Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Viatcheslav Berejnov"'
Publikováno v:
Journal of synchrotron radiation. 28(Pt 3)
X-ray absorption is a sensitive and versatile tool for chemical speciation. However, when high doses are used, the absorbed energy can change the composition, amount and structure of the native material, thereby changing the aspects of the absorption
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22d982b42730a2f8be2e8774cc0b95da
https://pubmed.ncbi.nlm.nih.gov/33949991
https://pubmed.ncbi.nlm.nih.gov/33949991
Autor:
M. Marcia West, Juergen Stumper, Xiaohui Zhu, Adam P. Hitchcock, David A. Shapiro, Darija Susac, Tolek Tyliszczak, Hung-Wei Shiu, Viatcheslav Berejnov, Juan Wu
Publikováno v:
The Journal of Physical Chemistry C. 122:11709-11719
Polymer electrolyte membrane fuel cells (PEMFCs) are a promising and sustainable alternative to internal combustion engines for automotive applications. Polymeric perfluorosulfonic acid (PFSA) plays a key role in PEMFCs as a proton conductor in the a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b3ba1b51ad7e1edaa4f7665e5b81fb9
https://doi.org/10.1021/acs.jpcc.8b02933
https://doi.org/10.1021/acs.jpcc.8b02933
Autor:
Xiaohui Zhu, Adam P. Hitchcock, M. Marcia West, Juergen Stumper, Viatcheslav Berejnov, Darija Susac, Lis G. A. Melo, Juan Wu
Publikováno v:
Journal of Power Sources. 381:72-83
4D imaging - the three-dimensional distributions of chemical species determined using multi-energy X-ray tomography - of cathode catalyst layers of polymer electrolyte membrane fuel cells (PEM-FC) has been measured by scanning transmission x-ray micr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bba377d75fa3c9e168f9075e94f4d6b2
https://doi.org/10.1016/j.jpowsour.2018.01.074
https://doi.org/10.1016/j.jpowsour.2018.01.074
Autor:
Jasna Jankovic, Adam P. Hitchcock, Viatcheslav Berejnov, Lis G. A. Melo, Jürgen Stumper, Darija Susac
Publikováno v:
ECS Transactions. 80:275-282
The perfluorosulfonic acid (PFSA) ionomer commonly used in Polymer Electrolyte Membrane Fuel Cells (PEM-FC) consists of a hydrophobic tetrafluoroethylene backbone with side chains terminated with sulfonate groups responsible for proton conduction. Op
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::045b79e887abc5e56fe9ab510bde349d
https://doi.org/10.1149/08008.0275ecst
https://doi.org/10.1149/08008.0275ecst
Autor:
Viatcheslav Berejnov, Lis G. A. Melo, Gianluigi A. Botton, Juergen Stumper, Darija Susac, Adam P. Hitchcock
Publikováno v:
Journal of Power Sources. 312:23-35
Optimizing the structure of the porous electrodes of polymer electrolyte membrane fuel cells (PEM-FC) can improve device power and durability. Analytical microscopy techniques are important tools for measuring the electrode structure, thereby providi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::504c64366db04cf1faeb22cdf908d583
https://doi.org/10.1016/j.jpowsour.2016.02.019
https://doi.org/10.1016/j.jpowsour.2016.02.019
Publikováno v:
Journal of synchrotron radiation. 25(Pt 3)
A dose integral of time-dependent X-ray absorption under conditions of variable photon energy and changing sample mass is derived from first principles starting with the Beer–Lambert (BL) absorption model. For a given photon energy the BL dose inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54183a5705045f48864b6c486be688dd
https://pubmed.ncbi.nlm.nih.gov/29714195
https://pubmed.ncbi.nlm.nih.gov/29714195
Autor:
Vincent Lee, Viatcheslav Berejnov, M. Marcia West, Silvia Wessel, Monica Dutta, Vesna Colbow, Adam P. Hitchcock
Publikováno v:
Journal of Power Sources. 266:66-78
Scanning Transmission X-ray Microscopy (STXM) at the C 1s, F 1s and S 2p edges has been used to investigate degradation of proton exchange membrane fuel cell (PEM-FC) membrane electrode assemblies (MEA) subjected to accelerated testing protocols. Qua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64c4644df5369374761dcc195203905f
https://doi.org/10.1016/j.jpowsour.2014.04.119
https://doi.org/10.1016/j.jpowsour.2014.04.119
Autor:
Darija Susac, Jürgen Stumper, Mark K. Debe, Sumit Kundu, Viatcheslav Berejnov, Radoslav Atanasoski, Vincent Lee, Adam P. Hitchcock, M. Marcia West
Publikováno v:
Journal of Power Sources. 263:163-174
Scanning transmission X-ray microscopy (STXM) has been applied to characterize nano structured thin film (NSTF) catalysts implemented as electrode materials in proton-exchange-membrane (PEM) fuel cells. STXM is used to study all chemical constituents
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80a47a0b33ce334e7b7be1ba7be57668
https://doi.org/10.1016/j.jpowsour.2014.04.020
https://doi.org/10.1016/j.jpowsour.2014.04.020
Autor:
Vincent Lee, Viatcheslav Berejnov, Darija Susac, Adam P. Hitchcock, Juergen Stumper, Sumit Kundu, Radoslav Atanasoski
Publikováno v:
ECS Transactions. 58:473-479
Nanostructured thin film (NSTF) catalysts are promising for proton exchange membrane fuel cell applications. We have used synchrotron based scanning transmission soft X-ray microscopy (STXM) to evaluate composition and structure of NSTF anodes prepar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b774d10db2e7101a9509d086754429d0
https://doi.org/10.1149/05801.0473ecst
https://doi.org/10.1149/05801.0473ecst
Publikováno v:
ECS Transactions. 50:361-368
Knowledge of the spatial distribution and organization of chemical components in membrane electrode assemblies (MEA) of proton exchange membrane fuel cells (PEM-FC) is essential for developing optimal materials and fabrication methods Depending on fa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72c38107bbcdaa5b1a9a19c7838e0ea8
https://doi.org/10.1149/05002.0361ecst
https://doi.org/10.1149/05002.0361ecst