Ultrahigh‐Selectivity Photocatalytic Upgrading of Bio‐Aldehydes/Diols to Monoalcohols Via In Situ Circumventing Coupling Co‐Products Over Janus Single‐Atom Pd/TiO <sub>2</sub>
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Photocatalytic transfer hydrogenation of biomass‐derived aldehydes to alcohols often results in unwanted coupling co‐products. Herein, an ultraselective hydrogen transfer system enabled by in situ oxidative C─C bond cleavage over a Janus single‐atom palladium on titanium dioxide (0.5Pd/TiO 2 ) photocatalyst is presented. The TiO 2 carrier promotes hydrogen‐donor activation, while Pd single atoms function as both electron and hydrogen transfer centers, enabling photocatalytic conversion of bio‐based furfural to furfuryl alcohol in >99% yield using ethanol as solvent/H‐donor at 25 °C. The control/in situ experiments and calculations reveal that ethanol on 0.5Pd/TiO 2 preferentially activates a co‐formed coupling by‐product to undergo C─C bond cleavage followed by proton‐coupled electron transfer, exclusively producing furfuryl alcohol. 0.5Pd/TiO 2 with good reusability is applicable to hydrogenative upgrading of various aldehydes/diols into corresponding monoalcohols with 81‒99% yields. This in situ Janus photocatalytic conversion strategy offers a new approach to eliminate side reactions in reductive upgrading of unsaturated organics/biomass with high selectivity.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.003 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it