Boosting light-driven hydrogen evolution through cerium vanadate/cerium sulphide type–II heterostructure
Bibliographic record
Abstract
Fabrication of heterostructures to boost the light-driven hydrogen evolution is one of the efficient way to address the energy crisis across the globe. Cerium vanadate (CeV)/Cerium sulphide (CeS) heterostructure has been synthesized using a simple hydrothermal method. Structural, spectroscopic, morphological, optical and photoelectrochemical characterizations confirm the formation of heterostructure between CeV and CeS. Photochemical hydrogen evolution was observed in all the three catalysts (CeV, CeS and CeV/CeS) both under visible and ultraviolet light sources. CeS, CeV and CeV/CeS found to evolve 3897, 6453 and 12,456 μmol of hydrogen in 4 h, respectively under visible light. In addition photoelectrochemical hydrogen evolution experiment was conducted in which, CeV/CeS heterostructure showed high photocurrent density at 0.25 V vs. RHE, which is almost 1.47 folds greater than that of CeV and 2.1 times that of CeS. The optical and electrochemical characteristics shows that photocatalytic hydrogen evolution follows type-II heterostructure. A good stability of the CeV/CeS heterostructure finds its suitability for practical applications for various photocatalytic experiments. • Simple and facile fabrication of CeVO 4 /Ce 2 S 3 heterostructure. • Enhanced photochemical, electrochemical and photochemical activity in CeV/CeS than pristine materials. • Synthesized materials showed good photochemical and photoelectrochemical H 2 evolution. • CeS, CeV and CeV/CeS found to evolve 3897, 6453 and 12,456 μmol of hydrogen in 4 h. • Photoctalytic mechanism follows type-II heterostructure.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| 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 | 0.000 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".