Activity for the ORR on Pt-Pd-Co ternary alloy electrodes is markedly affected by surface structure and composition
The oxygen reduction reaction (ORR) has been studied on single crystals of the ternary alloys Pt45Pd45Co10 and Pt77Pd8Co15 in O2-saturated 0.1 M HClO4 using a hanging meniscus rotating disk electrode. Specific activity for the ORR depends markedly on the composition and surface structure of the sing...
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doaj-f986170e29f8498095a18d0585d7ef782021-04-16T04:48:34ZengElsevierElectrochemistry Communications1388-24812021-04-01125107007Activity for the ORR on Pt-Pd-Co ternary alloy electrodes is markedly affected by surface structure and compositionMashu Torihata0Masashi Nakamura1Naoto Todoroki2Toshimasa Wadayama3Nagahiro Hoshi4Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33, Yayoicho, Inage-ku, Chiba 263-8522, JapanDepartment of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33, Yayoicho, Inage-ku, Chiba 263-8522, JapanGraduate School of Environmental Studies, Tohoku University, 6-6-2, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, JapanGraduate School of Environmental Studies, Tohoku University, 6-6-2, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, JapanDepartment of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33, Yayoicho, Inage-ku, Chiba 263-8522, Japan; Corresponding author.The oxygen reduction reaction (ORR) has been studied on single crystals of the ternary alloys Pt45Pd45Co10 and Pt77Pd8Co15 in O2-saturated 0.1 M HClO4 using a hanging meniscus rotating disk electrode. Specific activity for the ORR depends markedly on the composition and surface structure of the single crystal electrodes. The activity on Pt45Pd45Co10(hkl) increases in the order Pt45Pd45Co10(100) ≈ Pt45Pd45Co10(111) < Pt45Pd45Co10(110), whereas the activity on Pt77Pd8Co15(hkl) is Pt77Pd8Co15(100) < Pt77Pd8Co15(110) < Pt77Pd8Co15(111). The ORR activity of Pt45Pd45Co10(110) is 2.6 times higher than that of Pt3Co(110), which is known to have high ORR activity. The activity of Pt77Pd8Co15(111) is 2.4 times higher than that of Pt3Co(111). Low energy ion scattering spectroscopy (LE-ISS) shows that Pt and Co coexist at the topmost layer of Pt77Pd8Co15(111). Pt, Pd and Co atoms are dissolved uniformly in the inner layers according to elemental mapping by scanning transmission electron microscopy with energy-dispersive X-ray spectroscopy (STEM-EDS).http://www.sciencedirect.com/science/article/pii/S1388248121000916Oxygen reduction reactionPtPdCo single crystalSurface composition |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mashu Torihata Masashi Nakamura Naoto Todoroki Toshimasa Wadayama Nagahiro Hoshi |
spellingShingle |
Mashu Torihata Masashi Nakamura Naoto Todoroki Toshimasa Wadayama Nagahiro Hoshi Activity for the ORR on Pt-Pd-Co ternary alloy electrodes is markedly affected by surface structure and composition Electrochemistry Communications Oxygen reduction reaction PtPdCo single crystal Surface composition |
author_facet |
Mashu Torihata Masashi Nakamura Naoto Todoroki Toshimasa Wadayama Nagahiro Hoshi |
author_sort |
Mashu Torihata |
title |
Activity for the ORR on Pt-Pd-Co ternary alloy electrodes is markedly affected by surface structure and composition |
title_short |
Activity for the ORR on Pt-Pd-Co ternary alloy electrodes is markedly affected by surface structure and composition |
title_full |
Activity for the ORR on Pt-Pd-Co ternary alloy electrodes is markedly affected by surface structure and composition |
title_fullStr |
Activity for the ORR on Pt-Pd-Co ternary alloy electrodes is markedly affected by surface structure and composition |
title_full_unstemmed |
Activity for the ORR on Pt-Pd-Co ternary alloy electrodes is markedly affected by surface structure and composition |
title_sort |
activity for the orr on pt-pd-co ternary alloy electrodes is markedly affected by surface structure and composition |
publisher |
Elsevier |
series |
Electrochemistry Communications |
issn |
1388-2481 |
publishDate |
2021-04-01 |
description |
The oxygen reduction reaction (ORR) has been studied on single crystals of the ternary alloys Pt45Pd45Co10 and Pt77Pd8Co15 in O2-saturated 0.1 M HClO4 using a hanging meniscus rotating disk electrode. Specific activity for the ORR depends markedly on the composition and surface structure of the single crystal electrodes. The activity on Pt45Pd45Co10(hkl) increases in the order Pt45Pd45Co10(100) ≈ Pt45Pd45Co10(111) < Pt45Pd45Co10(110), whereas the activity on Pt77Pd8Co15(hkl) is Pt77Pd8Co15(100) < Pt77Pd8Co15(110) < Pt77Pd8Co15(111). The ORR activity of Pt45Pd45Co10(110) is 2.6 times higher than that of Pt3Co(110), which is known to have high ORR activity. The activity of Pt77Pd8Co15(111) is 2.4 times higher than that of Pt3Co(111). Low energy ion scattering spectroscopy (LE-ISS) shows that Pt and Co coexist at the topmost layer of Pt77Pd8Co15(111). Pt, Pd and Co atoms are dissolved uniformly in the inner layers according to elemental mapping by scanning transmission electron microscopy with energy-dispersive X-ray spectroscopy (STEM-EDS). |
topic |
Oxygen reduction reaction PtPdCo single crystal Surface composition |
url |
http://www.sciencedirect.com/science/article/pii/S1388248121000916 |
work_keys_str_mv |
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