e-journal

Reforming of Oxygenates for H2 Production: Correlating Reactivity of Ethylene Glycol and Ethanol on Pt(111) and Ni/Pt(111) with Surface d-Band Center

---

The dehydrogenation and decarbonylation of ethylene glycol and ethanol were studied using temperature
programmed desorption (TPD) on Pt(111) and Ni/Pt(111) bimetallic surfaces, as probe reactions for the
reforming of oxygenates for the production of H2 for fuel cells. Ethylene glycol reacted via dehydrogenation
to form CO and H2, corresponding to the desired reforming reaction, and via total decomposition to produce
C(ad), O(ad), and H2. Ethanol reacted by three reaction pathways, dehydrogenation, decarbonylation, and total
decomposition, producing CO, H2, CH4, C(ad), and O(ad). Surfaces prepared by deposition of a monolayer of
Ni on Pt(111) at 300 K, designated Ni-Pt-Pt(111), displayed increased reforming activity compared to
Pt(111), subsurface monolayer Pt-Ni-Pt(111), and thick Ni/Pt(111). Reforming activity was correlated with
the d-band center of the surfaces and displayed a linear trend for both ethylene glycol and ethanol, with
activity increasing as the surface d-band center moved closer to the Fermi level. This trend was opposite to
that previously observed for hydrogenation reactions, where increased activity occurred on subsurface
monolayers as the d-band center shifted away from the Fermi level. Extrapolation of the correlation between
activity and the surface d-band center of bimetallic systems may provide useful predictions for the selection
and rational design of bimetallic catalysts for the reforming of oxygenates.

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

J. Phys. Chem.

No. Panggil

-

Penerbit

New York : American Chemical Society., 2006

Deskripsi Fisik

J. Phys. Chem. B 2006, 110, 1686-1694

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar