TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Alushi, Alion
A1  - Al-Musawi, Atheer
A1  - Kim, Kyuman
A1  - Lee, Chong-Yong
A1  - Wagner, Klaudia
A1  - Swiegers, Gerhard F.
T1  - Hydrogen Generation by Nickel Electrodes Coated with Linear Patterns of PTFE
JF  - Journal of Composites Science
N2  - Previous studies have shown that partially coating electrode surfaces with patterns of ‘islands’ of hydrophobic tetrafluoroethylene (PTFE; Teflon) may lead to more energy efficient gas generation. This occurred because the gas bubbles formed preferentially on the PTFE, thereby freeing up the catalytically active metallic surfaces to produce the gas more efficiently. This work examined electrochemically induced hydrogen bubble formation on a nickel electrode surface that had been coated with linear patterns of PTFE. The impact of the PTFE line size (width) and degree of coverage was examined and analyzed. No improvement in electrical energy efficiency was observed up to 15 mA/cm 2 when comparing the PTFE-coated electrodes with the control bare uncoated electrode. However, increasing PTFE coverage up to 15% generally improved electrolysis performance. Moreover, samples with 50% wider lines performed better (at the equivalent PTFE coverage), yielding an overpotential decline of up to 3.9% depending on the PTFE coverage. A ‘bubble-scavenging’ phenomenon was also observed, wherein bubbles present on the PTFE lines rapidly shrunk until they disappeared.
KW  - Wasserstoff
KW  - Hydrogen
KW  - Electrolysis
KW  - Efficiency
KW  - PTFE
KW  - Overpotential
KW  - Bubbles
KW  - Elektrolyse
KW  - Effizienz
KW  - Polytetrafluorethylene
Y1  - 2024
UN  - https://nbn-resolving.org/urn:nbn:de:hbz:832-epub4-27575
SN  - 2504-477X
SS  - 2504-477X
U6  - https://doi.org/10.3390/jcs8090368
DO  - https://doi.org/10.3390/jcs8090368
VL  - 8
IS  - 9
PB  - MDPI
ER  -