Electrode Characteristics of High Pressure Synthetic High Boron Doped Diamond

2006 ◽  
Vol 315-316 ◽  
pp. 507-510 ◽  
Author(s):  
Jian Bing Zang ◽  
Yan Hui Wang ◽  
W. Tang ◽  
H. Huang
Keyword(s):  
High Pressure ◽  
Carbon Sources ◽  
High Hardness ◽  
Diamond Powder ◽  
Grinding Wheel ◽  
Potential Range ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
High Boron ◽  
Electrode Characteristics

B-doped diamond is an excellent grinding material owing to its high hardness, oxidation resistance and chemical inertness as well as low resistance. The recent developments of Boron doped conductive diamond has further increased the scale of diamond applications including the manufacture of electrically conductive grinding wheel or the use as an electrode in EDM. The unique electrochemical properties also attract the researchers’ attention on the applications of electrode, sensor and detectors etc. This paper presents a viable technology that high boron doped diamond is synthesized under high pressure and high temperature using B-doped GICs as carbon sources. The synthetic diamond grains with electrically resistivity of 2cm are sufficiently conductive for electrochemistry measurement. Cyclic voltammotry was performed to evaluate the electrode characteristics of diamond powder. The results shows that B-doped diamond powder electrode is electrochemically stable in the supporting electrolytes such as 0.1M KCl, 0.5M Na2SO4 and 0.1M H2SO4 over a wide potential range. The level of background current is very low. The electrode reaction is quasi-reversible in 0.5M Na2SO4 containing the ferricyanide-ferrocyanide redox couple.

Rapid Electroanalytical Method for Determination of Nebivolol at a Boron-Doped Diamond Electrode

2015 ◽  
Vol 98 (6) ◽  
pp. 1535-1541 ◽  
Author(s):  
Biljana Nigović ◽  
Ana Mornar ◽  
Mario Završki
Keyword(s):  
High Speed ◽  
Comparative Method ◽  
Potential Range ◽  
Boron Doped Diamond ◽  
Buffer Solution ◽  
Diamond Electrode ◽  
Boron Doped ◽  
Boron Doped Diamond Electrode ◽  
Electroanalytical Method

Abstract A boron-doped diamond electrode provided a sensitive and cost-effective sensing platform for detection and quantitative determination of novel beta(1)-adrenergic receptor antagonist nebivolol. The net square-wave voltammetric response at 1.31 V related to the oxidation of nebivolol was obtained in Britton-Robinson buffer solution at pH 8. It increased linearly with the drug concentration in the range of 2.5 × 10–7 to 1.5 × 10–5 M. The LOD attained was 3.2 × 10–8 M. The practical analytical approach was illustrated by high speed quantification of nebivolol in a commercial pharmaceutical formulation. The RP-HPLC was selected as a comparative method for evaluating the proposed electroanalytical method. The newly developed method at the unmodified electrode surface was faster and simpler in comparison with HPLC (the retention time was 17.6 min), and only 6 s was necessary for direct voltammetric measurement in the potential range from 0.5 to 1.7 V with a 2 mV potential step and pulse frequency of 100 Hz.

Experiment Study on ELID Grinding of TN85 Cermets

2011 ◽  
Vol 175 ◽  
pp. 131-135
Author(s):  
Fu Qiang Tong ◽  
Fei Hu Zhang ◽  
Dian Rong Luan
Keyword(s):  
Metal Matrix ◽  
High Hardness ◽  
Diamond Powder ◽  
Diamond Wheel ◽  
Precision Machining ◽  
Grinding Wheel ◽  
Powder Particle Size ◽  
Matrix Composites ◽  
Elid Grinding ◽  
Ultra Precision

TN85 cermets is one kind of particle reinforced metal matrix composites, which is high hardness, good wear resistance, and bring great difficulties in processing, so it is necessary to study the processing performance. During the test on ELID grinding TN85 cermets, it is found that plastic removal is the main ways during grinding TN85 cermets materials. The powder particle size of W2.5 diamond wheel is successfully used in full removal of TN85 cermets plastic, the surface roughness value of rms: 16.81nm and Ra: 12.52nm. The results showed that: ELID grinding wheel with diamond powder technology can be used in ultra-precision machining TN85 cermets.

scholarly journals Boron-doped diamond powder (BDDP)-based polymer composites for dental treatment using flexible pinpoint electrolysis unit

2016 ◽  
Vol 68 ◽  
pp. 49-53 ◽  
Author(s):  
Tsuyoshi Ochiai ◽  
Shoko Tago ◽  
Mio Hayashi ◽  
Kazuo Hirota ◽  
Takeshi Kondo ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Dental Treatment ◽  
Diamond Powder ◽  
Boron Doped Diamond ◽  
Boron Doped

Boron-doped diamond synthesized at high-pressure and high-temperature with metal catalyst

2017 ◽  
Vol 103 ◽  
pp. 224-237 ◽  
Author(s):  
Fedor M. Shakhov ◽  
Andrey M. Abyzov ◽  
Sergey V. Kidalov ◽  
Andrei A. Krasilin ◽  
Erkki Lähderanta ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Metal Catalyst ◽  
Boron Doped Diamond ◽  
Boron Doped

Boron-Doped Diamond Powder as a Durable Support for Platinum-Based Cathode Catalysts in Polymer Electrolyte Fuel Cells

2018 ◽  
Vol 165 (6) ◽  
pp. F3072-F3077 ◽  
Author(s):  
Takeshi Kondo ◽  
Mihoko Kikuchi ◽  
Hidetake Masuda ◽  
Fumiya Katsumata ◽  
Tatsuo Aikawa ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Diamond Powder ◽  
Polymer Electrolyte Fuel Cells ◽  
Boron Doped Diamond ◽  
Cathode Catalysts ◽  
Boron Doped

scholarly journals High Pressure High Temperature Synthesis of Highly Boron Doped Diamond Microparticles and Porous Electrodes for Electrochemical Applications

2020 ◽  
Author(s):  
Georgia Wood ◽  
Mark Newton ◽  
Viacheslav Shkirskiy ◽  
Patrick R. Unwin ◽  
Julie Macpherson ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Chemical Vapor ◽  
Porous Electrodes ◽  
Boron Doped Diamond ◽  
Voltammetric Analysis ◽  
Boron Doped ◽  
Electrochemical Applications ◽  
High Pressure High Temperature ◽  
Aqueous Solvent

<p>High pressure high temperature (HPHT) synthesis of crystallographically well-defined boron doped diamond (BDD) microparticles, suitable for electrochemical applications and using the lowest P and T (5.5 GPa and 1200°C) growth conditions to date, is reported. This is aided through the use of a metal (Fe-Ni) carbide forming catalyst and an aluminum dibromide (AlB<sub>2</sub>) boron source. The latter also acts as a nitrogen sequester, to reduce boron-nitrogen charge compensation effects. Raman microscopy and electrochemical measurements on individual microparticles reveal they are suitably doped to be considered metallic-like and contain negligible sp<sup>2</sup> bonded carbon. A compaction process is used to create macroscopic porous electrodes from the BDD microparticles. Voltammetric analysis of the one-electron reduction of Ru(NH<sub>3</sub>)<sub>6</sub><sup>3+</sup> reveals large capacitive and resistive components to the current-voltage curves, originating from solution trapped within the porous material. Scanning electrochemical cell microscopy (SECCM) is employed to map the local electrochemical activity and porosity at the micron scale. These electrodes retain the advantageous properties of polycrystalline BDD grown by chemical vapor deposition, such as large aqueous solvent window and resistance to corrosion, but with the additional benefits of a high, electrochemically accessible, surface area. </p>

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