Simultaneous value-added utilization of photogenerated electrons and holes on Pd/TiO<sub>2</sub>.
basic_science · Level V
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- Record sourced from PubMed, PMID 40595709.
- Also identified by DOI 10.1038/s41467-025-61223-0 and PMC identifier 12214744.
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Abstract
The biggest challenge facing the advancement of photocatalytic technology so far is how to achieve the simultaneous and efficient utilization of photogenerated electrons and holes for dual value-added chemicals. Here we show that Pd/TiO<sub>2</sub> with electronic metal-support interaction realizes photocatalytic H<sub>2</sub>O<sub>2</sub> evolution coupled with furfural selective oxidation to furoic acid. We demonstrate that the electronic structure of Pd is modulated to form Pd<sup>δ+</sup> active sites and upshifted d-band center via electronic metal-support interaction, enhancing O<sub>2</sub> adsorption and H<sub>2</sub>O<sub>2</sub> evolution performance, and the photogenerated holes from TiO<sub>2</sub> oxidize furfural undergoing the Aldehyde-Water Shift to furoic acid by sequential breaking of O-H and C-H bonds. The optimal Pd/TiO<sub>2</sub> achieves H<sub>2</sub>O<sub>2</sub> and furoic acid evolution rates of 3672.31 and 4529.08 μM h<sup>-1</sup> with furfural conversion of 92.66% and furoic acid selectivity of 97.82%. Our work provides a promising approach for enhancing synergistic photosynthesis of dual value-added chemicals, thus advancing carbon neutrality goals.