Degradation of PGM and PGM-free Coatings on PEMWE Porous Transport Layers DOI Creative Commons
Lukas Stein, Arne Dittrich, Dominic Walter

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

A good and long-term stable electrical contact between the porous anode transport layer (PTL) adjacent catalyst is essential for efficient polymer electrolyte membrane water electrolyzers. This study describes extensive comparison of seven titanium passivation-protecting coatings using short- measurements at least 2000 h. The are supported by before after scanning electron microscope investigations cross sections, energy-dispersive X-ray spectroscopy, diffractometry coatings, resistance measurements, ex situ rapid aging tests. Overall, iridium platinum PTL offer outstanding excellent corrosion protection. Compared to uncoated reference sample, shows a 93% reduction in overall degradation rate 7 μV h–1 (at current density 3 cm–2) over 5000 h even reduces ohmic overvoltages time first Interestingly, interface flow field does not appear be influenced precious metal and, hence, need coated. In contrast, niobium nitride under investigation do provide an improvement compared but show dissolution oxidation phenomena, respectively. Titanium hydride produced hydrochloric acid improves 49% 62% terms reference. It also saturation behavior with 23 second 1000 measurement. Ex tests additionally support main trends. For all surface treatments, more detailed information about occurring mechanisms reversible obtained separating into partial rates overvoltage mechanisms.

Language: Английский

The critical role of the anode porous transport layer/catalyst layer interface of polymer electrolyte membrane water electrolyzers: A parametric analysis DOI
Pablo A. García‐Salaberri,

Hung-Ming Chang,

J. Lang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160722 - 160722

Published: Feb. 1, 2025

Language: Английский

Citations

0
The effect of the pretreatment processes on the corrosion and stability of titanium porous transport layer in proton exchange membrane water electrolyzer DOI
Zheng Zhou, Kequan Ye,

Mingruo Hu

et al.

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 113, P. 277 - 292

Published: March 1, 2025

Language: Английский

Citations

0
Degradation of PGM and PGM-free Coatings on PEMWE Porous Transport Layers DOI Creative Commons
Lukas Stein, Arne Dittrich, Dominic Walter

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

A good and long-term stable electrical contact between the porous anode transport layer (PTL) adjacent catalyst is essential for efficient polymer electrolyte membrane water electrolyzers. This study describes extensive comparison of seven titanium passivation-protecting coatings using short- measurements at least 2000 h. The are supported by before after scanning electron microscope investigations cross sections, energy-dispersive X-ray spectroscopy, diffractometry coatings, resistance measurements, ex situ rapid aging tests. Overall, iridium platinum PTL offer outstanding excellent corrosion protection. Compared to uncoated reference sample, shows a 93% reduction in overall degradation rate 7 μV h–1 (at current density 3 cm–2) over 5000 h even reduces ohmic overvoltages time first Interestingly, interface flow field does not appear be influenced precious metal and, hence, need coated. In contrast, niobium nitride under investigation do provide an improvement compared but show dissolution oxidation phenomena, respectively. Titanium hydride produced hydrochloric acid improves 49% 62% terms reference. It also saturation behavior with 23 second 1000 measurement. Ex tests additionally support main trends. For all surface treatments, more detailed information about occurring mechanisms reversible obtained separating into partial rates overvoltage mechanisms.

Language: Английский

Citations

0