Volume 59, Issue 36 pp. 15527-15531
Communication

POM-Incorporated CoO Nanowires for Enhanced Photocatalytic Syngas Production from CO2

Haozhou Yang

Haozhou Yang

Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084 China

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Deren Yang

Deren Yang

Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084 China

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Prof. Dr. Xun Wang

Corresponding Author

Prof. Dr. Xun Wang

Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084 China

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First published: 06 May 2020
Citations: 90

Dedicated to Professor Youqi Tang on the occasion of his 100th birthday

Graphical Abstract

POM-incorporated CoO ultrathin nanowires (CoO UNWs) were fabricated by a facile solvothermal method. The UNWs with and without POM incorporation both present superior photocatalysis activities towards syngas production compared with nanowire bundle. Mechanistic studies indicate that size, structure, and composition all contribute to the high performance.

Abstract

Utilizing sustainable energy for chemical activation of small molecules, such as CO2, to produce important chemical feedstocks is highly desirable. The simultaneous production of CO/H2 mixture (syngas) from photoreduction of CO2 and H2O is highly promising. However, the relationships between structure, composition, crystallinity, and photocatalytic performance are still indistinct. Here, amorphous ultrathin CoO nanowires and polyoxometalate incorporated nanowires with even lower crystallinity were synthesized. The POM-incorporated ultrathin nanowires exhibit high photocatalytic syngas production activity, reaching H2 and CO evolution rates of 11555 and 4165 μmol g−1 h−1 respectively. Further experiments indicate that the ultrathin morphology and incorporation of POM both contribute to the superior performance. Multiple characterizations reveal the enhanced charge–hole separation efficiency of the catalyst would facilitate the photocatalysis.

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