Electrochemical behavior of isofraxidin at an electrodeposition reduced graphene oxide electrode and its analytical application

Wu, Junjun; Wang, Lu; Xie, Zhengkun; Zou, Lina; Ye, Baoxian

doi:10.1039/c5ay02760h

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…Notably, electrodeposition is a low-cost, scalable method for producing high-purity metal layers with exact control (thickness, shape, and homogeneity) and great efficiency. − Ho et al studied the Pt coating on a Ti bipolar plate by applying an electrochemical deposition process, and a thin layer of Pt could reduce the resistance by prohibiting the formation of a passive oxide layer and corrosion on the surface …”

Section: Introductionmentioning

confidence: 99%

Au Nanoparticle–polypyrrole Composite Coatings with Enhanced Conductivity and Corrosion Resistance for Ti-Based Porous Transport Layer Anodes in Proton Exchange Membrane Water Electrolysis

Liu,

Wang,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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Nowadays, Ti-based materials are used as the construction materials of anode porous transport layers (PTLs) in proton exchange membrane water electrolysis (PEM WE). The major limiting factors of Ti anodes include passivation and corrosion. Herein, the challenges are addressed by using selective pulsed electrodeposition (PE), preparing orientated Au nanoparticles (AuNPs) and a degradable polypyrrole (PPy) composite coating (PE-Au/PPy coating) on Ti-based PTLs. The PTL treatment consists of four steps: electropolymerizing of PPy, mechanical polishing of PPy outside the pores of Ti felts, acid etching, and final electrodepositing AuNPs. Testing results show that etched Ti enables AuNPs to be preferentially deposited on the active surface to make the PE-Au/PPy coating highly conductive, effectively inhibiting Ti passivation. PPy formed a conductivity difference with highly active acid-etched Ti, promoting the preferential deposition of AuNPs on the active Ti surface, which improves noble metal utilization. The PE-Au/PPy coating presents a low interfacial contact resistance (ICR) (ca. 0.9 mΩ cm 2 at 140 N cm −2 ) and excellent corrosion resistance (0.17 μA cm −2 ) in the simulated PEM WE environments. Significantly, the PE-Au/PPy coating exhibits high electrochemical properties and ultralong lifespans of over 1000 h, still with a low ICR (1.5 mΩ cm 2 ), further validating the usefulness of the protective layer. In addition, here the preferential deposition process of AuNPs on the Ti surface is analyzed using X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR), clarifying the protective mechanisms in PE-Au/PPy coating. Overall, this work not only shows the great potential of PE-Au/PPy coating as PTL anode materials but also optimizes noble metal utilization.

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Section: Introductionmentioning

confidence: 99%

Au Nanoparticle–polypyrrole Composite Coatings with Enhanced Conductivity and Corrosion Resistance for Ti-Based Porous Transport Layer Anodes in Proton Exchange Membrane Water Electrolysis

Liu,

Wang,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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show abstract

Direct fabrication of gas diffusion cathode by pulse electrodeposition for proton exchange membrane water electrolysis

Park

Choe

Kim

et al. 2018

Applied Surface Science

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Electrochemically reduced graphene oxide: Preparation, composites, and applications

Zhou

Bai

Hong

et al. 2022

Carbon

104

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Electrochemical behavior of isofraxidin at an electrodeposition reduced graphene oxide electrode and its analytical application

Abstract: A highly sensitive voltammetric sensor ERGO/GCE was constructed and used for sensitive detection of isofraxidin. Then the electrochemical behavior of isofraxidin was carefully investigated for the first time and a possible reaction mechanism was proposed.

Cited by 4 publications

References 34 publications

Au Nanoparticle–polypyrrole Composite Coatings with Enhanced Conductivity and Corrosion Resistance for Ti-Based Porous Transport Layer Anodes in Proton Exchange Membrane Water Electrolysis

Au Nanoparticle–polypyrrole Composite Coatings with Enhanced Conductivity and Corrosion Resistance for Ti-Based Porous Transport Layer Anodes in Proton Exchange Membrane Water Electrolysis

Direct fabrication of gas diffusion cathode by pulse electrodeposition for proton exchange membrane water electrolysis

Electrochemically reduced graphene oxide: Preparation, composites, and applications

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