Enhanced hydrogen selectivity via photo-engineered surface defects for methanol steam reformation using zinc oxide-copper nanocomposite catalysts

Supamas Danwittayakul, Karthik Lakshman, Salim Al-Harthi, Joydeep Dutta

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Methanol steam reformation (MSR) to produce hydrogen (H2) gas using copper on zinc oxide (Cu/ZnO) supported catalysts is attractive due to the simple and low cost preparation process of the catalyst. H2 yield from MSR is proportional to total catalyst loading which can be tuned during catalyst preparation. By creating UV-c light induced surface defects on ZnO nanorods, we have shown improved copper (Cu) nano-particle distribution on the ZnO nanorods leading to better H2 yield. Increase in Cu nanoparticle adsorption is achieved by in situ reduction of Cu ions by photo-generated electrons, facilitated by ZnO surface defects that act as high energy sites favorable for Cu ion adsorption and their subsequent growth into nanoparticles. The modulated Cu/ZnO catalyst increases H2 selectivity by 57% along with a corresponding increase in CO content, which can be controlled by adjusting H2O:MeOH ratio in the precursor solution.

Original languageEnglish
Pages (from-to)63-69
Number of pages7
JournalApplied Catalysis A: General
Volume471
DOIs
Publication statusPublished - Feb 10 2014

Fingerprint

Zinc Oxide
Surface defects
Steam
Zinc oxide
Methanol
Copper
Hydrogen
Nanocomposites
Catalysts
Nanorods
Ions
Nanoparticles
Adsorption
Catalyst selectivity
Carbon Monoxide
Catalyst supports
Gases
Electrons
Costs

Keywords

  • Cu/ZnO nanocatalysts
  • Hydrogen production
  • Methanol steam reforming
  • ZnO nanorods

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Enhanced hydrogen selectivity via photo-engineered surface defects for methanol steam reformation using zinc oxide-copper nanocomposite catalysts. / Danwittayakul, Supamas; Lakshman, Karthik; Al-Harthi, Salim; Dutta, Joydeep.

In: Applied Catalysis A: General, Vol. 471, 10.02.2014, p. 63-69.

Research output: Contribution to journalArticle

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