锐钛矿型TiO<sub>2</sub>担载的Pd催化剂用于乙炔选择加氢的催化性能及其表征

引用本文: 高晓平, 郭章龙, 周亚男, 敬方梨, 储伟. 锐钛矿型TiO₂担载的Pd催化剂用于乙炔选择加氢的催化性能及其表征[J]. 物理化学学报, 2017, 33(3): 602-610. doi: 10.3866/PKU.WHXB201611251 shu

Citation: GAO Xiao-Ping, GUO Zhang-Long, ZHOU Ya-Nan, JING Fang-Li, CHU Wei. Catalytic Performance and Characterization of Anatase TiO₂ Supported Pd Catalysts for the Selective Hydrogenation of Acetylene[J]. Acta Physico-Chimica Sinica, 2017, 33(3): 602-610. doi: 10.3866/PKU.WHXB201611251 shu

锐钛矿型TiO₂担载的Pd催化剂用于乙炔选择加氢的催化性能及其表征

1.
四川大学化学工程学院, 成都 610065;
2.
四川大学新能源与低碳技术研究院, 成都 610207
基金项目:
国家自然科学基金（21476145）资助项目

摘要: 采用水热法合成了含有89%{101}晶面的TiO₂纳米锭（TiO₂-101）和77%{001}晶面的TiO₂纳米片（TiO₂-001），将其用作载体来制备担载钯催化剂；研究了上述制备的TiO₂纳米材料对Pd/TiO₂-101和Pd/TiO₂-001催化剂用于乙炔选择加氢制聚合级乙烯催化性能的影响。结果表明，Pd/TiO₂-101催化剂表现出更好的乙炔转化率和乙烯收率。通过氢气程序升温脱附（H₂-TPD）、氢气程序升温还原（H₂-TPR）、透射电子显微镜（TEM）、CO化学吸附、X射线光电子能谱（XPS）和热重分析仪（TGA）等对催化剂进行了结构表征和分析。TEM和CO化学吸附结果表明，Pd纳米颗粒（NPs）在TiO₂-101载体上有较小的颗粒尺寸（1.53 nm）和较高的分散度（15.95%）；而Pd纳米颗粒在TiO₂-001载体上的颗粒尺寸是4.36 nm和9.06%的分散度。Pd/TiO₂-101催化剂上较小的Pd颗粒尺寸及其较高的分散度使催化剂具有更多的反应活性位点，这促进了其反应的催化活性。

关键词:

English

Catalytic Performance and Characterization of Anatase TiO₂ Supported Pd Catalysts for the Selective Hydrogenation of Acetylene

1.
School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China;
2.
Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, P. R. China
Received Date: 26 August 2016
Revised Date: 25 November 2016
Fund Project:
The project was supported by the National Natural Science Foundation of China (21476145)

Abstract: Anatase TiO₂ nanospindles containing 89% exposed {101} facets (TiO₂-101) and nanosheets with 77% exposed {001} facets (TiO₂-001) were hydrothermally synthesized and used as supports for Pd catalysts. The effects of the TiO₂ materials on the catalytic performance of Pd/TiO₂-101 and Pd/TiO₂-001 catalysts were investigated in the selective hydrogenation of acetylene to polymer-grade ethylene. The Pd/TiO₂-101 catalyst exhibited enhanced performance in terms of acetylene conversion and ethylene yield. To understand these effects, the catalysts were characterized by H₂ temperature-programmed desorption (H₂-TPD), H₂ temperatureprogrammed reduction (H₂-TPR), transmission electron microscopy (TEM), pulse CO chemisorption, X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The TEM and CO chemisorption results confirmed that Pd nanoparticles (NPs) on the TiO₂-101 support had a smaller average particle size (1.53 nm) and a higher dispersion (15.95%) than those on the TiO₂-001 support (average particle size of 4.36 nm and dispersion of 9.06%). The smaller particle size and higher dispersion of Pd on the Pd/TiO₂-101 catalyst provided more reaction active sites, which contributed to the improved catalytic activity of this supported catalyst.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

锐钛矿型TiO₂担载的Pd催化剂用于乙炔选择加氢的催化性能及其表征

English

Catalytic Performance and Characterization of Anatase TiO₂ Supported Pd Catalysts for the Selective Hydrogenation of Acetylene

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

锐钛矿型TiO2担载的Pd催化剂用于乙炔选择加氢的催化性能及其表征

English

Catalytic Performance and Characterization of Anatase TiO2 Supported Pd Catalysts for the Selective Hydrogenation of Acetylene

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

锐钛矿型TiO₂担载的Pd催化剂用于乙炔选择加氢的催化性能及其表征

Catalytic Performance and Characterization of Anatase TiO₂ Supported Pd Catalysts for the Selective Hydrogenation of Acetylene

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs