Electrochemical properties of Pt-modified nano-honeycomb diamond electrodes

Honda, Kensuke; Yoshimura, Masahiro; Rao, Tata N.; Tryk, Donald A.; Fujishima, Akira; Yasui, Kanji; Sakamoto, Yasuhisa; Nishio, Kazuyuki; Masuda, Hideki

doi:10.1016/s0022-0728(01)00614-3

Cited by 127 publications

(65 citation statements)

References 42 publications

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“…15 Pt nanoparticles have been deposited on nanostructured BDD surfaces with larger electrochemical area for methanol anodic oxidation. 16 By both sputtering and electrodeposition, Wang and Swain have achieved the deposition of Pt nanoparticles on BDD films. 17 Notice also that Sine et al 18 have described microemulsion-synthesized Pt/ Ru/Sn nanoparticles on BDD for alcohol electrooxidation.…”

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confidence: 99%

Glucose Oxidase Entrapment in an Electropolymerized Poly(tyramine) Film with Sulfobutylether-β-Cyclodextrin on Platinum Nanoparticle Modified Boron-Doped Diamond Electrode

2008

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Glucose oxidase (GO) was entrapped in an electrodeposited poly(tyramine) film together with a negatively charged sulfobutylether--cyclodextrin (SBCD) on the active area of a platinum (Pt) nanoparticle modified boron-doped diamond (BDD) electrode. Electrodeposition of tyramine and simultaneous entrapment of GO/ SBCD were performed in 50 mM phosphate buffer, pH 7 containing 0.1 M tyramine, 1750 units GO, and 10 mM SBCD. Atomic force microscopy (AFM) imaging revealed the presence of semicircular nanofibers with a height of 40 nm and an averaged length of 795 nm throughout the electropolymerized film surface. The combined film of poly(tyramine) and SBCD served as an excellent matrix polymer for the GO immobilization with high stability, selectivity, and reproducibility. Sensitive and selective detection of H 2 O 2 was realized at +0.4 V vs 3 M Ag/AgCl, since the poly(tyramine)/SBCD film was capable of preventing the passage of electroactive uric and ascorbic acids to the electrode. The glucose biosensor exhibited a remarkably selective response to glucose with a detection limit of 10 µM, linearity up to 110 mM, and a response time of 2 s. Glutaraldehyde cross-linking of the film with entrapped GO completely eliminated electroactive interference caused by uric and ascorbic acids.

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confidence: 99%

Glucose Oxidase Entrapment in an Electropolymerized Poly(tyramine) Film with Sulfobutylether-β-Cyclodextrin on Platinum Nanoparticle Modified Boron-Doped Diamond Electrode

2008

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“…The low background current originating from the high crystallinity and flat surface offers high signal/noise ratio for electrochemical sensors and electroanalysis applications [2,3]. On the other hand, porous BDD with large surface area would be beneficial for electrocatalyst supports allowing high catalyst loadings [4]. High surface area would also be advantageous for electrolysis application, including waste water treatment [5], ozone [6] and NF 3 production [7], since higher utilization of the BDD electrode and operation at higher current density can be realized.…”

Section: Introductionmentioning

confidence: 99%

Steam activation of boron doped diamond electrodes

Ōhashi

Zhang

Takasu

et al. 2011

Electrochimica Acta

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Boron doped diamond (BDD) electrodes were activated in steam at various temperatures, resulting in high quality BDD electrodes with a porous microstructure. Distinct columnar structures were observed by scanning electron microscopy. The electrochemically active surface area of the steam-activated BDD was up to 20 times larger than the pristine BDD electrode owing to the porous texture. In addition, a widening of the potential window was observed after steam activation, suggesting that the quality of BDD was enhanced due to oxidative removal of graphitic impurities during the activation process.

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“…[10][11][12][13] In addition, modifications of the BDD surface have been employed for a number of specific applications. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Thus, Duo et al 14 have studied the deposition of small quantities of IrO 2 clusters on the BDD surface by a thermal decomposition technique and observed that the oxygen evolution reaction (OER) was dramatically enhanced with the surface modification. De Battisti et al 15 have reported Sol-Gel modifications of the BDD surface with RuO 2 and IrO 2 and used chlorine evolution as a model reaction to evaluated the effect of RuO 2 modification on BDD films.…”

Section: Introductionmentioning

confidence: 99%

“…The electrocatalytic activities for oxygen reduction and methanol oxidation at a boron-doped nanoporous honeycomb diamond films, modified with Pt nanoparticles by immersion of electrodes in a H 2 PtCl 6 aqueous solution and subsequent Pt reduction by a 3 hours exposure to flowing H 2 gas at 580 °C, was examined with cyclic voltammetry and electrochemical impedance spectroscopy in acid solution by Honda et al 23 These boron-doped nanoporous honeycomb diamond electrodes were also electrochemically characterized in non-aqueous electrolytes by Yoshimura et al 24 In other work, nanometer-size metal particles of Ag, Au, Pd and others with preferred crystalline textures were spontaneously deposited on a diamond thin film by Gao et al 25 The deposition was achieved after immersion in an acidic solution containing metal ions or complex metal ions and a significant enhancement of hydrogen evolution activity was observed on a diamond electrode modified by 9% coverage of Pd nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…This procedure yielded electrodes that retained over 90% of the coated material after one-thousand voltammetric cycles carried out between the water decomposition reactions. Thus, the use of the Sol-Gel method together with the application of a Nafion ® film on top of the coating preserved almost integrally the deposited platinum oxide.The electrocatalytic activities for oxygen reduction and methanol oxidation at a boron-doped nanoporous honeycomb diamond films, modified with Pt nanoparticles by immersion of electrodes in a H 2 PtCl 6 aqueous solution and subsequent Pt reduction by a 3 hours exposure to flowing H 2 gas at 580 °C, was examined with cyclic voltammetry and electrochemical impedance spectroscopy in acid solution by Honda et al 23 These boron-doped nanoporous honeycomb diamond electrodes were also electrochemically characterized in non-aqueous electrolytes by Yoshimura et al 24 In other work, nanometer-size metal particles of Ag, Au, Pd and others with preferred crystalline textures were spontaneously deposited on a diamond thin film by Gao et al 25 The deposition was achieved after immersion in an acidic solution containing metal ions or complex metal ions and a significant enhancement of hydrogen evolution activity was observed on a diamond electrode modified by 9% coverage of Pd nanoparticles.On the other hand, is well established in the literature that Sol-Gel is a feasible coating method and have been used for different purposes. Thus, Mattos-Costa et al 26 have constructed Ti/Ru x Ir 1-x O 2 electrodes to be used as anodes under extreme conditions and Suffredini et al 27 have prepared NiCo 2 O 4 coatings on Ni using the Sol-Gel method to produce an efficient material for oxygen evolution in alkaline media.…”

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confidence: 99%

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AFM studies and electrochemical characterization of boron-doped diamond surfaces modified with metal oxides by the Sol-Gel method

Suffredini¹,

Salazar‐Banda²,

Okamura³

et al. 2006

J. Braz. Chem. Soc.

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Com o objetivo de aprofundar investigações anteriores, foram realizadas modificações superficiais diretas em eletrodos de diamante dopados com boro (DDB), com óxidos metálicos (PtO x , RuO 2 , IrO 2 e PbO 2 ) e com alguns compósitos mistos, utilizando a técnica Sol-Gel. Estes materiais foram estudados por microscopia de força atômica (MFA) e os resultados indicaram a formação de sítios de deposição heterogênea. Técnicas eletroquímicas foram utilizadas para estabelecer a atividade catalítica para a reação de desprendimento de oxigênio (RDO) e para reação de oxidação de etanol em meio ácido utilizando os compósitos de PtO x e PtO x -RuO 2 . Testou-se ainda a estabilidade de um depósito de PtO x , recoberto por um filme de Nafion ® , por meio de operação contínua de longa duração. Estudos de voltametria cíclica comparativa mostraram que a área superficial ativa dos novos materiais mudou consideravelmente com o método de modificação proposto. O eletrodo de IrO 2 /BDD mostrou o melhor desempenho para a RDO, iniciando o processo de oxidação em ~ 1.4 V vs. HESS, valor este 200 mV menor do que o observado sobre um eletrodo de PtO x /BDD. Foi observada uma pequena perda da atividade do eletrodo de PtO x /BDD (6%) depois de realizada eletrólise de 4 horas, enquanto que 1000 ciclos voltamétricos deixaram a superfície praticamente inalterada. Os estudos realizados mostram que as atividades satisfatórias dos eletrodos preparados pelo método Sol-Gel podem constituir ferramentas interessantes de pesquisa, visando principalmente a utilização destes materiais em aplicações práticas.Continuing previous investigations, direct surface modifications of boron-doped diamond (BDD) electrodes with metal oxides (PtO x , RuO 2 , IrO 2 and PbO 2 ) and with some mixed composites were carried out by the Sol-Gel technique. The materials were studied by atomic force microscopy (AFM) to determine their surface topologies and by electrochemical techniques to establish the catalytic activity towards the oxygen evolution reaction (OER) and also, for the PtO x and PtO xRuO 2 composites, the ethanol oxidation reactions in acid media. The stability of PtO x coating covered by a Nafion ® film was also tested by long-term operation. The AFM results indicated sites of heterogeneous deposition and the electrochemical studies demonstrated that the active surface area changed considerably with the proposed method of modification. The IrO 2 /BDD electrode showed the best performance to the OER with the onset of the oxidation current at ~1.4 V, a value 200 mV lower than for the PtO x /BDD electrode. The enhanced stability of PtO x /BDD electrodes achieved by the application of a Nafion ® film and already reported in acid media was further proved using the ethanol oxidation reaction. Only a small loss of activity (6%) was observed after 4-hours electrolysis while one-thousand voltammetric cycles left the surface practically unchanged. In addition, preliminary studies for the same reaction on PtO x /BDD and PtO x -RuO 2 / BDD electrodes demonstrated the excell...

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Electrochemical properties of Pt-modified nano-honeycomb diamond electrodes

Cited by 127 publications

References 42 publications

Glucose Oxidase Entrapment in an Electropolymerized Poly(tyramine) Film with Sulfobutylether-β-Cyclodextrin on Platinum Nanoparticle Modified Boron-Doped Diamond Electrode

Glucose Oxidase Entrapment in an Electropolymerized Poly(tyramine) Film with Sulfobutylether-β-Cyclodextrin on Platinum Nanoparticle Modified Boron-Doped Diamond Electrode

Steam activation of boron doped diamond electrodes

AFM studies and electrochemical characterization of boron-doped diamond surfaces modified with metal oxides by the Sol-Gel method

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