Effect of the boron content on the steam activation of boron-doped diamond electrodes

Zhang, Xiangwen; Nakai, Takaaki; Uno, Masatoshi; Nishiki, Yoshinori; Sugimoto, Wataru

doi:10.1016/j.carbon.2013.08.015

Cited by 27 publications

(19 citation statements)

References 31 publications

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“…A similar phenomenon was also observed in the case of H2O etching of conductive boron-doped diamond (BDD), where steam activation of BDD lead to preferential etching of the {111} planes [13,14]. In addition to O2 and H2O, CO2 is also a common oxidative etchant.…”

Section: Introductionmentioning

confidence: 73%

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Preferential {100} etching of boron-doped diamond electrodes and diamond particles by CO2 activation

Zhang

Nakai²,

Uno³

et al. 2014

Carbon

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The etching behavior of polycrystalline boron-doped diamond (BDD) electrodes and diamond particles with gaseous CO2 at 800 and 900 °C was investigated by field-emission scanning electron microscopy, atomic force microscopy and X-ray photoelectron spectroscopy. Polycrystalline BDD (800 ppm), composed of a mixture of cubic {100} and triangular {111} orientated planes, was used so as to pursue the possibility of preferential etching by high temperature CO2 treatment. Nanometer sized pits were observed on the {100} planes while no change was observable for the {111} planes when the activation temperature was 800 °C. The difference in the etching behavior by CO2 with regard to the different planes was clarified using diamond particles and comparing with steam activation. The results demonstrate that CO2 activation leads to preferential {100} etching, whereas steam-activation results in preferential {111} etching.3

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Section: Introductionmentioning

confidence: 73%

“…These studies motivated us to study the CO2 activation of boron-doped diamond. We anticipated that in contrast to the {111} etching observed by steam activation in boron-doped diamond [13,14], CO2 activation may lead to preferential etching of the {100} planes.…”

Section: Introductionmentioning

confidence: 99%

Preferential {100} etching of boron-doped diamond electrodes and diamond particles by CO2 activation

Zhang

Nakai²,

Uno³

et al. 2014

Carbon

Self Cite

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show abstract

“…All electrochemical measurements were performed at 25 °C, with 0.1 M Na 2 SO 4 aqueous solution as the electrolyte, using a CHI660E (Shanghai Chenhua) electrochemical work station. The broad peak at 580.7 cm −1 is known to be related to phonon scattering by B induced structural modifications [28]. This proved that B atoms had been incorporated into the diamond lattice.…”

Section: Page 7 Of 30mentioning

confidence: 97%

Preparation of TiO2/boron-doped diamond/Ta multilayer films and use as electrode materials for supercapacitors

Shi

et al. 2015

Applied Surface Science

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“…High-temperature treatment is also one of the reported routes to modify and oxidize the surface termination of BDD electrodes [17][18][19]. Other approaches include oxidation under electrochemical polarization [20,21], chemical agents [22,23], ozone [24], plasma and/or UV treatment [25,26], but also natural aging in air [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Oxidation of Heavy Boron-Doped Diamond Electrodes: Microstructural and Electrochemical Performance Modification

et al. 2020

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In this work, we reveal in detail the effects of high-temperature treatment in air at 600 °C on the microstructure as well as the physico-chemical and electrochemical properties of boron-doped diamond (BDD) electrodes. The thermal treatment of freshly grown BDD electrodes was applied, resulting in permanent structural modifications of surface depending on the exposure time. High temperature affects material corrosion, inducing crystal defects. The oxidized BDD surfaces were studied by means of cyclic voltammetry (CV) and scanning electrochemical microscopy (SECM), revealing a significant decrease in the electrode activity and local heterogeneity of areas owing to various standard rate constants. This effect was correlated with a resultant increase of surface resistance heterogeneity by scanning spreading resistance microscopy (SSRM). The X-ray photoelectron spectroscopy (XPS) confirmed the rate and heterogeneity of the oxidation process, revealing hydroxyl species to be dominant on the electrode surface. Morphological tests using scanning electron microscopy (SEM) and atomic force microscopy (AFM) revealed that prolonged durations of high-temperature treatment lead not only to surface oxidation but also to irreversible structural defects in the form of etch pits. Our results show that even subsequent electrode rehydrogenation in plasma is not sufficient to reverse this surface oxidation in terms of electrochemical and physico-chemical properties, and the nature of high-temperature corrosion of BDD electrodes should be considered irreversible.

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Effect of the boron content on the steam activation of boron-doped diamond electrodes

Cited by 27 publications

References 31 publications

Preferential {100} etching of boron-doped diamond electrodes and diamond particles by CO2 activation

Preferential {100} etching of boron-doped diamond electrodes and diamond particles by CO2 activation

Preparation of TiO2/boron-doped diamond/Ta multilayer films and use as electrode materials for supercapacitors

High-Temperature Oxidation of Heavy Boron-Doped Diamond Electrodes: Microstructural and Electrochemical Performance Modification

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