ELECTRICALLY CONDUCTIVE DIAMOND ELECTRODE, AND SULFURIC ACID ELECTROLYSIS METHOD AND SULFURIC ACID ELECTROLYSIS APPARATUS EACH UTILIZING SAME

WIPO Patent Application WO/2012/086352

A1

The present invention is an electrically conductive diamond electrode which comprises an electrically conductive base and an electrically conductive diamond layer coated on the surface of the electrically conductive base, and which is characterized in that 1) the electrically conductive diamond layer has a thickness of 1-25 μm, 2) a potential window fulfills formula (1), and 3) the ratio (A/B) of a diamond component (A) to a non-diamond component (B) as determined by Raman spectroscopy fulfills formula (2): (1) 2.1 V ≤ potential window ≤ 3.5 V; (2) 1.5 < A/B ≤ 6.5 (A = the intensity at a wave number of 1300 cm-1 in Raman spectroscopy; B = the intensity at a wave number of 1500 cm-1 in Raman spectroscopy). The present invention provides: an electrically conductive diamond electrode in which the thickness of an electrically conductive diamond layer and the crystallinity of electrically conductive diamond are regulated so as to achieve high electrode durability and high oxidizable substance production efficiency at a low cell voltage; and a sulfuric acid electrolysis method and a sulfuric acid electrolysis apparatus, each of which utilizes the electrode.

KATO MASAAKI (JP)
DOMON HIROKI (JP)
KOSAKA JUNKO (JP)

PCT/JP2011/076781

June 28, 2012

November 21, 2011

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CHLORINE ENG CORP LTD (JP)
KATO MASAAKI (JP)
DOMON HIROKI (JP)
KOSAKA JUNKO (JP)

C01B31/06; C25B9/19

JP2002004073A	2002-01-09
JP2006152338A	2006-06-15
JP2010034521A	2010-02-12
JP2010031362A	2010-02-12

See also references of EP 2657370A4

KONDO Rieko et al. (JP)
Kondo Toshihide child (JP)

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