Well-dispersed Pt nanoparticles on polydopamine-coated ordered mesoporous carbons and their electrocatalytic application.
Polydopamine (PDA)-coated ordered mesoporous carbons (OMCs) are easily prepared through one-step self-polymerization of dopamine on OMCs matrix at room temperature. Pt nanoparticles (NPs) are deposited on OMCs-PDA via a simple chemical reduction. The PDA layer helps to improve the water-solubility and dispersibility of OMCs, and plays a key role in the deposition of uniform and well-distributed Pt NPs. Transmission electron microscopy images reveal that the ultra-fine Pt NPs with an average size of ~1.8 nm are well-dispersed on the surface of OMCs-PDA. The electrocatalytic behavior of OMCs-PDA/Pt modified glassy carbon (GC) electrode is investigated by cyclic voltammetry and current-time methods using hydrogen peroxide (H2O2) and hydrazine (N2H4) as redox probes. Results show that OMCs-PDA/Pt exhibits improved electrocatalytic activity towards H2O2 reduction and N2H4 oxidation compared with OMCs/Pt. The linear electro-redox responses are found for H2O2 and N2H4 in the range of 2-14324 μM and 1-229 μM with the detection limit (S/N=3) of 0.85 μM and 0.51 μM, respectively. In addition, this new nanocomposite modified electrode exhibits high sensitivity, good anti-interference ability, excellent reproducibility and long-term stability.
Faculty of Chemistry, Northeast Normal University, Changchun 130024, PR China.
Lijiao
L
Yan
Faculty of Chemistry, Northeast Normal University, Changchun 130024, PR China.
Xiangjie
X
Bo
Faculty of Chemistry, Northeast Normal University, Changchun 130024, PR China.
Dongxia
D
Zhu
Faculty of Chemistry, Northeast Normal University, Changchun 130024, PR China. Electronic address: guolp078@nenu.edu.cn.
Liping
L
Guo
D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D004298:Dopamine / Q000737:chemistry; D055664:Electrochemical Techniques / Q000379:methods; D004566:Electrodes; D006834:Hydrazines / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000032:analysis*; D007211:Indoles / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010984:Platinum / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D015203:Reproducibility of Results; D012995:Solubility
D006834:Hydrazines; D007211:Indoles; D011108:Polymers; C568283:polydopamine; C029424:hydrazine; D010984:Platinum; D002244:Carbon; D006861:Hydrogen Peroxide; D004298:Dopamine
Hydrazine; Hydrogen peroxide; Ordered mesoporous carbons; Polydopamine; Pt nanoparticles