Kinetic Study of H2 Oxidation in the Preferential Oxidation of CO on a Nanosized Au/CeO2 Catalyst

被引：15

作者：

Xu, Jing ^{[1
]}

Li, Ping ^{[1
]}

Song, Xingfu ^{[1
]}

Qi, Zhiwen ^{[1
]}

Yu, Jianguo ^{[1
]}

Yuan, Weikang ^{[1
]}

Han, Yi-Fan ^{[1
]}

机构：

[1] E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2010年 / 49卷 / 09期

关键词：

LOW-TEMPERATURE OXIDATION; SUPPORTED GOLD CATALYSTS; CARBON-MONOXIDE OXIDATION; GAS SHIFT REACTION; ROOM-TEMPERATURE; H-2-RICH GAS; ADSORPTION; TIO2; SURFACES; OXYGEN;

D O I：

10.1021/ie100325y

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Kinetic study of H-2 oxidation in the preferential oxidation (PROX) of CO was implemented over a nanosize Au/CeO2 catalyst in a temperature range 313-353 K. The Langmuir-Hinshelwood mechanism was proposed to be mainly responsible for H-2 oxidation, and CO oxidation can be accelerated by coadsorbed H at low temperatures. On the other hand, the water in the system has proved to suppress both CO and H-2 oxidation by increasing the energy bars. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) of CO adsorption on the Au surface indicates that linear CO-Au bond can be weakened in the presence of H-2; meanwhile, water can be a poison taking effects via the bonding of water and the lattice oxygen at the interface of Au/CeO2. The irreversible loss of activity during reaction may be caused by the reconstruction of Au particles, at least in part.

引用

页码：4149 / 4155

页数：7

共 50 条

[31] A Density Functional Theory Study of CO Oxidation on CeO2(110) Surface [J].

Teng Botao ;

Jiang Shiyu ;

Guo Xiaowei ;

Yuan Jinhuan ;

Luo Mengfei .

ACTA CHIMICA SINICA, 2009, 67 (24) :2765-2772

[32] Preferential oxidation of CO in rich H2 over CuO/CeO2: Operando-DRIFTS analysis of deactivating effect of CO2 and H2O [J].

Gamarra, Daniel ;

Martinez-Arias, Arturo .

JOURNAL OF CATALYSIS, 2009, 263 (01) :189-195

[33] New Approach to Synthesis of CuO/CeO2 Catalysts for Preferential CO Oxidation [J].

Wang, Shuhua ;

Xu, Li ;

Shen, Pan ;

Chen, Chao ;

Zhang, Ning .

MECHANICAL SCIENCE AND ENGINEERING IV, 2014, 472 :666-670

[34] Copper as promoter of the NiO-CeO2 catalyst in the preferential CO oxidation [J].

Chagas, Carlos Alberto ;

de Souza, Eugenio F. ;

Manfro, Robinson L. ;

Landi, Sandra M. ;

Souza, Mariana M. V. M. ;

Schmal, Martin .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2016, 182 :257-265

[35] Effect of the oxidation state of gold on the complete oxidation of isobutane on Au/CeO2 catalysts [J].

Ying, Fang ;

Wang, Shuiju ;

Au, Chak-Tong ;

Lai, Suk-Yin .

GOLD BULLETIN, 2010, 43 (04) :241-251

[36] Activity of Au/Fe2O3-TiO2 catalyst for preferential CO oxidation [J].

Luengnaruemitchai, Apanee ;

Srihamat, Kunanya ;

Pojanavaraphan, Chinchanop ;

Wanchanthuek, Ratchaneekorn .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2015, 40 (39) :13443-13455

[37] Promoting effect of TiO2 on the catalytic performance of Pt-Au/TiO2(x)-CeO2 for the co-oxidation of CO and H2 at room temperature [J].

Hong, Xiaowei ;

Sun, Ye ;

Zhu, Tianle ;

Liu, Zhiming .

APPLIED SURFACE SCIENCE, 2017, 396 :226-234

[38] Preferential CO oxidation in H2-rich stream over Au/CeO2 catalysts prepared via modified deposition-precipitation [J].

Sakwarathorn, Theerathad ;

Luengnaruemitchai, Apanee ;

Pongstabodee, Sangobtip .

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2011, 17 (04) :747-754

[39] Multishell hollow CeO2/CuO microbox catalysts for preferential CO oxidation in H2-rich stream [J].

Gao, Meiyi ;

Zhao, Yuhong ;

Zeng, Shanghong ;

Su, Haiquan .

CATALYSIS COMMUNICATIONS, 2015, 72 :105-110

[40] Kinetics, mechanism, and the influence of H2 on the CO oxidation reaction on a Au/TiO2 catalyst [J].

Schumacher, B ;

Denkwitz, Y ;

Plzak, V ;

Kinne, M ;

Behm, RJ .

JOURNAL OF CATALYSIS, 2004, 224 (02) :449-462

← 1 2 3 4 5 →