Using glucose,urea,ruthenium chloride and silica sol as the precursors and carbonized glucose as the carbon template,ruthenium nanoparticles confined within mesoporous silica (Ru-SiO2) with highly dispersion was prepared by microwave-assisted method.The structure and morphology of the materials were characterized by XRD,TEM and BET analysis.The evaluation of catalytic activity of the sample was carried out by thermocatalytic ammonia decomposition reaction.The results showed that the materials prepared by in-situ method exhibited an excellent catalytic activity and higher conversion rate at the same temperature.Combined with the results,this was mainly attributed to the limited action of silica carrier on the active component Ru,which made Ru particles own small and uniform particle size and thermal stability.
Nie Tianming, Song Wenjing, Zhao Jiawen, Deng Lidan, Jiang Xingmao
. Preparation and NH3 decomposition of Ru nanoparticle confined within SiO2[J]. New Chemical Materials, 2020
, 48(8)
: 203
-207
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.08.045
[1] Klerke A,Christensen C H,Nørskov J K,et al.Ammonia for hydrogen storage:challenges and opportunities[J].J Mater Chem,2008,18(20):2304-2310.
[2] Lamb K E,Dolan M D,Kennedy D F.Ammonia for hydrogen storage:a review of catalytic ammonia decomposition and hydrogen separation and purification[J].Int J Hydrogen Energ,2019,44(7):3580-3593.
[3] Li L,Wang Y H,Xu Z P,et al.Catalytic ammonia decomposition for CO-free hydrogen generation over Ru/Cr2O3 catalysts[J].Appl Catal A:Gen,2013,467:246-252.
[4] Ju X H,Liu L,Yu P,et al.Mesoporous Ru/MgO prepared by a deposition-precipitation method as highly active catalyst for producing COx-free hydrogen from ammonia decomposition[J].Appl Catal B:Environ,2017,211:167-175.
[5] Ji J,Yan X D,Qian G,et al.Morphology and location manipulation of Fe nanoparticles on carbon nanofibers as catalysts for ammonia decomposition to generate hydrogen[J].Int J Hydrogen Energ,2017,42(27):17466-17475.
[6] Hu Z P,Weng C C,Chen C C,et al.Two-dimensional mica nanosheets supported Fe nanoparticles for NH3 decomposition to hydrogen[J].Mol Catal,2018,448:162-170.
[7] Inokawa H,Ichikawa,Miyaoka H.Catalysis of nickel nanoparticles with high thermal stability for ammonia decomposition[J].Appl Catal A:Gen,2015,491:184-188.
[8] Hu Z P,Weng C C,Chen C,et al.Catalytic decomposition of ammonia to COx-free hydrogen over Ni/ZSM-5 catalysts:a comparative study of the preparation methods[J].Appl Catal A:Gen,2018,562:49-57.
[9] Li L,Jiang R Y,Chu W,et al.Cobalt nanoparticles embedded in porous carbon matrix as an efficient catalyst for ammonia decomposition[J].Catal Sci Technol,2017,7:1363-1371.
[10] Kizilkaya A C,Niemantsverdriet J W,Weststrate C J.Effect of ammonia on cobalt Fischer-Tropsch synthesis catalysts:a surface science approach[J].Catal Sci Techno,2019,9(3):702-710.
[11] Lendzion-Bieluń Z,Arabczyk W.Fused FeCo catalysts for hydrogen production by means of the ammonia decomposition reaction[J].Catal Today,2013,212:215-219.
[12] Silva H,Nielsen M G,Fiordaliso E M,et al.Synthesis and characterization of Fe-Ni/γ-Al2O3 egg-shell catalyst for H2 generation by ammonia decomposition[J].Appl Catal A:Gen,2015,505:548-556.
[13] Li L,Chen F,Dai Y,et al.Fe-assisted Ru clusters supported on porous and graphitic carbon for ammonia decomposition to COx free hydrogen[J].RSC Adv,2016,6(104):102336-102342.
[14] Zhou S L,Lin S,Guo H.First-principles insights into ammonia decomposition catalyzed by Ru clusters anchored on carbon nanotubes:size dependence and interfacial effects[J].J Phy Chem C,2018,122(16):9091-9100.