Polymer electrolyte membrane (PEM) electrolysis of H2O2 from O2 and H2O with continuous on-line spectrophotometric product detection: Load flexibility studies

Cost and lifetime currently hinder widespread commercialization of polymer electrolyte membrane fuel cells (PEMFCs). Reduced electrode Pt loadings lower costs; however, the impact of metal loading (on the support) and its relation to degradation (lifetime) remain unclear. The limited research on these parameters stems from synthetic difficulties and lack of in situ analytics. This study addresses these challenges by synthesizing 2D and 3D Pt/C model catalyst systems via two precise routes and systematically varying the loading. Pt dissolution was monitored using on-line inductively coupled plasma mass spectrometry (on-line-ICP-MS), while X-ray spectroscopy techniques were applied to establish the oxidation states of Pt in correlation with metal loading. Dissolution trends emerge which can be explained by three particle proximity dependent mechanisms: (1) shifts in the Nernst dissolution potential, (2) redeposition, and (3) alteration of Pt oxidation states. These results identify engineering limitations, which should be considered by researchers in fuel cell development and related fields.

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Proportional counting of tritium gas generated by polymer electrolyte membrane (PEM) electrolysis

Journal of Radioanalytical and Nuclear Chemistry ◽

10.1007/s10967-009-0247-8 ◽

2009 ◽

Vol 282 (2) ◽

pp. 517-521 ◽

Cited By ~ 4

Author(s):

Aurelie M. Soreefan ◽

Timothy A. DeVol

Keyword(s):

Polymer Electrolyte ◽

Polymer Electrolyte Membrane ◽

Electrolyte Membrane ◽

Pem Electrolysis

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On-line mass spectrometry study of carbon corrosion in polymer electrolyte membrane fuel cells

Electrochemistry Communications ◽

10.1016/j.elecom.2008.05.006 ◽

2008 ◽

Vol 10 (7) ◽

pp. 1048-1051 ◽

Cited By ~ 57

Author(s):

Hyung-Suk Oh ◽

Jong-Gil Oh ◽

Seungjoo Haam ◽

Kundu Arunabha ◽

Bumwook Roh ◽

...

Keyword(s):

Mass Spectrometry ◽

Fuel Cells ◽

Polymer Electrolyte ◽

Polymer Electrolyte Membrane ◽

Carbon Corrosion ◽

Electrolyte Membrane ◽

Line Mass ◽

Mass Spectrometry Study ◽

On Line

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The Dissolution Dilemma for low Pt Loading Polymer Electrolyte Membrane Fuel Cell Catalysts

10.26434/chemrxiv.12866672 ◽

2020 ◽

Author(s):

Daniel John Seale Sandbeck ◽

Niklas Mørch Secher ◽

Masanori Inaba ◽

Jonathan Quinson ◽

Jakob Ejler Sørensen ◽

...

Keyword(s):

Fuel Cell ◽

Polymer Electrolyte ◽

Inductively Coupled Plasma ◽

Polymer Electrolyte Membrane ◽

Oxidation States ◽

Metal Loading ◽

Electrolyte Membrane ◽

On Line ◽

Low Pt Loading ◽

The Impact

Cost and lifetime currently hinder widespread commercialization of polymer electrolyte membrane fuel cells (PEMFCs). Reduced electrode Pt loadings lower costs; however, the impact of metal loading (on the support) and its relation to degradation (lifetime) remain unclear. The limited research on these parameters stems from synthetic difficulties and lack of in situ analytics. This study addresses these challenges by synthesizing 2D and 3D Pt/C model catalyst systems via two precise routes and systematically varying the loading. Pt dissolution was monitored using on-line inductively coupled plasma mass spectrometry (on-line-ICP-MS), while X-ray spectroscopy techniques were applied to establish the oxidation states of Pt in correlation with metal loading. Dissolution trends emerge which can be explained by three particle proximity dependent mechanisms: (1) shifts in the Nernst dissolution potential, (2) redeposition, and (3) alteration of Pt oxidation states. These results identify engineering limitations, which should be considered by researchers in fuel cell development and related fields.

Download Full-text