Cu–Ce Dual–Atom Sites Embedded in Zeolites Boost Resistance to Impurity Interference for Environmental Catalysis
Bibliographic record
Abstract
Abstract Biodiesel, a carbon‐neutral alternative to fossil fuels, plays a vital role in decarbonizing transportation, with global production exceeding 40 million tons annually. However, its widespread use introduces elevated phosphorus and metal cations into vehicle exhaust, severely deactivating Cu‐SSZ‐13 catalysts for NO X reduction through pore blockage, framework degradation, and Cu sites loss. We present a Cu–Ce dual‐atom catalyst embedded in SSZ‐13 that maintains high performance in ammonia‐selective catalytic reduction under phosphorus‐rich conditions. Ce species, precisely positioned in eight‐membered rings, displace P‐sensitive [ZCu 2+ OH] + sites, enriching the catalyst with P‐tolerant Z 2 Cu 2 ⁺ species in six‐membered rings. Concurrent Ce─P interactions restore the electronic environment of Cu sites, enhancing NH 3 /NO adsorption and redox cycling. This design sustains 90% NO X conversion and 100% N 2 selectivity at 210 °C, even after phosphorus exposure. The strategy is broadly applicable to impurity‐sensitive environmental reactions, including NH 3 oxidation and the coupled removal of NO X with VOCs, offering a practical pathway to durable, poison‐resistant catalysts for clean and sustainable mobility.
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How this classification was reachedexpand
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 | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".