Enhancement of ammonia synthesis activity on La2O3-supported Ru catalyst by addition of ceria - Details

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Abstract：

The　addition　of　Ce　species　in　La2O3　can　enhance　the　number　of　defect　sites　and　generate　the　Ce1-xLaxO2-δ　solid　solution,　thereby　increasing　the　amount　of　the　exposed　ruthenium　species　and　proportion　of　metallic　ruthenium　species.　The　presence　of　Ce　species　in　Ru/La2O3　promotes　the　desorption　of　hydrogen,　and　hydrogen　species　prefers　to　desorb　in　the　H2　molecule　formation　pathway.　On　the　other　hand,　the　difference　in　the　Ce　addition　method　strongly　affects　the　exchange　between　the　adsorbed　hydrogen　species　on　Ru　catalyst　with　the　gaseous　hydrogen　species.　Owing　to　improvement　of　the　proportion　of　oxygen　vacancy,　Ru0　and　number　of　the　exposure　of　ruthenium　species,　H2　species　adsorbed　on　Ru/LaCe–C　prepared　by　coprecipitation　method　preferentially　desorbs　in　the　formation　of　H2　pathway,　and　a　large　proportion　of　the　adsorbed　H　species　would　exchange　with　the　hydrogen　species　from　the　gaseous　phase,　which　leads　to　improvement　of　ammonia　synthesis　rate　by　75%　in　comparison　with　Ru/La2O3　catalyst.　©　2022　Hydrogen　Energy　Publications　LLC

Keyword：

Ammonia synthesis; Ce1-xLaxO2-δ solid solution; Coprecipitation method; Doping; Hydrogen adsorption property; Ru catalyst

Community：

[ 1 ] [Li, C.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350002, China
[ 2 ] [Zheng, Y.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350002, China
[ 3 ] [Li, M.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350002, China
[ 4 ] [Fang, B.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350002, China
[ 5 ] [Lin, J.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350002, China
[ 6 ] [Ni, J.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350002, China
[ 7 ] [Wang, X.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350002, China
[ 8 ] [Lin, B.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350002, China
[ 9 ] [Jiang, L.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350002, China

Reprint 's Address：

[Lin, B.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fujian, China; ; National Engineering Research Center of Chemical Fertilizer Catalyst, Fujian, China; 电子邮件: lin3jx@fzu.edu.cn Jiang, L.; National Engineering Research Center of Chemical Fertilizer Catalyst, Fujian, China; 电子邮件: jll@fzu.edu.cn

Email：

bylin@fzu.edu.cn Lin, J.

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Source ：

International Journal of Hydrogen Energy

ISSN： 0360-3199

Year： 2022

Issue： 55

Volume： 47

Page： 23240-23248

7 . 2

JCR@2022

8 . 1 0 0

JCR@2023

ESI HC Threshold：66

JCR Journal Grade：1

CAS Journal Grade：2

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SCOPUS Cited Count：

ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 0

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