2012
DOI: 10.1016/j.ijhydene.2011.10.104
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In-situ investigation on the CO tolerance of carbon supported Pd–Pt electrocatalysts with low Pt content by electrochemical impedance spectroscopy

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Cited by 20 publications
(3 citation statements)
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“…The morphology and composition of the spent Rh 2 Sb NBs/C were largely maintained, whereas severe aggregations occurred for the spent Rh NBs/C and commercial Pt/C (Figure S15, Supporting Information). Considering the existence of trace amount of CO in the actual low‐temperature hydrogen‐oxygen fuel cell, [ 36 ] the resistance to CO poisoning of catalyst was therefore further investigated. [ 37 ] Compared to the obvious decays in the current densities for Rh NBs/C and Pt/C in the presence of 100 ppm CO, Rh 2 Sb NBs/C displayed a much smaller decay in current density from HOR polarization curves (Figure S16, Supporting Information).…”
Section: Resultsmentioning
confidence: 99%
“…The morphology and composition of the spent Rh 2 Sb NBs/C were largely maintained, whereas severe aggregations occurred for the spent Rh NBs/C and commercial Pt/C (Figure S15, Supporting Information). Considering the existence of trace amount of CO in the actual low‐temperature hydrogen‐oxygen fuel cell, [ 36 ] the resistance to CO poisoning of catalyst was therefore further investigated. [ 37 ] Compared to the obvious decays in the current densities for Rh NBs/C and Pt/C in the presence of 100 ppm CO, Rh 2 Sb NBs/C displayed a much smaller decay in current density from HOR polarization curves (Figure S16, Supporting Information).…”
Section: Resultsmentioning
confidence: 99%
“…However, the study of the poisoning effects of reformate mixtures is usually limited to CO 2 and CO, perhaps due the fact that they are common to most reforming processes, especially the reforming of alcohols and hydrocarbons. The effects of CO are usually associated to preferential surface adsorption of its molecules on the catalyst, thereby reducing the electro-active area [14]. The effects of CO 2 on the other hand are limited to dilution of the anode feed, with the possibility of chemical or electrochemical reduction into CO [15].…”
Section: Introductionmentioning
confidence: 99%
“…It has been reported that a CO concentration of 10 ppm and above will poison Pt [ 1 , 2 ]. A significant amount of research has been carried out to improve the CO tolerance by using advanced Pt alloy catalysts [ 3 , 4 , 5 , 6 ], or alternative membranes capable of operating at higher temperatures [ 7 , 8 , 9 , 10 , 11 ]. H 2 purifying devices can also be used to remove CO, but the use of such additional steps has a negative effect on the overall process in terms of cost and efficiency [ 12 , 13 ].…”
Section: Introductionmentioning
confidence: 99%