Multiple‐length scale investigation of Pt/C degradation by identical‐location transmission electron microscopy

다국어 초록 (Multilingual Abstract)

Pt-based electrocatalysts on the cathode side of proton exchange membranefuel cells (PEMFCs) generally undergo severe degradation, which contributes tothe short life span of PEMFCs. Thus, it is crucial to understand the structural degra-dation of Pt-based electrocatalysts. Here, various degradation mechanisms of indi-vidual Pt nanoparticles supported on Vulcan carbon during load-cycle acceleratedstress tests were investigated and quantified by identical-location transmissionelectron microscopy (IL-TEM). The atomic-scale IL-STEM imaging revealed the for-mation of Pt single atoms on the carbon support, which resulted from the dissolu-tion of nanoparticles, and the following pathway change in the oxygen reductionreaction (ORR) was analyzed by rotating ring-disk electrode tests. Our study pro-vides new insight for understanding the relationship between the decline in theORR activity and the formation of Pt atomic species resulting from the electro-chemical degradation of Pt/C.

참고문헌 (Reference)

1 J. C. Meier, 5 : 44-, 2014

2 S. Yang, 55 : 2058-, 2016

3 R. L. Borup, 21 : 192-, 2020

4 Z. Zheng, 12 : 35088-, 2020

5 L. Huang, 54 : 311-, 2021

6 N. Jung, 9 : 433-, 2014

7 Y. -J. Wang, 11 : 258-, 2018

8 D. Y. Chung, 30 : 1704123-, 2018

9 S. G. Ji, 12 : 7317-, 2022

10 S. Kreitmeier, 159 : F787-, 2012

11 J. Qian, 21 : 834-, 2018

12 G. S. Harzer, 165 : F770-, 2018

13 H. L. Xin, 6 : 4241-, 2012

14 H. A. Gasteiger, 56 : 9-, 2005

15 E. Pizzutilo, 163 : F1510-, 2016

16 Z. -M. Zhou, 35 : 1719-, 2010

17 P. Ferreira, 152 : A2256-, 2005

18 A. Ohma, 41 : 775-, 2011

19 D. Johnson, 15 : 1493-, 1970

20 S. Cherevko, 2 : 1471-, 2015

21 A. Pavliˇsic, 165 : F3161-, 2018

22 Y. Li, 45 : 23519-, 2020

23 S. Maass, 176 : 444-, 2008

24 R. Sharma, 239 : 636-, 2018

25 Z. -B. Wang, 34 : 4387-, 2009

26 Y. Zhang, 273 : 62-, 2015

27 L. Castanheira, 5 : 2184-, 2015

28 J. C. Meier, 2 : 832-, 2012

29 K. J. Mayrhofer, 10 : 1144-, 2008

30 H. Yun, 371 : 137795-, 2021

31 A. Zana, 160 : F608-, 2013

32 K. J. Mayrhofer, 185 : 734-, 2008

33 K. Schlögl, 159 : B677-, 2012

34 F. J. Perez-Alonso, 196 : 6085-, 2011

35 K. Higashi, 121 : 22164-, 2017

36 A. A. Topalov, 5 : 631-, 2014

37 R. Borup, 107 : 3904-, 2007

38 Kim Ho Young ; Kim Jin Young ; Joo Sang Hoon, "Pt-based Intermetallic Nanocatalysts for Promoting the Oxygen Reduction Reaction" 대한화학회 42 (42): 724-736, 2021

39 한상욱 ; 김대한 ; 김일희 ; 김영독, "Oxidized Ni Nanostructures Supported by Mesoporous Al2O3: Relationship between the Structure and Reactivity for CO Oxidation Studied via Photoemission Spectroscopy" 대한화학회 37 (37): 674-679, 2016