Plasma generation electrode, plasma reactor, and exhaust gas cleaning apparatus

A plasma generation electrode comprising:

• a plurality of planar unit electrodes hierarchically layered in a vertical direction at a predetermined spacing, and spaces, which are disposed between the unit electrodes and in which at least one end in a horizontal direction gas passing direction is opened and both ends of the other direction are closed, the plasma generation electrode being capable of generating plasmas in the spaces by application of a voltage between the unit electrodes, wherein
• the plasma is generated in a gas between the unit electrodes,
• the unit electrode is composed of a tabular ceramic material serving as a dielectric material and an electrically conductive film disposed in the inside of the ceramic material;
• the plurality of unit electrodes are layered at a constant spacing;
• the distance between the electrically conductive films disposed in the unit electrodes adjacent to each other is varied partly or the dielectric constant of the ceramic material constituting the unit electrode is varied partly;
• and
• plasmas having different intensities can be generated partly in the spaces.