title: Electrocatalytic degradation kinetic of 4-chlorophenol by the Pd/C gas-diffusion electrode system.
abstract: A Pd/C gas-diffusion cathode which generated H2O2 through a two-electron reduction process of fed oxygen molecule was used to degrade 4-chlorophenol in an undivided electrolysis device. The kinetics of 4-chlorophenol degradation has been investigated by the electrochemical oxidation processes. By inspecting the relationship between the rate constants (k) and inﬂuencing factors, using ﬁrst-order kinetics to describe the electrochemical oxidation process of 4-chlorophenol, a kinetic model of 4-chlorophenol degradation process was proposed to calculate the 4-chlorophenol efﬂuent concentration: C = C0 exp( -3:76 × 10(-6) C(-0.5)0 J(2) M(-0.7) Q(0.17) Dt). It was found that the electrocatalytic degradation rate of 4-chlorophenol was affected by current density, electrode distance, air-feeding rate, electrolyte concentration and initial 4-chlorophenol concentration. The kinetics obtained from the experiments under corresponding electrochemical conditions could provide an accurate estimation of 4-chlorophenol efﬂuent concentration and lead to better design of the electrochemical reactor.
authors.affiliation: College of Water Sciences, Beijing Normal University, Beijing 100875, China. bian@bnu.edu.cn
authors.forename: Z Y
authors.initials: ZY
authors.lastname: Bian
authors.forename: Y
authors.initials: Y
authors.lastname: Bian
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.forename: L
authors.initials: L
authors.lastname: Pang
authors.forename: A Z
authors.initials: AZ
authors.lastname: Ding
mesh_terms: D000388:Air; D002244:Carbon / Q000737:chemistry*; D002733:Chlorophenols / Q000737:chemistry*; D004566:Electrodes; D004572:Electrolysis; D004573:Electrolytes / Q000737:chemistry; D007700:Kinetics; D008956:Models, Chemical; D010165:Palladium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D002733:Chlorophenols; D004573:Electrolytes; D014874:Water Pollutants, Chemical; C029107:4-chlorophenol; D010165:Palladium; D002244:Carbon