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Polymorph selection towards photocatalytic gaseous CO2 hydrogenation.


ABSTRACT: Titanium dioxide is the only known material that can enable gas-phase CO2 photocatalysis in its anatase and rutile polymorphic forms. Materials engineering of polymorphism provides a useful strategy for optimizing the performance metrics of a photocatalyst. In this paper, it is shown that the less well known rhombohedral polymorph of indium sesquioxide, like its well-documented cubic polymorph, is a CO2 hydrogenation photocatalyst for the production of CH3OH and CO. Significantly, the rhombohedral polymorph exhibits higher activity, superior stability and improved selectivity towards CH3OH over CO. These gains in catalyst performance originate in the enhanced acidity and basicity of surface frustrated Lewis pairs in the rhombohedral form.

SUBMITTER: Yan T 

PROVIDER: S-EPMC6555785 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Polymorph selection towards photocatalytic gaseous CO<sub>2</sub> hydrogenation.

Yan Tingjiang T   Wang Lu L   Liang Yan Y   Makaremi Meysam M   Wood Thomas E TE   Dai Ying Y   Huang Baibiao B   Ali Feysal M FM   Dong Yuchan Y   Ozin Geoffrey A GA  

Nature communications 20190607 1


Titanium dioxide is the only known material that can enable gas-phase CO<sub>2</sub> photocatalysis in its anatase and rutile polymorphic forms. Materials engineering of polymorphism provides a useful strategy for optimizing the performance metrics of a photocatalyst. In this paper, it is shown that the less well known rhombohedral polymorph of indium sesquioxide, like its well-documented cubic polymorph, is a CO<sub>2</sub> hydrogenation photocatalyst for the production of CH<sub>3</sub>OH and  ...[more]

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