Corresponding Author

Hong-hui WANG(whhui2006@163.com)


Neodymium (Nd) doped titanium (Ti)-based lead dioxide (PbO2) composite anode was prepared by electrodeposition. The surface morphologies and crystal structures of the as-prepared anodes were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) technique, respectively. The electrochemical performances of PbO2-Nd anode were studied by electrochemical impedance spectroscopy, linear sweep voltammetry and cyclic voltammetry. Additionally, the electrocatalytic activity and durability of PbO2-Nd anode were investigated through the degradation of simulative refractory organic wastewater of phenol. The results showed that Nd doping made the PbO2 anode surface structure dense and uniform with smaller sized crystal particles, which increased the specific surface area and improved the electrochemical properties of the anode. The surface crystal structures of PbO2 and PbO2-Nd anodes were mainly composed of β-PbO2. Furtheremore, Nd doping improved the crystal purity of β-PbO2, changed the relative abundance of the surface phase and promoted the formation of β(101) crystal plane. Moreover, the PbO2-Nd anode exhibited smaller electrochemical reaction resistance, higher oxygen evolution potential, stronger electron exchange capacity and longer life time than PbO2 anode. Upon electrocatalytic degradation of phenol wastewater with the PbO2-Nd anode for
3 h, the removal rate of phenol and COD reached 85.7% and 73.8%, respectively. The electrocatalytic activity of the PbO2-Nd anode had no significant attenuation after being used for 6 times. The PbO2-Nd anode possessed better electrocatalytic activity and durability than PbO2 anode.

Graphical Abstract


PbO2-Nd anode, electrochemical performance, electrocatalytic activity, durability

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