Abstract
CuCHA and CuLTA were synthesized and examined for phosphorus poisoning, followed by hydrothermal aging. The CuLTA showed excellent hydrothermal stability, however, the CuCHA suffered dramatic structural damage after aging at 900 °C. The devastation of the aged CuCHA led to the disappearance of Cu active sites upon aging, especially ZCuOH sites. CuLTA retained most of the Cu active sites after aging. Phosphorus poisoning was found to reduce the hydrothermal stability of CuCHA, whereas CuLTA was not affected. Importantly, the treatment of hydrothermal aging was proved to regenerate phosphorus poisoned ZCuOH sites in CuLTA.
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