Addition of Ce in Cu/Three‐Dimensional Graphene Derived from Watermelon for Low Temperature NH₃‐SCR

Abstract

In this paper, 3-Dimensional Graphene (3DG) prepared by watermelon was used as the supporter to synthesize Cu/3DG, Ce/3DG and CuÀ Ce/3DG catalysts by the hydrothermal method, after which they were also investigated in NH 3 -SCR. Synergistic mechanism between Ce and Cu was further explored. Experimental results indicated that the three catalysts all exhibited excellent low-temperature nitrogen oxide reduction activity which reached 99 % and remained unchanged in the range of 250-400°C. 2Cu-3Ce/3DG displayed optimal NO x conversion rate, namely, its activity reached 92.9 % at 200°C that mainly attributed to the increase of the Cu + , Ce 3 + and the form of the abundant acid sites. Moreover, the sulfur and water resistance of 2Cu-3Ce/3DG were tested. At 250°C, the conversion rate of NO x was increased to 99.1 %, which showed excellent sulfur resistance.