Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application
Samo za registrovane korisnike
2019
Autori
Elezović, Nevenka R.Lović, J. D.
Jović, Borka M
Zabinski, P.
Wloch, Grzegorz
Jović, Vladimir D
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
The Ag, Pd and AgPd alloys of different morphologies and compositions were electrodeposited onto Au and glassy carbon (GC) disc electrodes from the solution containing 0.001 M PdCl2 + 0.04 M AgCl + 0.1 M HCl + 12 M LiCl under the conditions of non-stationary (RPM = 0, samples AgPd1 and AgPd2) and convective diffusion (RPM = 1000, sample AgPd3). Electrodeposited alloy layers were characterized by the scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). Oxygen reduction reaction (ORR) was investigated on all coatings in 0.1 M NaOH solution saturated with oxygen. The j-E curves for the ORR were recorded by two procedures: (1) samples were cycled with 5 mV s(-1) from open circuit potential (OCP) to -0.8 V for Ag and AgPd alloys (or -0.6 V for pure Pd) and back; (2) samples were cycled with 5 mV s(-1) from open circuit potential to 0.45 V (formation of Ag2O, in the case of Pd formation of PdO and PdO2), from 0.45 V to -0....60 V and back to the OCP. Significant catalytic activity for the Ag and AgPd alloys was detected after cycling electrodes in the potential region of Ag2O formation and reduction. Increase of the catalytic activity for AgPd alloys was, for the first time in the literature, ascribed to the presence of a certain amount of Ag2O which could not be completely reduced during the reverse sweep from 0.45 V to -0.6 V. Catalytic activity of AgPd alloys was found to be closely related to the amount of non-reduced Ag2O (most probably in the form of Ag-hydroxide). In the absence of such treatment, the catalytic activity for the ORR on electrodeposited Ag and AgPd alloy coatings was not detected.
Ključne reči:
XPS / SEM-EDS / Oxygen reduction / Electrodeposition / AgPd alloyIzvor:
Electrochimica Acta, 2019, 307, 360-368Izdavač:
- Pergamon-Elsevier Science Ltd, Oxford
Finansiranje / projekti:
- Razvoj, karakterizacija i primena nanostruktuiranih kompozitnih katalizatora i interaktivnih nosača u gorivnim spregovima i elektrolizi vode (RS-172054)
- Nov pristup dizajniranju materijala za konverziju i skladištenje energije (RS-172060)
DOI: 10.1016/j.electacta.2019.03.177
ISSN: 0013-4686
WoS: 000464956000039
Scopus: 2-s2.0-85064213315
Institucija/grupa
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Elezović, Nevenka R. AU - Lović, J. D. AU - Jović, Borka M AU - Zabinski, P. AU - Wloch, Grzegorz AU - Jović, Vladimir D PY - 2019 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1207 AB - The Ag, Pd and AgPd alloys of different morphologies and compositions were electrodeposited onto Au and glassy carbon (GC) disc electrodes from the solution containing 0.001 M PdCl2 + 0.04 M AgCl + 0.1 M HCl + 12 M LiCl under the conditions of non-stationary (RPM = 0, samples AgPd1 and AgPd2) and convective diffusion (RPM = 1000, sample AgPd3). Electrodeposited alloy layers were characterized by the scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). Oxygen reduction reaction (ORR) was investigated on all coatings in 0.1 M NaOH solution saturated with oxygen. The j-E curves for the ORR were recorded by two procedures: (1) samples were cycled with 5 mV s(-1) from open circuit potential (OCP) to -0.8 V for Ag and AgPd alloys (or -0.6 V for pure Pd) and back; (2) samples were cycled with 5 mV s(-1) from open circuit potential to 0.45 V (formation of Ag2O, in the case of Pd formation of PdO and PdO2), from 0.45 V to -0.60 V and back to the OCP. Significant catalytic activity for the Ag and AgPd alloys was detected after cycling electrodes in the potential region of Ag2O formation and reduction. Increase of the catalytic activity for AgPd alloys was, for the first time in the literature, ascribed to the presence of a certain amount of Ag2O which could not be completely reduced during the reverse sweep from 0.45 V to -0.6 V. Catalytic activity of AgPd alloys was found to be closely related to the amount of non-reduced Ag2O (most probably in the form of Ag-hydroxide). In the absence of such treatment, the catalytic activity for the ORR on electrodeposited Ag and AgPd alloy coatings was not detected. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Electrochimica Acta T1 - Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application EP - 368 SP - 360 VL - 307 DO - 10.1016/j.electacta.2019.03.177 ER -
@article{ author = "Elezović, Nevenka R. and Lović, J. D. and Jović, Borka M and Zabinski, P. and Wloch, Grzegorz and Jović, Vladimir D", year = "2019", abstract = "The Ag, Pd and AgPd alloys of different morphologies and compositions were electrodeposited onto Au and glassy carbon (GC) disc electrodes from the solution containing 0.001 M PdCl2 + 0.04 M AgCl + 0.1 M HCl + 12 M LiCl under the conditions of non-stationary (RPM = 0, samples AgPd1 and AgPd2) and convective diffusion (RPM = 1000, sample AgPd3). Electrodeposited alloy layers were characterized by the scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). Oxygen reduction reaction (ORR) was investigated on all coatings in 0.1 M NaOH solution saturated with oxygen. The j-E curves for the ORR were recorded by two procedures: (1) samples were cycled with 5 mV s(-1) from open circuit potential (OCP) to -0.8 V for Ag and AgPd alloys (or -0.6 V for pure Pd) and back; (2) samples were cycled with 5 mV s(-1) from open circuit potential to 0.45 V (formation of Ag2O, in the case of Pd formation of PdO and PdO2), from 0.45 V to -0.60 V and back to the OCP. Significant catalytic activity for the Ag and AgPd alloys was detected after cycling electrodes in the potential region of Ag2O formation and reduction. Increase of the catalytic activity for AgPd alloys was, for the first time in the literature, ascribed to the presence of a certain amount of Ag2O which could not be completely reduced during the reverse sweep from 0.45 V to -0.6 V. Catalytic activity of AgPd alloys was found to be closely related to the amount of non-reduced Ag2O (most probably in the form of Ag-hydroxide). In the absence of such treatment, the catalytic activity for the ORR on electrodeposited Ag and AgPd alloy coatings was not detected.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Electrochimica Acta", title = "Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application", pages = "368-360", volume = "307", doi = "10.1016/j.electacta.2019.03.177" }
Elezović, N. R., Lović, J. D., Jović, B. M., Zabinski, P., Wloch, G.,& Jović, V. D.. (2019). Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application. in Electrochimica Acta Pergamon-Elsevier Science Ltd, Oxford., 307, 360-368. https://doi.org/10.1016/j.electacta.2019.03.177
Elezović NR, Lović JD, Jović BM, Zabinski P, Wloch G, Jović VD. Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application. in Electrochimica Acta. 2019;307:360-368. doi:10.1016/j.electacta.2019.03.177 .
Elezović, Nevenka R., Lović, J. D., Jović, Borka M, Zabinski, P., Wloch, Grzegorz, Jović, Vladimir D, "Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application" in Electrochimica Acta, 307 (2019):360-368, https://doi.org/10.1016/j.electacta.2019.03.177 . .