Analysis of the Corrosion Kinetic of Pt/C Catalysts Prepared on Different Carbon Supports Under the “Start-Stop” Cycling | Sciact - CRIS-система Института катализа

Analysis of the Corrosion Kinetic of Pt/C Catalysts Prepared on Different Carbon Supports Under the “Start-Stop” Cycling Научная публикация

Журнал

Electrocatalysis
ISSN: 1868-2529 , E-ISSN: 1868-5994

Вых. Данные

Год: 2016, Том: 7, Номер: 2, Страницы: 159-173 Страниц : 14 DOI: 10.1007/s12678-015-0294-6

Ключевые слова

Carbon support, Electrochemical corrosion, ORR, Pt/C catalysts, Start-stop cycling

Авторы

Gribov E.N. ^1,2 , Kuznetsov A.N. ^1,2 , Voropaev I.N. ² , Golovin V.A. ^1,2,3 , Simonov P.A. ^1,2 , Romanenko A.V. ¹ , Okunev A.G. ^1,2

Организации

1	Boreskov Institute of Catalysis, pr. Lavrentieva, 5, Novosibirsk, Russia 630090
2	Novosibirsk State University, str. Pirogova, 2, Novosibirsk, Russia 630090
3	Research and Educational Center for Energy Efficient Catalysis, Novosibirsk National Research University, Novosibirsk, Russia

Информация о финансировании (5)

1	Федеральное агентство научных организаций России	V.46.2.4.
2	Федеральное агентство научных организаций России	V.46.4.4.
3	Российский фонд фундаментальных исследований	13-03-01023
4	Nissan Motor Co., Ltd.
5	Новосибирский национальный исследовательский государственный университет

A series of 50 wt% Pt/C catalysts based on carbon blacks with different specific surface areas and morphologies was synthesized and investigated using “start-stop” protocol (triangular scan in the 1.0–1.5 V vs. reversible hydrogen electrode (RHE) potential range with a scan rate of 500 mV s−1). The commercial 40 wt% Pt/Vulcan XC-72 and 50 wt% Pt/TEC were used for comparison. The oxygen reduction reaction (ORR) activities and electrochemically active surface area (ECSA) of Pt were obtained at 25 °C in 0.1 M HClO4 electrolyte after every 4000 cycles. All synthesized Pt/C catalysts were characterized by X-ray powder diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), low-temperature nitrogen sorption, CO pulse chemisorption methods, and cycling voltammetry including a rotating disc electrode (RDE) method for analysis of the ORR kinetics. Dependences of the ORR activities, ECSA, and values of Tafel slopes on the number of oxidative cycles were obtained and analyzed in detail. It was shown that the initial values of Tafel slopes of the Pt/C catalysts decrease with increase of the surface area of carbon blacks. The increase in the values of Tafel slopes in the high-current density region with cycling was associated with the degradation of carbon support. The reciprocal ratios of the ECSA to initial values were found to grow linearly on the number of cycles. The ORR surface activity was significantly decreased in the first 8000–10,000 oxidation cycles as the result of changes of the active component and carbon support degradation. The following slight increase in the ORR surface activities with cycling was related to the increase in the Pt particle sizes in the Pt/C catalysts. Modification of Ketjen black EC 600 DJ through pyrocarbon deposition (KB600-C sample) led to appreciable increase of the stability of the Pt/KB600-C sample.

Gribov E.N. , Kuznetsov A.N. , Voropaev I.N. , Golovin V.A. , Simonov P.A. , Romanenko A.V. , Okunev A.G.
Analysis of the Corrosion Kinetic of Pt/C Catalysts Prepared on Different Carbon Supports Under the “Start-Stop” Cycling
Electrocatalysis. 2016. V.7. N2. P.159-173. DOI: 10.1007/s12678-015-0294-6 WOS Scopus РИНЦ CAPlusCA OpenAlex

Опубликована online:	22 дек. 2015 г.
Опубликована в печати:	1 мар. 2016 г.

Web of science:	WOS:000371526600007
Scopus:	2-s2.0-84979243573
РИНЦ:	27093733
Chemical Abstracts:	2015:2061221
Chemical Abstracts (print):	173:314472
OpenAlex:	W2268181684

БД	Цитирований
Web of science	17
Scopus	18
РИНЦ	19
OpenAlex	17