title: Non-syngas direct steam reforming of methanol to hydrogen and carbon dioxide at low temperature.
abstract: A non-syngas direct steam reforming route is investigated for the conversion of methanol to hydrogen and carbon dioxide over a CuZnGaO(x) catalyst at 150-200 °C. This route is in marked contrast with the conventional complex route involving steam reformation to syngas (CO/H2) at high temperature, followed by water gas shift and CO cleanup stages for hydrogen production. Here we report that high quality hydrogen and carbon dioxide can be produced in a single-step reaction over the catalyst, with no detectable CO (below detection limit of 1 ppm). This can be used to supply proton exchange membrane fuel cells for mobile applications without invoking any CO shift and cleanup stages. The working catalyst contains, on average, 3-4 nm copper particles, alongside extremely small size of copper clusters stabilized on a defective ZnGa2O4 spinel oxide surface, providing hydrogen productivity of 393.6 ml g(-1)-cat h(-1) at 150 °C.
authors.affiliation: Wolfson Catalysis Centre, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK.
authors.forename: Kai Man Kerry
authors.initials: KM
authors.lastname: Yu
authors.forename: Weiyi
authors.initials: W
authors.lastname: Tong
authors.forename: Adam
authors.initials: A
authors.lastname: West
authors.forename: Kevin
authors.initials: K
authors.lastname: Cheung
authors.forename: Tong
authors.initials: T
authors.lastname: Li
authors.forename: George
authors.initials: G
authors.lastname: Smith
authors.forename: Yanglong
authors.initials: Y
authors.lastname: Guo
authors.forename: Shik Chi Edman
authors.initials: SC
authors.lastname: Tsang