The design of Ti-, V-, Cr-oxide single-site catalysts within zeolite frameworks and their photocatalytic reactivity for the decomposition of undesirable molecules—The role of their excited states and reaction mechanisms

Pencarian berdasarkan :

SEMUA Pengarang Subjek ISBN/ISSN Pencarian Spesifik

Pencarian terakhir:

e-journal

The design of Ti-, V-, Cr-oxide single-site catalysts within zeolite frameworks and their photocatalytic reactivity for the decomposition of undesirable molecules—The role of their excited states and reaction mechanisms

Masakazu Anpo - Nama Orang; Tae-Ho Kim - Nama Orang; Masaya Matsuoka - Nama Orang;

Abstract.
Transition metal oxides (Ti, V, Mo, Cr, etc.) incorporated within the framework of zeolites were found to
exhibit high and unique photocatalytic reactivity as single-site heterogeneous catalysts for various
reactions such as the decomposition of NOx (NO, N2O) into N2 and O2, the reduction of CO2 with H2O to
produce CH4 and CH3OH, the preferential oxidation of CO in the presence of H2 (PROX), the partial
oxidation of various hydrocarbons with O2 or NO or N2O and the epoxidation and metathesis reaction of
alkenes. In situ spectroscopic investigations of these photofunctional systems applying photoluminescence,
XAFS (XANES and FT-EXAFS), ESR and FT-IR revealed that the photo-excited states of the transition
metal oxides play a vital role in the photocatalytic reactions. The high photocatalytic efficiency and
selectivity of these single-site catalysts for significant reactions, which could not be observed with
semiconducting bulk photocatalysts, were found to depend strongly on the unique and isolated local
structure of the catalysts constructed within the restricted framework structure of the zeolites.

Keywords:
Single-site catalyst
Photocatalysis
Transition metal oxide species
Charge-transfer excited state
Electron–hole pair state
Zeolites
Mesoporous molecular sieves
NOx decomposition
CO2 reduction
Preferential oxidation of CO in H2 (PROX)

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri: Catalysis Today
No. Panggil: -
Penerbit: London : Elsevier B.V.., 2009
Deskripsi Fisik: Catalysis Today 142 (2009) 114–124
Bahasa: English
ISBN/ISSN: -
Klasifikasi: -
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: -
Subjek: KIMIA
Info Detail Spesifik: -
Pernyataan Tanggungjawab: agus

Versi lain/terkait

Tidak tersedia versi lain

Lampiran Berkas

The design of Ti-, V-, Cr-oxide single-site catalysts within zeolite frameworks and their photocatalytic reactivity for the decomposition of undesirable molecules—The role of their excited states and reaction mechanisms

Komentar

Anda harus masuk sebelum memberikan komentar