of item number 4 in: 'Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte: Part 3: The oxygen reduction reaction'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Links for Robots

Helpful links in machine-readable formats.

Archival Resource Key (ARK)

International Image Interoperability Framework (IIIF)

Metadata Formats

Images

URLs

Stats

tom.schmidt@psi.ch. Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte: Part 3: The oxygen reduction reaction, article, August 1, 2002; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc881821/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

Back to Top of Screen