Direct observation of nanoscale Pt electrode agglomeration at the triple phase boundary

ACS Applied Materials & Interfaces
Chen-Chiang YuTaek-Soo Kim

Abstract

Nanoporous platinum electrode thin films were delaminated from yttria-stabilized zirconia (YSZ) substrates via double cantilever beam delamination to reveal the structure located at the interface between electrode and electrolyte. The thermally driven morphological evolution between the electrode top surface and the substrate contact interface of agglomerated nanoporous platinum thin films were compared. We found the temperature required for significant agglomeration to occur was approximately 100 °C higher at the electrolyte contact interface side than at the top surface side. Judging the reaction active site from the electrode top surface could be inaccurate because higher resistance of thermal agglomeration at the interface could retain the reaction active site during fuel cell operation.

References

Jan 27, 2005·Chemical Reviews·Stuart B Adler
Jul 9, 2008·Nano Letters·Pei-Chen SuFritz B Prinz
Dec 20, 2011·Advanced Materials·Arne KlokeSven Kerzenmacher

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Citations

Apr 6, 2016·ACS Applied Materials & Interfaces·Chen-Chiang YuPei-Chen Su
Feb 2, 2017·ACS Applied Materials & Interfaces·Inhwa LeeTaek-Soo Kim
Nov 8, 2019·ACS Applied Materials & Interfaces·Jeong Woo ShinJihwan An

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