Preparation and Electrocatalytic Property of PbO₂-CeO₂Nanocomposite Electrodes by Pulse Reverse Electrodeposition Methods

Abstract

PbO2-CeO2 nanocomposite electrodes were prepared by pulse reverse electrodeposition in the lead nitrate solution containing CeO2 nanoparticles. The effect of pulse reverse electrodeposition parameters, such as reverse pulse frequency, reverse peak current density and reverse duty cycle, on the content of CeO2 nanoparticles in the PbO2-CeO2 nanocomposite electrodes was investigated. The SEM and XRD tests show that PbO2-CeO2 nanocomposite electrodes possess finer grain size than PbO2-CeO2 nanocomposite electrodes (P) by pulse electrodeposition and PbO2-CeO2 nanocomposite electrodes (D) by direct current electrodeposition. The service life of PbO2-CeO2 nanocomposite electrodes can reach 285 h, which is 1.3 times longer than that of PbO2-CeO2 electrodes (P), and 2.3 times longer than that of PbO2-CeO2 electrodes (D). The electrochemical measurements show that PbO2-CeO2 nanocomposite electrodes possess highest oxygen evolution overpotential and largest electrochemical active surface area among these electrodes. The electrocatalytic property of PbO2-CeO2 nanocomposite electrodes was examined for the electrochemical degradation of methylene blue (MB). The bulk electrolysis shows that PbO2-CeO2 nanocomposite electrodes exhibit the highest COD removal efficiency and lowest energy consumption, which can be ascribed to the highest oxygen evolution overpotential, largest electrochemical active surface area and highest CeO2 content.

Synthesis and Characterization of Novel NiW–CeO2 Composite Coating with Enhanced Corrosion and Wear Resistance

“…Among MMCs, nickel-based alloys have been widely used in different industrial applications due to their outstanding performance and low cost [1]. Among various fabrication techniques, electrodeposition is one of the most common method of producing various metal matrix coatings [1][2][3][4][5][6][7]. The reinforcing phases (insoluble materials) are suspended in a conventional electrodeposition bath and co-deposited within the metal matrix during the electrodeposition process.…”

“…These insoluble components can be in the form of powder, fiber or encapsulated particles. The electrodeposition of various Ni-based composites has been reported in which one or more of various metallic oxides such as CeO 2 , ZrO 2 , Al 2 O 3 , TiO 2 , MoO 2 and carbides such as SiC were added into Ni-based electrodeposition baths [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Substantial improvements were observed in material properties such as micro-hardness, wear, and corrosion resistance as a result of the co-deposition of reinforcements phase(s) into the Ni matrix [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

“…The electrodeposition of various Ni-based composites has been reported in which one or more of various metallic oxides such as CeO 2 , ZrO 2 , Al 2 O 3 , TiO 2 , MoO 2 and carbides such as SiC were added into Ni-based electrodeposition baths [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Substantial improvements were observed in material properties such as micro-hardness, wear, and corrosion resistance as a result of the co-deposition of reinforcements phase(s) into the Ni matrix [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The degree of improvements in the properties depends on various factors such as the type and content of the reinforcement particles as well as their uniformity in distribution within the Ni-based matrix, electrodeposition parameters such as the operating temperature, agitation modes, applied current density, plating duration, and electrolyte formulation (i.e., type and concentration of ingredients) [1][2][3][4][5][6][7][8][9]…”

“…Substantial improvements were observed in material properties such as micro-hardness, wear, and corrosion resistance as a result of the co-deposition of reinforcements phase(s) into the Ni matrix [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The degree of improvements in the properties depends on various factors such as the type and content of the reinforcement particles as well as their uniformity in distribution within the Ni-based matrix, electrodeposition parameters such as the operating temperature, agitation modes, applied current density, plating duration, and electrolyte formulation (i.e., type and concentration of ingredients) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Fabrication and characterization of titanium‐based lead dioxide electrode by electrochemical deposition with Ti4O7 particles

“…For instance, Yao et al used electrochemical co‐deposition method to dope CeO 2 (Yao, Dong, Jiao, Yu, & He, 2016; Yao et al., 2015, 2018) and ZrO 2 (Yao, Ren, Yang, Huang, & Li, 2019; Yao, Zhao, Zhao, & Zhang, 2014; Yingwu, Chunjiao, Xin, Feng, & Huailiang, 2017) particles into PbO 2 coating and studied the influence of those metal oxide particles on the electrode performance. The results indicated that the doping of CeO 2 and ZrO 2 particles can effectively improve the oxygen evolution over‐potential and strengthen the service life of electrode.…”