Catalysts employing the particles as a support and having catalytic agents distributed at {HEAD ~ controlled depths} in {TAIL ~ the particle} have excellent initial and sustained activity and durability, especially for eliminating pollutants in automotive exhaust streams 
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Catalysts employing the particles as a support and having catalytic agents distributed at { HEAD ~ controlled depths } in { TAIL ~ the particle } have excellent initial and sustained activity and durability , especially for eliminating pollutants in automotive exhaust streams
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH