Methods of treating electrodes and gas sensors comprising...

Coating processes – With post-treatment of coating or coating material – Cooling

Reexamination Certificate

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C427S331000, C427S383100, C427S077000, C502S101000

Reexamination Certificate

active

10626128

ABSTRACT:
A method for forming an electrode comprises: combining a platinum precursor with a gold precursor to form an electrode ink; forming the electrode ink into an electrode precursor; firing the electrode precursor to form the electrode; treating the electrode in an environment having an oxygen partial pressure of less than or equal to 500 ppm oxygen for a period of time sufficient produce an electrode with an exposed surface gold concentration of greater than or equal to about 6 times a bulk gold concentration in the electrode.

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