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Addition of Ce in Cu/Three‐Dimensional Graphene Derived from Watermelon for Low Temperature NH 3 ‐SCR
Author(s) -
Kang Yan,
Li Zhifang,
Cui Jinxing,
Geng Cui,
Zhang Chao,
Li Peng,
Yang Changlong
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201904519
Subject(s) - sulfur , catalysis , atmospheric temperature range , hydrothermal circulation , oxide , nitrogen , graphene , selective catalytic reduction , chemistry , inorganic chemistry , materials science , nuclear chemistry , chemical engineering , metallurgy , nanotechnology , organic chemistry , physics , meteorology , engineering
In this paper, 3 ‐Dimensional Graphene ( 3DG ) prepared by watermelon was used as the supporter to synthesize Cu/3DG, Ce/3DG and Cu−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.
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