Enhanced hydrogen selectivity via photo-engineered surface defects for methanol steam reformation using zinc oxide-copper nanocomposite catalysts
2014 (English)In: Applied Catalysis A: General, ISSN 0926-860X, E-ISSN 1873-3875, Vol. 471, 63-69 p.Article in journal (Refereed) Published
Methanol steam reformation (MSR) to produce hydrogen (H-2) gas using copper on zinc oxide (Cu/ZnO) supported catalysts is attractive due to the simple and low cost preparation process of the catalyst. H-2 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 H-2 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 H-2 selectivity by 57% along with a corresponding increase in CO content, which can be controlled by adjusting H2O:MeOH ratio in the precursor solution.
Place, publisher, year, edition, pages
Elsevier, 2014. Vol. 471, 63-69 p.
IdentifiersURN: urn:nbn:se:kth:diva-175176DOI: 10.1016/j.apcata.2013.11.040ISI: 000331481600008ScopusID: 2-s2.0-84890514243OAI: oai:DiVA.org:kth-175176DiVA: diva2:914286
QC 201604012016-03-232015-10-102016-04-01Bibliographically approved