Low-temperature generation of basic carbon surfaces by hydrogen spillover

J. Angel Menéndez, Ljubisa R. Radovic, Bo Xia, Jonathan Phillips

Research output: Contribution to journalArticle

67 Scopus citations

Abstract

It is demonstrated that stable basic carbons, which will not adsorb oxygen in ambient laboratory conditions, can be created via a relatively low-temperature process. These highly basic carbons are created by treating mixtures of carbons and platinum (in the form of particles supported on a high surface area material) in hydrogen at 500°C, or even at lower temperatures in some cases. In the absence of platinum, creation of highly basic and stable surfaces with the same starting material requires hydrogen treatments at far higher temperatures (ca. 900°C). Evidence is presented to support the hypothesis that the role played by platinum (or any noble metal) is to produce atomic hydrogen, which spills over onto the carbon surface. This atomic hydrogen hydrogasifies the most reactive, unsaturated carbon atoms at far lower temperatures than molecular hydrogen, thus leading to surface stabilization at relatively low temperatures.

Original languageEnglish (US)
Pages (from-to)17243-17248
Number of pages6
JournalJournal of physical chemistry
Volume100
Issue number43
DOIs
StatePublished - Oct 24 1996

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

Cite this