An ambient aqueous synthesis for highly dispersed and active Pd/C catalyst for formic acid electro-oxidation

N C Cheng, H F Lv, W Wang, S C Mu, M Pan, Frank Marken

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

An experimentally simple process is reported in aqueous solution and under ambient conditions to prepare highly dispersed and active Pd/C catalyst without the use of a stabilizing agent. The [Pd(NH3)(4)](2+) ion is synthesized with gentle heating in aqueous ammonia solution without formation of Pd(OH)(x) complex intermediates. The adsorbed [Pd(NH3)(4)](2+) on the surface of carbon (Vulcan XC-72) is reduced in situ to Pd nanoparticles by NaBH4. The Pd/C catalyst obtained is characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that highly dispersed Pd/C catalyst with 20 wt.% Pd content and with an average Pd nanoparticle diameter of 4.3-4.7 nm could be obtained. The electrochemical measurements show that the Pd/C catalyst without stabilizer has a higher electro-oxidation activity for formic acid compared to that of a Pd/C catalyst prepared in a traditional high temperature polyol process in ethylene glycol.
Original languageEnglish
Pages (from-to)7246-7249
Number of pages4
JournalJournal of Power Sources
Volume195
Issue number21
DOIs
Publication statusPublished - Nov 2010

Keywords

  • fuel cell
  • ammonia complex
  • formic acid oxidation
  • pd nanoparticles
  • voltammetry

Fingerprint Dive into the research topics of 'An ambient aqueous synthesis for highly dispersed and active Pd/C catalyst for formic acid electro-oxidation'. Together they form a unique fingerprint.

  • Cite this