TY - JOUR
T1 - Preparation and electrochemical properties of Al/TiB2/β-PbO2 layered composite electrode materials for electrowinning of nonferrous metals
AU - Han, Zhaohui
AU - Xu, Lei
AU - Kannan, Chandrasekar Srinivasa
AU - Liu, Jianhua
AU - Koppala, Sivasankar
AU - Ju, Shaohua
AU - Zhang, Libo
N1 - Funding Information:
This work was financially supported by the National Natural Science Foundation of China (Grant No. 51264025) and Yunnan Science and Technology Major Project (Grant No. 2018ZE008 and Grant No. 2018ZE027).
Funding Information:
This work was financially supported by the National Natural Science Foundation of China (Grant No. 51264025 ) and Yunnan Science and Technology Major Project (Grant No. 2018ZE008 and Grant No. 2018ZE027 ).
Publisher Copyright:
© 2018 Elsevier Ltd and Techna Group S.r.l.
PY - 2018/10/15
Y1 - 2018/10/15
N2 - In this paper, an Al/TiB2 layered composite was prepared by plasma spraying for use as the base material to reduce resistivity and improve electrochemical performance in an electrode. The β-PbO2 coating was prepared by electrochemical deposition. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to study the Al/TiB2 composite and the β-PbO2 coating. The electrochemical performance of the Al/TiB2/β-PbO2 and Ti/β-PbO2 composites was studied by linear sweep voltammetry (LSV), Tafel polarization curves (Tafel) and electrochemical impedance spectroscopy (EIS). The results indicate that Al/TiB2/β-PbO2 composite electrode materials with a uniform structure were successfully prepared by plasma spraying and electrochemical deposition. The structure of the Al/TiB2 composite improves the conductivity of the electrode matrix, the optimal value of conductivity is 2.76 × 107 S m−1, and the optimal value of density is 8.758 g cm−3 for β-PbO2 coating. The composite also decreases the charge resistance in the double layer structure of the electrode surface, accelerating the charge transfer rate. Compared with the Ti matrix, the Al/TiB2/β-PbO2 exhibited the best corrosion-resistant performance and electrochemical catalytic activity for electrowinning of nonferrous metals.
AB - In this paper, an Al/TiB2 layered composite was prepared by plasma spraying for use as the base material to reduce resistivity and improve electrochemical performance in an electrode. The β-PbO2 coating was prepared by electrochemical deposition. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to study the Al/TiB2 composite and the β-PbO2 coating. The electrochemical performance of the Al/TiB2/β-PbO2 and Ti/β-PbO2 composites was studied by linear sweep voltammetry (LSV), Tafel polarization curves (Tafel) and electrochemical impedance spectroscopy (EIS). The results indicate that Al/TiB2/β-PbO2 composite electrode materials with a uniform structure were successfully prepared by plasma spraying and electrochemical deposition. The structure of the Al/TiB2 composite improves the conductivity of the electrode matrix, the optimal value of conductivity is 2.76 × 107 S m−1, and the optimal value of density is 8.758 g cm−3 for β-PbO2 coating. The composite also decreases the charge resistance in the double layer structure of the electrode surface, accelerating the charge transfer rate. Compared with the Ti matrix, the Al/TiB2/β-PbO2 exhibited the best corrosion-resistant performance and electrochemical catalytic activity for electrowinning of nonferrous metals.
KW - Al/TiB/β-PbO electrode
KW - Electrical properties
KW - Layered structures
KW - Metal ceramic
UR - http://www.scopus.com/inward/record.url?scp=85049654041&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2018.07.059
DO - 10.1016/j.ceramint.2018.07.059
M3 - Article
AN - SCOPUS:85049654041
SN - 0272-8842
VL - 44
SP - 18420
EP - 18428
JO - Ceramics International
JF - Ceramics International
IS - 15
ER -