2014
DOI: 10.1016/j.jpowsour.2014.06.146
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Study of low concentration CO poisoning of Pt anode in a proton exchange membrane fuel cell using spatial electrochemical impedance spectroscopy

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Cited by 58 publications
(56 citation statements)
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References 101 publications
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“…The current density redistribution varied from +13% for segment 1 to -15% for segment 10 due to the operation of the cell in the galvanostatic mode, which required an overall constant current. This observation was different from previously observed spatial PEMFC performances when exposed to CO in a H 2 stream or C 2 H 2 in air, where the performances of the inlet segments were lower than those of the outlet segments [59][60][61][62][63][64][65]68]. It is likely that at steady state, CH 3 CN impacted the inlet part of the MEA.…”
contrasting
confidence: 92%
See 1 more Smart Citation
“…The current density redistribution varied from +13% for segment 1 to -15% for segment 10 due to the operation of the cell in the galvanostatic mode, which required an overall constant current. This observation was different from previously observed spatial PEMFC performances when exposed to CO in a H 2 stream or C 2 H 2 in air, where the performances of the inlet segments were lower than those of the outlet segments [59][60][61][62][63][64][65]68]. It is likely that at steady state, CH 3 CN impacted the inlet part of the MEA.…”
contrasting
confidence: 92%
“…In contrast, a segmented cell system provides locally resolved voltage, current and impedance data. It is a powerful tool for understanding the details of fuel cell operations under different conditions [48][49][50][51][52][53][54][55], the detection of membrane electrode assembly (MEA) defects [56,57], hydrogen recirculation [58], and hydrogen stream CO poisoning [59][60][61][62][63][64][65]. Information about the current distribution when exposed to organic airborne pollutants is crucial to understanding the poisoning mechanism, improving the PEMFC environmental adaptability and developing useful mitigation strategies.…”
Section: Introductionmentioning
confidence: 99%
“…[7][8][9] The main drawback of this synthesis route is that the typical effluents coming from hydrocarbon reforming contain about a 10 vol% of CO, which apart from being toxic for people, is a poisoning agent for the platinum-based anode catalysts in PEMFC. 10 Then, it is mandatory to reduce the CO concentration to a trace level below 10 ppm, which is the tolerance level of the Pt catalysts. 2,9,[11][12][13] For CO removal from reformate gases, the gas stream is treated in a Water Gas Shift (WGS) reactor where most CO is oxidised to CO 2 .…”
Section: Introductionmentioning
confidence: 99%
“…For instance, in experiments of Pastor‐Fernández et al, similar current profiles were measured for a parallel set of 18 650 cells with different states of health . In addition, similar effects of a nonuniform current distribution were observed in experiments with segmented fuel cells and spatially reduced active area . Furthermore, overpotential overshooting due to nonsteady currents was seen in the simulations of a direct methanol fuel cell .…”
Section: Resultsmentioning
confidence: 54%