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Solid electrolyte exhaust gas sensor with increased NO/sub x/ sensitivity

Patent ·
OSTI ID:5812268
A solid electrolyte exhaust gas oxygen responsive sensor having a platinum exhaust gas electrode and a porous ceramic coating on the electrode is disclosed. The porous ceramic coating contains rhodium for making the sensor also responsive to NO/sub x/. In a specific example, rhodium permeates a gamma alumina porous overcoat on a sputtered platinum film serving as an exhaust gas electrode on a zirconia solid electrolyte member.
Assignee:
General Motors Corp
Patent Number(s):
US 4199425
OSTI ID:
5812268
Country of Publication:
United States
Language:
English

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Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
330701* -- Emission Control-- Nitrogen Oxides
AIR POLLUTION CONTROL
AIR POLLUTION MONITORS
CHALCOGENIDES
COATINGS
CONTROL
ELECTRODES
ELECTROLYTES
ELEMENTS
ENGINES
EQUILIBRIUM
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
METALS
METERS
MONITORING
MONITORS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
OXYGEN METERS
PLATINUM
PLATINUM METALS
POLLUTION CONTROL
REFRACTORY METALS
RHODIUM
SOLID ELECTROLYTES
TRANSITION ELEMENTS
WASTES
ZIRCONIUM