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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Yu KM,Tong W,West A,Cheung K,Li T,Smith G,Guo Y,Tsang SCdoi
10.1038/ncomms2242subject
Has Abstractpub_date
2012-01-01 00:00:00pages
1230issn
2041-1723pii
ncomms2242journal_volume
3pub_type
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