Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H-2-Oxidation of CO with OH via HCOO Intermediate

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	Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H-2-Oxidation of CO with OH via HCOO Intermediate
	Tanaka, Ken-ichi; Shou, Masashi; He, Hong; Shi, Xiaoyan; Zhang, Xiuli
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2009-07-16
卷号	113 期号:28 页码:12427-12433
中文摘要	The preferential oxidation (PROX) reaction of CO (CO + H-2 + 1/2O(2) -> CO2) on a FeOx/Pt/TiO2 catalyst (similar to 140 wt % FeOx on 1 wt % Pt/TiO2) was studied at 60 degrees C by using in situ DRIFT spectroscopy. The PROX reaction of CO occurs via a HCOO intermediate and its oxidation with OH instead of oxygen, which is different from ordinary oxidation of CO with O-2 (CO + 1/2O(2) -> CO2). The mechanism is as follows: (i) CO(a) + OH- -> HCOO + e, (ii) O + e + H+ -> OH, and (iii) HCOO + OH -> CO2 + H2O, and step (iii) is the rate-determining step. Providing HCOO intermediates by a reaction of CO(a) with the OH- anion, step (i), was deduced by combining an electroconductive PROX catalyst (Pt/CNT(carbon nanotube)) with a hydrogen fuel cell. The oxidation of CO enhanced by H-2 and H2O and the hydrogen isotope effect by H-2/D-2 and H2O/D2O on the FeOx/Pt/TiO2 catalyst are well explained by this mechanism.
WOS记录号	WOS:000268139500063
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21426]
专题	生态环境研究中心_大气环境科学实验室
推荐引用方式 GB/T 7714	Tanaka, Ken-ichi,Shou, Masashi,He, Hong,et al. Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H-2-Oxidation of CO with OH via HCOO Intermediate[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2009,113(28):12427-12433.
APA	Tanaka, Ken-ichi,Shou, Masashi,He, Hong,Shi, Xiaoyan,&Zhang, Xiuli.(2009).Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H-2-Oxidation of CO with OH via HCOO Intermediate.JOURNAL OF PHYSICAL CHEMISTRY C,113(28),12427-12433.
MLA	Tanaka, Ken-ichi,et al."Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H-2-Oxidation of CO with OH via HCOO Intermediate".JOURNAL OF PHYSICAL CHEMISTRY C 113.28(2009):12427-12433.