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Long Z, Gao L, Li Y, et al. Micro Galvanic Cell To Generate PtO and Extend the Triple-Phase Boundary during Self-Assembly of Pt/C and Nafion for Catalyst Layers of PEMFC. ACS Appl Mater Interfaces. 2017;9(44):38165-38169doi: 10.1021/acsami.7b11852.
Long, Z., Gao, L., Li, Y., Kang, B., Lee, J. Y., Ge, J., Liu, C., Ma, S., Jin, Z., & Ai, H. (2017). Micro Galvanic Cell To Generate PtO and Extend the Triple-Phase Boundary during Self-Assembly of Pt/C and Nafion for Catalyst Layers of PEMFC. ACS applied materials & interfaces, 9(44), 38165-38169. https://doi.org/10.1021/acsami.7b11852
Long, Zhi, et al. "Micro Galvanic Cell To Generate PtO and Extend the Triple-Phase Boundary during Self-Assembly of Pt/C and Nafion for Catalyst Layers of PEMFC." ACS applied materials & interfaces vol. 9,44 (2017): 38165-38169. doi: https://doi.org/10.1021/acsami.7b11852
Long Z, Gao L, Li Y, Kang B, Lee JY, Ge J, Liu C, Ma S, Jin Z, Ai H. Micro Galvanic Cell To Generate PtO and Extend the Triple-Phase Boundary during Self-Assembly of Pt/C and Nafion for Catalyst Layers of PEMFC. ACS Appl Mater Interfaces. 2017 Nov 08;9(44):38165-38169. doi: 10.1021/acsami.7b11852. Epub 2017 Oct 27. PMID: 29068195.
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ACS Appl Mater Interfaces. 2017 Nov 08;9(44):38165-38169. doi: 10.1021/acsami.7b11852. Epub 2017 Oct 27.

Micro Galvanic Cell To Generate PtO and Extend the Triple-Phase Boundary during Self-Assembly of Pt/C and Nafion for Catalyst Layers of PEMFC.

ACS applied materials & interfaces

Zhi Long, Liqin Gao, Yankai Li, Baotao Kang, Jin Yong Lee, Junjie Ge, Changpeng Liu, Shuhua Ma, Zhao Jin, Hongqi Ai

Affiliations

  1. Shandong Provincial Key Laboratory of Fluorine Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, Shandong, China.
  2. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, Jilin, China.
  3. Graduate School of the Chinese Academy of Sciences , Beijing 100039, China.
  4. Department of Chemistry, Sungkyunkwan University , Suwon440-746, R. Korea.
  5. Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry , 5625 Renmin Street, Changchun 130022, Jilin, China.

PMID: 29068195 DOI: 10.1021/acsami.7b11852

Abstract

The self-assembly powder (SAP) with varying Nafion content was synthesized and characterized by XRD, XPS, HRTEM, and mapping. It is observed that the oxygen from oxygen functional groups transfers to the surface of Pt and generate PtO during the process of self-assembly with the mechanism of micro galvanic cell, where Pt, carbon black, and Nafion act as the anode, cathode and electrolyte, respectively. The appearance of PtO on the surface of Pt leads to a turnover of Nafion structure, and therefore more hydrophilic sulfonic groups directly contact with Pt, and thus the triple-phase boundary (TPB) has been expanded.

Keywords: Nafion; PEMFCs; Pt/C; catalyst layers; triple-phase boundary

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