Modulating the methanation activity of Ni by the crystal phase of TiO2

Lin Yaping; Zhu Yifeng; Pan XiulianBao Xinhe

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Modulating the methanation activity of Ni by the crystal phase of TiO2

机译：调制Ni的甲烷化活动二氧化钛的晶体阶段

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We demonstrate that the methanation activity of Ni catalysts is modulated by the crystal phase of the TiO2 support. The rutile TiO2 (r-TiO2)-supported Ni catalyst gives a turnover frequency almost two orders of magnitude higher than the anatase TiO2 (a-TiO2)-supported catalyst although the two catalysts exhibit a similar mean Ni particle size. Characterization by H-2-TPR, H-2-TPD, XPS and IR reveals a stronger interaction between Ni and r-TiO2, leading to a higher capability of CO activation and hydrogenation activity of Ni although Ni is partially covered by TiOx overlayers during reaction. Interestingly, the modulating effects of the titania crystal phases are much more pronounced on the activity of Ni in CO2 methanation.

机译：我们证明Ni的甲烷化活动催化剂是由晶体调制的阶段二氧化钛支持。(r-TiO2)支持Ni催化剂提供了营业额频率几乎高出两个数量级比锐钛矿二氧化钛(a-TiO2)支持的催化剂尽管这两个催化剂表现出类似的意思镍粒子的大小。H-2-TPD、XPS、IR揭示了一个更强倪和r-TiO2之间的互动,导致更高的激活和能力加氢活性镍虽然倪部分由TiOx覆盖物中的反应。更的二氧化钛晶体阶段明显在二氧化碳Ni的活动甲烷化。

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来源
《Catalysis science & technology》 |2017年第13期|2813-2818|共6页
作者
Lin Yaping; Zhu Yifeng; Pan XiulianBao Xinhe;
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作者单位

Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China;

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原文格式 PDF
正文语种英语
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关键词
methanation; crystalline phase; CatalystsNickelturnover frequencyactivity;

机译：甲烷化;水晶阶段;CatalystsNickelturnover frequencyactivity;

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Modulating the methanation activity of Ni by the crystal phase of TiO2

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