2016
DOI: 10.1016/j.apcata.2016.08.008
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Bimetallic PtCu core-shell nanoparticles in PtCu/C electrocatalysts: Structural and electrochemical characterization

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Cited by 48 publications
(31 citation statements)
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“…A significant difference in the composition of the initial S1-S3 samples had practically no effect on the position of the characteristic reflections of the X-ray diffraction pattern, in particular, on 2 theta angles of the characteristic maximum 111 (Table 1, Figure 1b). Apparently, a larger or a smaller fraction of copper in these samples is contained in X-ray amorphous oxides [45], while the composition of the metal component of various catalysts is indeed similar. At the same time, the 2-theta angle of the maximum 111 in the diffraction patterns decreases with the transition from the starting materials (S1, S2, S3) to the de-alloyed catalysts obtained from them (Table 1, Figure 1).…”
Section: Methanol Electro-oxidation At the Alloyed And De-alloyed Plamentioning
confidence: 85%
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“…A significant difference in the composition of the initial S1-S3 samples had practically no effect on the position of the characteristic reflections of the X-ray diffraction pattern, in particular, on 2 theta angles of the characteristic maximum 111 (Table 1, Figure 1b). Apparently, a larger or a smaller fraction of copper in these samples is contained in X-ray amorphous oxides [45], while the composition of the metal component of various catalysts is indeed similar. At the same time, the 2-theta angle of the maximum 111 in the diffraction patterns decreases with the transition from the starting materials (S1, S2, S3) to the de-alloyed catalysts obtained from them (Table 1, Figure 1).…”
Section: Methanol Electro-oxidation At the Alloyed And De-alloyed Plamentioning
confidence: 85%
“…Given the accuracy of the measurements, this indicates the absence of a significant effect of the initial composition and acid treatment on their size. At the same time, it should be noted that the application of the Scherrer equation to calculate the average size of bimetallic nanoparticles may provide results which are not quite accurate, since such calculation does not take into account the contribution of the inhomogeneous structure of nanoparticles to the broadening of reflection 111 [45].…”
Section: Methanol Electro-oxidation At the Alloyed And De-alloyed Plamentioning
confidence: 99%
“…1 и 2. Значения струк-турных параметров для приготовленных катализаторов согласуются со значениями, определенными ранее для аналогичных материалов [3,4]. Сразу следует обратить внимание на относительно малые значения парциальных координационных чисел N Cu−Cu и N Cu−Pt , сопоставимые по величине со значением N Cu−O .…”
Section: результатыunclassified
“…Наблюдаемое увеличение суммарного координационно-го числа медь−металл вместе с уменьшением коорди-национного числа медь−кислород может быть связано с частичным восстановлением ионов меди в процессе термической обработки [24]. Сделанный вывод подтвер-ждается результатами анализа химического состава на-ночастиц, выполненного для аналогичных материалов до и после их обработки в кислоте [3], в результате которой около половины атомов меди вымывается из образца. Отметим, что анализ химического состава исследуемых материалов, выполненный до и после длительного элек-трохимического тестирования, также подтверждает факт вымывания приблизительно 50% меди из образцов.…”
Section: результатыunclassified
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