Aminosilanized Interface Promotes Electrochemically Stable Carbon Nitride Films with Fewer Trap States on FTO for (Photo)electrochemical Systems
Bibliographic record
Abstract
We have demonstrated the direct growth of a CN x layer on a plasma-cleaned and aminosilanized F-doped SnO 2 (FTO) electrode to study the CN x |FTO interface that is critical for (photo)electrocatalytic systems. The (3-aminopropyl)triethoxysilane (APTES) was chosen as a bifunctional organosilane, with the amino end incorporating into CN x and the silane end connecting to the hydroxylated FTO surface. Plasma cleaning and aminosilanization resulted in a highly hydrophilic surface, which leads to better contact of melted thiourea to the aminosilanized FTO (p-FTO NH2 ) during CN x polymer condensation, thus generating a thinner and more compact CN x layer. The modification at the interface was shown to influence the CN x growth on length scales of tens of micrometers. We grew CN x thin films on p-FTO NH2 (CN x /p-FTO NH2 ) and nonaminosilanized p-FTO (CN x /p-FTO). CN x /p-FTO NH2 had a smaller density of trap states and passed 2.4 times the charges before failure compared to CN x /p-FTO. Additionally, a 40% decrease in interfacial charge transfer resistance at the CN x |electrolyte interface was measured for CN x /p-FTO NH2 compared to CN x /p-FTO under −0.5 V vs RHE in 0.1 M Na 2 SO 4 . Furthermore, with the CN x surface coated with a Pt cocatalyst, Pt/CN x /p-FTO NH2 exhibited faster hydrogen evolution rates and larger current densities than Pt/CN x /p-FTO. The highest Faraday efficiency toward electrochemical hydrogen evolution (FE H2 ) in 0.1 M Na 2 SO 4 (pH = 7) was 46.1%, 37.3%, 57.7%, and 70.5% for Pt/CN x /p-FTO NH2, Pt/CN x /p-FTO, CN x /p-FTO NH2, and CN x /p-FTO, respectively. The increase in hydrogen evolution rate did not follow the magnitude of the current density change, indicating electrochemical processes other than proton reduction. Overall, we have carefully investigated the CN x |FTO interface and suggested potential solutions to make CN x films better (photo)electrodes for (photo)electrochemical systems.
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) | 0.001 | 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 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".