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研究水平有限,发两篇文章那是一把辛酸泪,第一篇开始是快报,后被编辑要求改为全文又转了好些日子。两篇的题目最后多有小变动,第一篇主动修改,第二篇题目被动修改。发篇文章真不容易,唉,当然,现在看来都还有值得改进的地方,但是做出来的东西终究还是要发出去,而后面的研究依然必须坚持才能逐步完善。
KOH activation of the thermally modified carbon as support of Ru catalyst for ammonia synthesis
ACS Catalysis Reject
Catalysis Communications Reject
Catalysis Science & Technology Reject and resubmit
Catalysis Science & Technology Reject
ACS Catalysis Reject
Applied Catalysis A Reject
Carbon Reject
ChemCatChem accepted
(Now title: KOH activation of the thermally modified carbon as a support of Ru catalyst for ammonia synthesis, http://onlinelibrary.wiley.com/doi/10.1002/cctc.201200889/abstract)
Abstract: Carbon supports with a low ratio of micropore volume to total pore volume can be prepared by KOH activation of thermally modified carbon. KOH treatment of carbons in nitrogen led to the creation of basic sites as well as acidic surface groups,whereas KOH treatment in air resulted in more acidic groups. Steam treatment quickly increased the surface area and pore volume, but did not create surface reactive groups. The increase in surface areas, micropores, and surface functional groups of carbon supports led to a decrease of the particle sizes, which not only improved the ability of hydrogen to migrate from Ru metal to the remote promoter precursors, but also increased the amount of adsorbed hydrogen and nitrogen. The properties of carbon combined with the size of the Ru particles affected the ammonia-synthesis activity.
New Insights into the promoter effect of potassium for ammonia synthesis from temperature programmed desorption
Journal of Catalysis Reject
ACS Catalysis Reject
Applied Catalysis A Reject
Catalysis Science & Technology accepted
(Now title: Study of potassium promoter effect for Ru/AC catalysts for ammonia synthesis,
http://pubs.rsc.org/en/content/articlelanding/2013/cy/c3cy20830c)
Abstract: Ru/AC catalysts with K promoter were prepared by impregnation of the samples with different amounts of KOH. The catalysts were characterized using a variety of techniques, including X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, CO chemisorption and temperature-programmed desorption. The presence of K promoter had a limited effect on the size of Ru particles, but significantly enhanced the amount of adsorbed hydrogen, nitrogen and ammonia. A new desorption peak of nitrogen and ammonia at low temperature can be observed in their TPD profiles for Ru catalysts with K promoter. We propose that the presence of K promoter not only improved the adsorption properties of hydrogen, nitrogen and ammonia for Ru catalyst supported on activated carbon, but also weakened the adsorption strength of nitrogen and ammonia. The change in the chemisorptive properties of reactant gases including hydrogen, nitrogen and ammonia may be responsible for K promoter enhanced ammonia synthesis activity of Ru/AC catalyst, more than just the electronic properties of K promoter.
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