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Self-assembled novel Co/Ni-based ε-Keggin crystal materials as highly efficient photocatalysts for diluted CO2 photoreduction.
- Source :
- Journal of Materials Chemistry A; 3/7/2024, Vol. 12 Issue 9, p5340-5347, 8p
- Publication Year :
- 2024
-
Abstract
- The light-driven catalytic conversion of diluted CO<subscript>2</subscript> resources into value-added CO can be perceived as an effective way to fulfill sustainable green energy development, yet it's still in its inception stage because triggering this reaction remains a challenge due to its inert CO<subscript>2</subscript>. Herein, two unprecedented polyoxometalate-based crystalline heterogeneous catalysts formulated as {[H<subscript>4</subscript>GeMo<subscript>8</subscript><superscript>V</superscript>Mo<subscript>4</subscript><superscript>VI</superscript>O<subscript>40</subscript>Co<subscript>4</subscript>][DETA]<subscript>4</subscript>}·5H<subscript>2</subscript>O (Co-ε-Keggin) and {[H<subscript>4</subscript>GeMo<subscript>8</subscript><superscript>V</superscript>Mo<subscript>4</subscript><superscript>VI</superscript>O<subscript>40</subscript>Ni<subscript>4</subscript>][DETA]<subscript>4</subscript>}·4H<subscript>2</subscript>O (Ni-ε-Keggin) (DETA = diethylenetriamine) were elaborately prepared. Remarkably, thanks to the Ni site's capacity to bind CO<subscript>2</subscript> and effective charge separation capability of Ni-ε-Keggin, it exhibits an ultra-high rate of 24 657.2 μmol g<superscript>−1</superscript> h<superscript>−1</superscript> with a high CO selectivity of 98.3% in a pure CO<subscript>2</subscript> atmosphere, and 16 199.3 μmol g<superscript>−1</superscript> h<superscript>−1</superscript> with 94.6% selectivity in 10% diluted CO<subscript>2</subscript>. These results are superior to the performance of most photocatalysts in diluted CO<subscript>2</subscript> and also better than the behavior of many photocatalysts in pure CO<subscript>2</subscript> photocatalysis. The pioneering designs of Co/Ni-ε-Keggin series crystalline materials applied for low-concentration CO<subscript>2</subscript> open up a new platform for CO<subscript>2</subscript> efficient resource conversion. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 12
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 175698095
- Full Text :
- https://doi.org/10.1039/d3ta06964h