Electrochemical polymerization of acetylene on Rh electrodes probed by surface-enhanced Raman spectroscopy

Liu, Guokun; Ren, Bin; Wu, De‐Yin; Lin, Jianming; Gu, Ruiting; Zhang, Tian

doi:10.1016/j.jelechem.2006.04.013

Cited by 20 publications

(16 citation statements)

References 41 publications

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“…The consumption of H 2 by acetylene hydrogenation on the N 2 side increases the H 2 concentration difference between both compartments and the OCP (18). Conversely, the electrochemical reduction of acetylene creates a H 2 /C 2 H 2 cell with a voltage greater than the observed OCP (21,23). CVs obtained after a 60 min MEA exposure to acetylene in N 2 and after the 60 min acetylene in N 2 exposure was followed by a 30 min exposure to N 2 were compared to a background CV measured before an acetylene exposure ( figure 2).…”

Section: H 2 /N 2 Testsmentioning

confidence: 94%

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PEMFC Cathode Contamination with Acetylene - Potential Dependency

Zhai

St‐Pierre

2013

ECS Trans.

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Proton exchange membrane fuel cells exposed to 300 ppm C 2 H 2 were studied in situ with chronopotentiometry, chronoamperometry, cyclic voltammetry and gas chromatography. Fuel cells significantly lost and fully regained performance at all tested cell potentials. The performance changes were due to the presence of C 2 H 2 or reaction products on the Pt catalyst surface. Two cyclic voltammetry peak potentials were identified and respectively ascribed to reduced acetylene species or CO (0.57 to 0.76 V vs HRE), and adsorbed C 2 H 2 (1.04-1.1 vs HRE). Gas analysis partially confirmed the existence of these species because only C 2 H 2 , CO 2 and CO were identified and revealed an increase in C 2 H 2 conversion from ~1 to 100 % in the 0.55 to 0.85 V cell voltage range.

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Section: H 2 /N 2 Testsmentioning

confidence: 94%

“…The water discharge reaction was proposed as the rate determining step (22). A polymeric surface species may be formed on the electrode (21,23). These results provide insight into probable acetylene reactions in a PEMFC.…”

Section: Introductionmentioning

confidence: 91%

PEMFC Cathode Contamination with Acetylene - Potential Dependency

Zhai

St‐Pierre

2013

ECS Trans.

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“…These peaks (located~1460 cm −1 , 1270 cm −1 ) were attributed to the transpolyacetylene (trans-PA) chains. It was reported that the exact positions of trans-PA peaks vary with the length of conjugated chains, the excitation wavelength and doping [38][39][40]. Peaks attributed to the trans-PA chains are overlapping with G peak and it becomes more complicated to determine the correct positions of these peaks.…”

Section: A-c:h:sio X Filmsmentioning

confidence: 99%

Multiwavelength Raman analysis of SiOx and N containing amorphous diamond like carbon films

et al. 2015

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“…More target molecule can be detected with using the combination of SERS and IMS techniques. Furthermore, the usage of a SERS tag as 5,5'-dithiobis(2-nitrobenzoic acid [28][29][30], rhodamine dye [31], Texas red [32] enhances the SERS signal and can reach low detection limits compared to label-free detection methods [33,34].…”

Section: Introductionmentioning

confidence: 99%

Immunomagnetic separation and Listeriamonocytogenes detection with surface-enhanced Raman scattering

Akçinar¹,

Aslım²,

Torul³

et al. 2020

Turk J Med Sci

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Background/aim: We aimed to develop a rapid method to enumerate Listeria monocytogenes (L. monocytogenes) utilizing magnetic nanoparticle based preconcentration and surface-enhanced Raman spectroscopy measurements. Materials and methods: Biological activities of magnetic Au-nanoparticles have been observed to have the high biocompatibility, and a sample immunosensor model has been designed to use avidin attached Au-nanoparticles for L. monocytogenes detection. Staphylococcus aureus (S. aureus) and Salmonella typhimurium (S. typhimurium) bacteria cultures were chosen for control studies. Antimicrobial activity studies have been done to identify bio-compatibility and bio-characterization of the Au-nanoparticles in our previous study and capturing efficiencies to bacterial surfaces have been also investigated. Results: We constructed the calibration graphs in various population density of L. monocytogenes as 2.2 × 10 1 to 2.2 × 10 6 cfu/mL and the capture efficiency was found to be 75%. After the optimization procedures, population density of L. monocytogenes and Raman signal intensity showed a good linear correlation (R 2 = 0.991) between 10 2 to 10 6 cfu/mL L. monocytogenes. The presented sandwich assay provides low detection limits and limit of quantification as 12 cfu/mL and 37 cfu/mL, respectively. We also compared the experimental results with reference plate-counting methods and the practical utility of the proposed assay is demonstrated using milk samples. Conclusion: It is focused on the enumeration of L. monocytogenes in milk samples and the comparision of results of milk analysis obtained by the proposed SERS method and by plate counting method stay in food agreement. In the present study, all parameters were optimized to select SERS-based immunoassay method for L. monocytogenes bacteria to ensure LOD, selectivity, precision and repeatablity.

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Electrochemical polymerization of acetylene on Rh electrodes probed by surface-enhanced Raman spectroscopy

Cited by 20 publications

References 41 publications

PEMFC Cathode Contamination with Acetylene - Potential Dependency

PEMFC Cathode Contamination with Acetylene - Potential Dependency

Multiwavelength Raman analysis of SiOx and N containing amorphous diamond like carbon films

Immunomagnetic separation and Listeriamonocytogenes detection with surface-enhanced Raman scattering

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