Electrochemical characterization of porous boron-doped diamond prepared using SiO2 fiber template

Vlčková Živcová, Zuzana; Mortet, Vincent; Taylor, Andrew; Zukal, Arnošt; Frank, Otakar; Kavan, Ladislav

doi:https://dx.doi.org/10.1016/j.diamond.2018.05.007

Number of the records: 1

Electrochemical characterization of porous boron-doped diamond prepared using SiO2 fiber template

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SYSNO ASEP	0489826
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Electrochemical characterization of porous boron-doped diamond prepared using SiO2 fiber template
Author(s)	Vlčková Živcová, Zuzana (UFCH-W)_{RID, ORCID} Mortet, Vincent (FZU-D)_{RID, ORCID} Taylor, Andrew (FZU-D)_{RID, ORCID} Zukal, Arnošt (UFCH-W)_RID Frank, Otakar (UFCH-W)_{RID, ORCID} Kavan, Ladislav (UFCH-W)_{RID, ORCID}
Source Title	Diamond and Related Materials. - : Elsevier - ISSN 0925-9635 Roč. 87, AUG 2018 (2018), s. 61-69
Number of pages	9 s.
Language	eng - English
Country	CH - Switzerland
Keywords	Porous boron-doped diamond ; Roughness factor ; Cyclic voltammetry
Subject RIV	CG - Electrochemistry
OECD category	Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Subject RIV - cooperation	Institute of Physics - Solid Matter Physics ; Magnetism
R&D Projects	GA13-31783S GA ČR - Czech Science Foundation (CSF)
Institutional support	UFCH-W - RVO:61388955 ; FZU-D - RVO:68378271
UT WOS	000445294200009
EID SCOPUS	85048710165
DOI	10.1016/j.diamond.2018.05.007
Annotation	Porous boron-doped diamond (BDD) is fabricated by consecutive plasma enhanced chemical vapor deposition on a 3D porous SiO2 fiber template deposited by spin coating (SC). The fabricated highly doped and mechanically stable porous BDD layers are characterized by scanning electron microscopy (SEM) and Raman spectroscopy. The roughness factor of the prepared porous BDD, depending on the number of porous layers, was determined from cyclic voltammetry (RFCV) and from krypton adsorption isotherms - BET, (RFBET). Differences in determination of the roughness factor using these two methods are discussed. Electrochemical measurements (cyclic voltammetry and galvanostatic charge/discharge cycling) of porous BDD are performed in aqueous electrolyte solutions with different composition and pH values. The highest electric double-layer capacitance of ca. 2 mu F.cm(-2) , related to the projected geometric (2D) surface area, is obtained for the thickest (26 pm) porous BDD electrode measured in 0.5 M H2SO4 electrolyte solution. The capacitance of the same porous BDD normalized to the total physical surface area (3D) determined by BET is 45 mu F.cm(-2). The electrocatalytic activity of porous BDD electrodes is studied using a hexaammineruthenium(III/II) redox probe, and the electrochemical cycle stability is determined by galvanostatic charge/discharge. The charge retention of the thickest porous BDD samples after removal of non-diamond impurities by an oxidative treatment is ca. 77% after 3000 cycles.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2019

Number of the records: 1