|
| Electrodeposition Mechanism of Trivalent Antimony |
|
Received:February 09, 2011
|
| View Full Text View/Add Comment Download reader |
| DOI：DOI：10.3969/j.issn.1007-7545.2011.05.002 |
| KeyWord:H2SO4-NH4F-SbF3 Electrolyte System；Antimony；Electrochemical kinetics |
| Author | Institution |
| LIN Yan |
昆明理工大学材料与冶金工程学院 |
| XIE Gang |
云南冶金集团股份有限公司技术中心 |
| YANG Da-jin |
云南冶金集团股份有限公司技术中心 |
|
| Hits: 2824 |
| Download times: 58 |
| Abstract: |
| The reduction mechanism of Sb3+ in H2SO4-NH4F-SbF3 electrolyte system was studied by means of electrochemical methods, including chronopotentiometry and alternating current impedance. Analysis of potential-time transients clearly shows that antimony (Ⅲ) could be reduced to antimony metal via two-steps irreversible electron transfer process in H2SO4-NH4F-SbF3 system. The relationship between iτ1/2 and i calculated by chronopotentiometry indicates that the trivalent antimony complex undergoes chemical transformation reaction before its reduction in the cathode. The impedance results confirm the above conclusion and indicate that the adsorption states which are the middle product of trivalent antimony have different influences on two electron transfer steps. |
| Close |