Structure and activity relationships of AMn2O4 (A = Mg and Zn) spinels in selective catalytic reduction of NOx with NH3 - Details

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Abstract：

Mn-based　spinel　as　a　catalyst　for　low-temperature　selective　catalytic　reduction　with　ammonia　(NH3-SCR)　has　been　widely　studied.　However,　most　researchers　have　focused　on　double　transition　metal　Mn-based　spinel　and　the　reports　about　doping　with　non-transition　metal　are　not　common.　Herein,　Mg2+　and　Zn2+　with　similar　ionic　radii　were　used　to　prepare　high　purity　MgMn2O4　and　ZnMn2O4　(named　MMO　and　ZMO)　to　study　their　structure　and　activity　relationships　in　NH3-SCR.　It　was　found　that　the　denitration　performance　of　the　two　showed　significant　differences　at　low　temperature　despite　have　a　very　similar　crystal　structure.　A　series　of　characterization　methods　and　first-principles　calculations　demonstrates　that　the　relatively　weak　bonding　strength　and　basic　adsorption　sites　of　MMO　catalyst　are　the　key　factors　contributing　to　its　superior　reactivity　at　low　temperatures.　This　work　provides　novel　insights　and　ideas　in　comprehending　the　catalytic　function　of　non-transition　metal-doped　Mn-based　spinels　in　NH3-SCR　reactions.　©　2024　Elsevier　B.V.

Keyword：

Catalysts MgMn2O4 ZnMn2O4 Structure–activity relationship NH3-SCR

Author Community：

[ 1 ] [Hou S.]State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China
[ 2 ] [Hou S.]School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
[ 3 ] [Fang D.]State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China
[ 4 ] [Fang D.]Center for Materials Research and Analysis, Wuhan University of Technology, Wuhan, 430070, China
[ 5 ] [Li Q.]State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China
[ 6 ] [Li Q.]School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
[ 7 ] [Jin Q.]State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China
[ 8 ] [Jin Q.]School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
[ 9 ] [Sheng F.]State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China
[ 10 ] [Sheng F.]School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
[ 11 ] [He F.]Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
[ 12 ] [Xie J.]Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China

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Source ：

Separation and Purification Technology

ISSN： 1383-5866

Year： 2024

Volume： 345

8 . 6 0 0

JCR@2022

Cited Count：

WoS CC Cited Count： 0

SCOPUS Cited Count： 5

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 4

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