Study of Manganese and Phosphoric Acid on Dimensionally Stable Anodes During Zinc Electrowinning
Bibliographic record
Abstract
ABSTRACT During zinc electrowinning, the manganese oxide covers the surfaces of the dimensionally stable anodes (DSA) and decreases their electrocatalytic performance. Phosphoric acid is added into the zinc electrolyte to complex the manganic ion and hence reduce its disproportionation to MnO 2 . In the investigation, electrochemical measurements were carried out to examine electrochemical behavior of DSA (Ti/IrO 2 –Ta 2 O 5 ) anode during zinc electrolysis at 48 mA.cm −2 and 39°C. It is observed that the anodic potentials of DSA anodes are much lower after 5 h polarization in the zinc electrolyte containing 35 mL.L −1 phosphoric acid at 39°C than that without phosphoric acid. Also, the current efficiencies increase after addition of phosphoric acid to the zinc electrolyte containing 9 g.L −1 Mn 2+ . Electrochemical noise and impedance measurements show that addition of 35 mL.L −1 H 3 PO 4 to the zinc electrolyte increases the corrosion resistances during polarization. Addition of phosphoric acid to the zinc electrolytic can increase the oxidation peak by cyclic voltammetry study and improve the electrocatalytic behavior of DSA anodes.
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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".