The effect of Ag as a promoter for Ru/CeO2 catalysts in ammonia synthesis - Details

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Abstract：

A　series　of　Ag-Ru/CeO2　catalysts　were　prepared　by　conventional　impregnation　methods　and　characterized　by　XRD,　BET,　XPS,　H2-TPR,　H2-TPD-MS,　and　N2-TPD.　The　activity　test　shows　that　ammonia　concentration　of　the　catalyst　with　6%　Ag　is　9.4%　at　10　MPa,　10,000　h-1,　400°C,　which　is　22%　higher　than　that　of　Ru/CeO2.　Such　high　catalytic　activity　was　ascribed　to　three　effects:　electron　donating　property　of　partially　reduced　CeO2-x　to　Ru　metal,　the　low　workfunction　of　Ru　atoms　and　the　less　competitive　adsorbed　between　hydrogen　and　nitrogen　on　Ru　atoms　derived　from　the　synergetic　effect　between　Ag　and　Ru.　©　2012　Elsevier　B.V.

Keyword：

Ammonia synthesis; CeO2; Ruthenium catalyst; Silver; SMSI

Community：

[ 1 ] [Lin, J.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, Fujian, China
[ 2 ] [Zhang, L.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, Fujian, China
[ 3 ] [Wang, Z.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, Fujian, China
[ 4 ] [Ni, J.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, Fujian, China
[ 5 ] [Wang, R.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, Fujian, China
[ 6 ] [Wei, K.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, Fujian, China

Reprint 's Address：

[Lin, J.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, Fujian, China

Email：

lin3jx@fzu.edu.cn

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Source ：

Journal of Molecular Catalysis A: Chemical

ISSN： 1381-1169

Year： 2013

Volume： 366

Page： 375-379

3 . 6 7 9

JCR@2013

5 . 0 0 8

JCR@2018

JCR Journal Grade：2

CAS Journal Grade：3

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WoS CC Cited Count：

SCOPUS Cited Count： 28

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 1

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