The invention discloses a silver 
nanowire array 
electrode, a preparation method and application thereof.  The electrodes are 
silver nanowires forming an array with a 
diameter of 50-70nm and a wire length of 250-350nm. The bottom of the array is a 
silver film of 130-170nm and a 
copper film of 0.5-1mm; the method is to use a secondary 
anode on the aluminum sheet first  Oxidation method to obtain a through-hole 
alumina template with a 
pore diameter of 50-70nm, and then use the 
ion sputtering method to vapor-deposit a 
silver film on one side of the 
alumina template, and then place the 
alumina template with a 
silver film on one side in a silver 
electrolysis  solution, use the electrodeposition method to electrodeposit at a 
constant voltage of 0.08 to 0.12V for 1 to 5 minutes, then place it in the 
copper electrolyte, use the electrodeposition method to electrodeposit 2.5 to 3.5 at a current of 8 to 12mA / cm2  h, after that, put the aluminum 
oxide template with 
silver nanowires in the hole, one side covered with silver film and 
copper film in sequence, in acid solution or strong alkali solution to corrode the aluminum 
oxide template, and make silver 
nanowire array 
electrode.  Array electrodes can be used as sensitive elements for trace detection or reduction of halogenated organic compounds.