Hello,
the article you refers to an integrated gas sensor solution developed by researchers at MIT.
This is a gas sensor plus the NFC readout capability.
NXP does not have gas sensors.
However, if you use a 3rd party sensor, you could consider using our Ntag I2C to use it for energy harvesting, powering up a small node system (probably with a small microcontroller too) and communicate i.e. read-out the values from the gas sensor.
Hope this helps,
Toni
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