Selective catalytic reduction description

Titanium and tin are important in terms of photocatalytic and sensor appHcations. There is insufficient space to continue this description here, but the Hterature on these topics can be found elsewhere [222-232]. Tungstated zirconia, for example, is a promising candidate for an ammonia exhaust gas sensor required to control a Urea-SCR (Selective Catalytic Reduction) system in diesel-engined cars [233, 234]. 

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