Citation: Tan Bingqing, Ye Yinghao, Huang Zeai, Ye Liqun, Ma Minzhi, Zhou Ying. Promotion of photocatalytic steam reforming of methane over Ag⁰/Ag⁺-SrTiO₃[J]. Chinese Chemical Letters, ;2020, 31(6): 1530-1534. doi: 10.1016/j.cclet.2019.11.007 shu

Promotion of photocatalytic steam reforming of methane over Ag⁰/Ag⁺-SrTiO₃

Tan Bingqing ^a,b ,
Ye Yinghao ^a,b ,
Huang Zeai ^a,b ,
Ye Liqun ^c ,
Ma Minzhi ^a,b ,
Zhou Ying ^a,b,*,

a.
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
b.
The Center of New Energy Materials and Technology, School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China
c.
Engineering Technology Research Center of Henan Province for Solar Catalysis, Collaborative Innovation Center of Water Security for Water Source Region of Mid-Line of South-to-North Diversion Project of Henan Province, Nanyang Normal University, Nanyang 473061, China

yzhou@swpu.edu.cn

Received Date: 30 September 2019
Revised Date: 29 October 2019
Accepted Date: 6 November 2019
Available Online: 12 November 2019

Figures(4)

Methane (CH₄) is not only used as a fuel but also as a promising clean energy source for hydrogen generation. The steam reforming of CH₄ (SRM) using photocatalysts can realize the production of syngas (CO + H₂) with low energy consumption. In this work, Ag⁰/Ag⁺-loaded SrTiO₃ nanocomposites were successfully prepared through a photodeposition method. When the loading amount of Ag is 0.5 mol%, the atom ratio of Ag⁺ to Ag⁰ was found to be 51:49. In this case, a synergistic effect of Ag⁰ and Ag⁺ was observed, in which Ag⁰ was proposed to improve the adsorption of H₂O to produce hydroxyl radicals and enhance the utilization of light energy as well as the separation of charge carriers. Meanwhile, Ag⁰ was regarded as the reduction reaction site with the function of an electron trapping agent. In addition, Ag⁺ adsorbed the CH₄ molecules and acted as the oxidation reaction sites in the process of photocatalytic SRM to further promote electron-hole separation. As a result, 0.5 mol% Ag-SrTiO₃ exhibited enhancement of photocatalytic activity for SRM with the highest CO production rate of 4.3 μmol g^-1 h^-1, which is ca. 5 times higher than that of pure SrTiO₃. This work provides a facile route to fabricate nanocomposite with cocatalyst featuring different functions in promoting photocatalytic activity for SRM.
- Photocatalysis,
- Steam reforming of CH₄,
- Hydrogen,
- Carbon monoxide,
- Cocatalyst,
- Ag⁰/Ag⁺-SrTiO₃
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Promotion of photocatalytic steam reforming of methane over Ag0/Ag+-SrTiO3

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通讯作者: 陈斌, bchen63@163.com

Promotion of photocatalytic steam reforming of methane over Ag⁰/Ag⁺-SrTiO₃