Cu-based high-entropy two-dimensional oxide as stable and active photothermal catalyst.
basic_science · Level V
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- Record sourced from PubMed, PMID 37264007.
- Also identified by DOI 10.1038/s41467-023-38889-5 and PMC identifier 10235064.
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Abstract
Cu-based nanocatalysts are the cornerstone of various industrial catalytic processes. Synergistically strengthening the catalytic stability and activity of Cu-based nanocatalysts is an ongoing challenge. Herein, the high-entropy principle is applied to modify the structure of Cu-based nanocatalysts, and a PVP templated method is invented for generally synthesizing six-eleven dissimilar elements as high-entropy two-dimensional (2D) materials. Taking 2D Cu<sub>2</sub>Zn<sub>1</sub>Al<sub>0.5</sub>Ce<sub>5</sub>Zr<sub>0.5</sub>O<sub>x</sub> as an example, the high-entropy structure not only enhances the sintering resistance from 400 °C to 800 °C but also improves its CO<sub>2</sub> hydrogenation activity to a pure CO production rate of 417.2 mmol g<sup>-1</sup> h<sup>-1</sup> at 500 °C, 4 times higher than that of reported advanced catalysts. When 2D Cu<sub>2</sub>Zn<sub>1</sub>Al<sub>0.5</sub>Ce<sub>5</sub>Zr<sub>0.5</sub>O<sub>x</sub> are applied to the photothermal CO<sub>2</sub> hydrogenation, it exhibits a record photochemical energy conversion efficiency of 36.2%, with a CO generation rate of 248.5 mmol g<sup>-1</sup> h<sup>-1</sup> and 571 L of CO yield under ambient sunlight irradiation. The high-entropy 2D materials provide a new route to simultaneously achieve catalytic stability and activity, greatly expanding the application boundaries of photothermal catalysis.