科研成果
硕士生陈岷轩的论文在 APPLIED CATALYSIS A-GENERAL刊出
发布时间:2018-04-17 09:58:33     发布者:yz     浏览次数:

标题:Ammonia synthesis over Cs- or Ba-promoted ruthenium catalyst supported on strontium niobate

作者: Chen, MX (Chen, Minxuan); Yuan, MW (Yuan, Mingwei); Li, JJ (Li, Jinjun); You, ZX (You, Zhixiong)

来源出版物: APPLIED CATALYSIS A-GENERAL 卷:554 页码:  1-9   DOI10.1016/j.apcata.2018.01.006      出版年:  MAR 25 2018

摘要:Strontium niobates with different crystalline structure and morphology have been prepared via a hydrothermal method and applied as a support for ruthenium catalyst in ammonia synthesis. The sample synthesized with a nominal Sr/Nb = 2.0, having a pure Sr2Nb2O7 crystalline phase and specific surface area of 87 m(2) g(-1), exhibits the best performance as support for Ru catalyst. The flake-structured Sr2Nb2O7 substrate induced epitaxial growth of truncated pyramid shaped ruthenium nanoparticles with a dispersion as high as 93%, which have abundant steps and B-5 sites playing a key role in ammonia synthesis catalysis. Adding Cs- or Ba-promoter enhanced the activity of Ru/Sr2Nb2O7 catalyst drastically. The highest ammonia synthesis rate over 8Cs- or 4Ba-2 wt%Ru/Sr2Nb2O7 was 4986 and 2317 (mu mol g(cat)(-1) h(-1)) at 0.1 MPa and 673 K, respectively. In addition, both catalysts were stable over reaction for 72 h at 673 K and 0.1 MPa. Thus, the synthesized Sr2Nb2O7 is expected to be a practically promising oxide support for ruthenium ammonia synthesis catalsyts.

入藏号:

文献类型:Article

语种:English

作者关键词:Ammonia synthesis; Ruthenium catalysts; Strontium niobate; Cs-promotion; Ba-promotion

扩展关键词: ISOTOPIC TRANSIENT ANALYSIS; RU NANOPARTICLES; ZEOLITE-X; BARIUM; KINETICS; CARBON; ACTIVATION; ELECTRIDE; EFFICIENT; SRNB2O6

通讯作者地址:You, ZX (reprint author), Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Hubei, Peoples R China.
You, ZX (reprint author), Int Cooperat Base Sustainable Utilizat Resources, Wuhan 430072, Hubei, Peoples R China.

电子邮件地址:zyou@whu.edu.cn

地址:

 [Chen, Minxuan; Yuan, Mingwei; Li, Jinjun; You, Zhixiong] Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Hubei, Peoples R China. 
[Chen, Minxuan; Yuan, Mingwei; You, Zhixiong] Int Cooperat Base Sustainable Utilizat Resources, Wuhan 430072, Hubei, Peoples R China.

影响因子:4.339


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