Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (1): 47-58.DOI: 10.1016/S1872-2067(21)63896-2
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Jiaheng Penga, Peng Taoa, Chengyi Songa, Wen Shanga, Tao Denga,b, Jianbo Wua,b,c,d,*()
Received:
2021-05-30
Accepted:
2021-06-15
Online:
2022-01-18
Published:
2021-11-15
Contact:
Jianbo Wu
About author:
* Tel/Fax: +86-21-54745582; E-mail: jianbowu@sjtu.edu.cnSupported by:
Jiaheng Peng, Peng Tao, Chengyi Song, Wen Shang, Tao Deng, Jianbo Wu. Structural evolution of Pt-based oxygen reduction reaction electrocatalysts[J]. Chinese Journal of Catalysis, 2022, 43(1): 47-58.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63896-2
Fig. 1. (A) Pourbaix diagram of Pt(100); (B) CV spectra and corresponding dissolution amount of Pt(110), Pt(100), and Pt(111); (C) Graphical representation of the main reactions that occur at the Pt electrodes (pH = 1). Reprinted with permission from: (A) Ref. [7], copyright 2018, American Chemical Society and (B) Ref. [9], Copyright 2016, American Chemical Society.
Fig. 2. (A) CV spectra and in situ STM images of Pt(111); (B) Depiction of the surface roughing mechanism; (C) STM images of Pt(111) after different protocols. Reprinted with permission from: (A,B) Ref. [15], copyright 2017, American Chemical Society and (C) Ref. [14], Copyright 2018, Elsevier.
Fig. 3. (A) Sequential TEM images of the icosahedral and cubic Pt NPs; (B) Plots for the oxidative etching of the icosahedral Pt NPs at different stages of the reaction. (C) Analysis of the etching modes of the different sites on a cubic Pt NP. Reprinted with permission from Ref. [18], Copyright 2017, American Chemical Society.
Fig. 4. (A) TEM images; (B) Schematic of the etching process; (C) Strain map before etching; (D) Etching distance in the three directions; (E) Etching rates in the three directions. Reprinted with permission from Ref. [32], Copyright 2020, Elsevier.
Fig. 5. (A) Scheme of the synthesis of the Pt-Ir-Pd nanocages; (B) HAADF-STEM image and EDX maps of the Pt-Ir-Pd nanocage; (C) Scheme of the synthesis of porous Pt3Ni NWs; (D) TEM and HAADF-STEM images of the Pt3Ni6 NWs; (E) TEM and HAADF-STEM images of the porous treated Pt3Ni6 NWs. Reprinted with permission from: (A,B) Ref. [40], Copyright 2020, Wiley-VCH and (C-E) Ref. [42], Copyright 2017, Wiley-VCH.
Fig. 6. (A) Indirect nanoplasmonic sensing centroid shift vs. time in Ar at 453 K for Pt clusters with different size distributions; (B) Cluster area distribution before and after annealing. Reprinted with permission from Ref. [49], Copyright 2014, American Chemical Society.
Fig. 7. (A-C) HAADF-STEM images of PtM3/C; (D,E) STEM-EELS mapping of the PtCo3 and PtNi3 NPs; (F) Surface composition determined by XPS; (G,H) Structure models of (D) and (E); (I) Ni content and particle size of the PtNi3 NPs at 400 and 600 °C; (J) Scheme of the surface composition effect on coalescence. Reprinted with permission from ref. [56], Copyright 2020, American Chemical Society.
Fig. 8. (A) Scheme of the Pt NW formation process in the presence of H2; (B) TEM images of the growth process; (C) TEM images of oriented attachment growth along the Pt(100) facet. Reprinted with permission from Ref. [69], Copyright 2017, Wiley-VCH.
Fig. 9. (A,B) XANES spectra of the PtCo/C electrocatalyst at the Co K-edge before and after ADT using different potentials; (C-F) STEM images of an oxidized Pt3Co NP; (G,H) Bright-field STEM images of an oxidized Pt3Co NP. Reprinted with permission from: (A,B) Ref. [11], Copyright 2019, American Chemical Society; (C)-(H) Ref. [78], Copyright 2017, American Chemical Society.
Fig. 10. (A) Schematic diagram of the formation of phase-segregated octahedral PtNi NPs; (B-E) Elemental maps of the PtNi NPs during the synthesis process; (F-H) HAADF-STEM images of the phase-segregated hierarchical PtNi NPs and their derivatives produced by chemical etching; (I) EDX elemental maps of the octahedral skeletal Pt-based NPs. Reprinted with permission from Ref. [81], Copyright 2015, American Chemical Society.
Fig. 11. (A-D) HAADF-STEM images along the (100) surface; (E-H) HAADF-STEM images along the (110) surface; (I) Scheme of the evolution process of the Pt3Co NCs under LTDAP and DHTAP. Reprinted with permission from Ref. [88]. Copyright 2021, American Chemical Society.
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