Electrochemical performance and behavior of nickel pig Iron anodic electrolysis for enhanced sulfuric acid leaching
This study presents an innovative electrochemical method for producing ultra-fine Nickel Pig Iron (NPI) powders through anodically induced overpotential electrolysis, achieving a significantly high surface area and exceptional sulfuric acid leaching efficiency. Nickel, a critical material for energy...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-08-01
|
| Series: | Electrochemistry Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248125000761 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | This study presents an innovative electrochemical method for producing ultra-fine Nickel Pig Iron (NPI) powders through anodically induced overpotential electrolysis, achieving a significantly high surface area and exceptional sulfuric acid leaching efficiency. Nickel, a critical material for energy applications, faces increasing supply constraints, leading to greater reliance on intermediates like nickel sulfate. Conventional high-pressure acid leaching (HPAL) processes, while effective, suffer from high operational costs and excessive acid waste generation. To address these challenges, this study employs anodic oxidation of NPI under high-voltage conditions (≥10 V), facilitating particle refinement and enhanced electrochemical reactivity. Electrochemical characterizations, including cyclic voltammetry, chronoamperometry, and Pourbaix diagram analysis, confirm the formation of oxidized Ni-rich phases at optimal voltage ranges with peak current exceeding 10 A. The resulting fine NPI powders exhibit a leaching efficiency surpassing 95 % in 2 mol/L sulfuric acid at ambient temperature and pressure, demonstrating their potential as a cost-effective alternative to HPAL. Further post-process evaluations reveal critical electrolysis parameters influencing oxidation behavior and leaching performance, providing key insights for optimizing nickel extraction via anodic electrolysis. |
|---|---|
| ISSN: | 1388-2481 |