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Selective photocatalytic conversion of methane into carbon monoxide over zinc-heteropolyacid-titania nanocomposites.

Abstract：

:Chemical utilization of vast fossil and renewable feedstocks of methane remains one of the most important challenges of modern chemistry. Herein, we report direct and selective methane photocatalytic oxidation at ambient conditions into carbon monoxide, which is an important chemical intermediate and a platform molecule. The composite catalysts on the basis of zinc, tungstophosphoric acid and titania exhibit exceptional performance in this reaction, high carbon monoxide selectivity and quantum efficiency of 7.1% at 362 nm. In-situ Fourier transform infrared and X-ray photoelectron spectroscopy suggest that the catalytic performance can be attributed to zinc species highly dispersed on tungstophosphoric acid /titania, which undergo reduction and oxidation cycles during the reaction according to the Mars-van Krevelen sequence. The reaction proceeds via intermediate formation of surface methyl carbonates.

journal_name

Nat Commun

journal_title

Nature communications

authors

Yu X,De Waele V,Löfberg A,Ordomsky V,Khodakov AY

doi

10.1038/s41467-019-08525-2

subject

Has Abstract

pub_date

2019-02-11 00:00:00

pages

700

issue

1

issn

2041-1723

pii

10.1038/s41467-019-08525-2

journal_volume

10

pub_type

杂志文章

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