title: Dual-functional Pt-on-Pd supported on reduced graphene oxide hybrids: peroxidase-mimic activity and an enhanced electrocatalytic oxidation characteristic.
abstract: In this study, a facile hydrothermal method was developed to synthesize Pt-on-Pd supported on reduced graphene oxide (Pt-on-Pd/RGO) hybrids. Because of the synergistic effect between Pt-on-Pd and RGO, the obtained Pt-on-Pd/RGO had superior peroxidase-mimic activities in H2O2 reduction and TMB oxidation. The reaction medium was optimized and a sensing approach for H2O2 was developed with a linear range from 0.98 to 130.7 μM of H2O2. In addition, the characteristic of electrocatalytic oxidation of methanol was investigated. The peak current density value, j(f), for the Pt-on-Pd/RGO hybrid (328 mA mg(Pt)(-1)) was about 1.85 fold higher than that of commercial Pt black (177 mA mg(Pt)(-1)) and, also, more durable electrocatalytic activity could be obtained. For the first time, the dual-functional Pt-on-Pd/RGO with peroxidase-mimic activity and an enhanced electrocatalytic oxidation characteristic was reported.
authors.affiliation: Department of Chemical and Material Engineering, Longyan College, Longyan 364000, Fujian, China.
authors.forename: Xiahong
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China.
authors.forename: Genghuang
authors.initials: G
authors.lastname: Wu
authors.affiliation: Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China.
authors.forename: Zhixiong
authors.initials: Z
authors.lastname: Cai
authors.affiliation: Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China. Electronic address: xichen@xmu.edu.cn.
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
mesh_terms: D001560:Benzidines / Q000737:chemistry; D002384:Catalysis; D004563:Electrochemistry; D006108:Graphite / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D009195:Peroxidase; D010984:Platinum / Q000737:chemistry*
chemical_list: D001560:Benzidines; D010087:Oxides; C021758:3,3',5,5'-tetramethylbenzidine; D010984:Platinum; D010165:Palladium; D006108:Graphite; D006861:Hydrogen Peroxide; D009195:Peroxidase; D000432:Methanol
keywords: Fuel cell; H(2)O(2); Peroxidase-mimic; PtPd; Reduced graphene oxide