Synthetic boron-doped carbonado, a new electrode material: synthesis in C–metal–B growth systems aimed at the lowering of the synthesis temperature without loss of electrochemical activityстатья

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Дата последнего поиска статьи во внешних источниках: 4 октября 2018 г.

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[1] Synthetic boron-doped carbonado, a new electrode material: synthesis in c–metal–b growth systems aimed at the lowering of the synthesis temperature without loss of electrochemical activity / Y. V. Pleskov, M. D. Krotova, K. I. Maslakov et al. // Journal of Solid State Electrochemistry. — 2018. — Vol. 22, no. 10. — P. 3129–3136. New electrode material—boron-doped synthetic carbonado (bulk polycrystalline diamond)—was synthesized at high pressures and high temperatures in the C–metal (Co, Ni, or Fe) –B growth systems. The metal borides were used as the growth medium-forming substances for graphite-to-diamond transformation at a temperature of  1300 oC and pressure of 8 GPa. For comparison, etalon carbonado-type electrode with nearly limiting concentration of boron in diamond was synthesized by subjecting the mixture of amorphous boron with graphite to much higher temperatures (2200–2500 oC) under the same pressure. Despite the lower content of boron in diamond synthesized in the presence of metal borides, these new boron-doped carbonado electrodes are not inferior to the etalon compact in their electrochemical activity, as judging by the onset potential of anodic chlorine evolution from KCl solution. The presence of metal-containing structural defects in boron-doped diamond matrix is supposed to be responsible for the somewhat enhanced catalytic activity of the electrodes. High-pressure synthesis of bulk metal-modified boron-doped diamond opens a new avenue in the development of superior functional electrode materials. [ DOI ]

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