Enhanced activity, durability and anti-poisoning property of Pt/W18O49 for methanol oxidation with a sub-stoichiometric tungsten oxide W18O49 support

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	Enhanced activity, durability and anti-poisoning property of Pt/W18O49 for methanol oxidation with a sub-stoichiometric tungsten oxide W18O49 support
	Li, F ; Gong, HY ; Wang, Y ; Zhang, H ; Wang, YZ ; Liu, SN ; Wang, S ; Sun, CW
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2014
卷号	2 期号:47 页码:20154
ISSN号	2050-7488
通讯作者	Li, F (reprint author), Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China.
中文摘要	In this work, sub-stoichiometric tungsten oxide W18O49 was first studied as a support for a Pt catalyst. Metallic monoclinic W18O49 nanorods (NRs) with an isotropic morphology can not only improve electron, reactant, and product transport but can also enhance the utilisation of Pt for the methanol oxidation reaction (MOR). The specific activity for the forward peak (If) of Pt/W18O49 was determined to be 1.14 mA cm(Pt)(-2), which is approximately 1.4 and 1.8 times higher than that of Pt-black and Pt/C, respectively. On the other hand, the robust W18O49 NRs improve the stability of Pt/W18O49. After a 5000-cycle accelerated durability test, the electrochemical surface area (ECSA) loss rate of Pt/W18O49 was only 27.12%, less than that of Pt-black and Pt/C. Moreover, numerous oxygen vacancies and two valence states of W (W5+ and W6+) were found to co-exist in W18O49, which may promote hydrogen spillover and oxygen buffering. These effects together contributed to improve the anti-poisoning properties of Pt/W18O49 towards the intermediates in the MOR. The peak current ratio of the forward versus the backward (I-f/I-b) reaction is 1.12 for Pt/W18O49, 0.99 for Pt-black, and 0.79 for Pt/C. It was found that the Magneli phase W18O49 may be a promising catalyst support for use in the MOR.
资助信息	National Natural Science Foundation of China [51172007, 51372271, 51472009, 51474014]; Beijing Municipal Natural Science Foundation [2120001]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59211]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Li, F,Gong, HY,Wang, Y,et al. Enhanced activity, durability and anti-poisoning property of Pt/W18O49 for methanol oxidation with a sub-stoichiometric tungsten oxide W18O49 support[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(47):20154.
APA	Li, F.,Gong, HY.,Wang, Y.,Zhang, H.,Wang, YZ.,...&Sun, CW.(2014).Enhanced activity, durability and anti-poisoning property of Pt/W18O49 for methanol oxidation with a sub-stoichiometric tungsten oxide W18O49 support.JOURNAL OF MATERIALS CHEMISTRY A,2(47),20154.
MLA	Li, F,et al."Enhanced activity, durability and anti-poisoning property of Pt/W18O49 for methanol oxidation with a sub-stoichiometric tungsten oxide W18O49 support".JOURNAL OF MATERIALS CHEMISTRY A 2.47(2014):20154.