Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Keegan M. Caldwell"'
Autor:
Sanjeev Mukerjee, Jingkun Li, David E. Ramaker, Keegan M. Caldwell, Joseph M. Ziegelbauer, Anusorn Kongkanand, Ratandeep S. Kukreja, Qingying Jia
Publikováno v:
ACS Catalysis. 6:928-938
One of the major obstacles to the commercialization of proton exchange membrane fuel cells (PEMFCs) is the usage of scarce platinum in the cathode for the oxygen reduction reaction (ORR). Although progress has been made in reducing Pt usage by alloyi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc0b0e965aa58086d8f665a6594e3159
https://doi.org/10.1021/acscatal.5b02750
https://doi.org/10.1021/acscatal.5b02750
Autor:
Sebastian Kaserer, Keegan M. Caldwell, Christina Roth, David E. Ramaker, Julia Melke, Claudia Brieger
Publikováno v:
ECS Transactions. 69:147-156
Low and high temperature polymer electrolyte membrane fuel cells (LT- and HT-PEMFC) are promising systems in a future sustainable energy scenario, where renewable energies can be implemented by a power-to-gas strategy. The supply of hydrogen or metha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::324306d691c3bc9b2168c3434f74b152
https://doi.org/10.1149/06917.0147ecst
https://doi.org/10.1149/06917.0147ecst
Publikováno v:
ChemElectroChem 2(10), 1502-1509 (2015). doi:10.1002/celc.201500228
Application of the Δμ X-ray absorption near-edge spectroscopy analysis technique to a polybenzimidazole-membrane-based high-temperature (170 °C) polymer electrolyte membrane fuel cell (PEMFC) under varying conditions reveals binding-site details f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec3154264040fb8c6b6cf4d01dfda4e4
https://doi.org/10.1002/celc.201500228
https://doi.org/10.1002/celc.201500228
Autor:
Qingying Jia, Sanjeev Mukerjee, David E. Ramaker, Ratandeep S. Kukreja, Joseph M. Ziegelbauer, Anusorn Kongkanand, Keegan M. Caldwell
Publikováno v:
The Journal of Physical Chemistry C. 119:757-765
X-ray adsorption near edge structure (XANES) data at the Co or Ni K-edge, analyzed using the Δμ difference procedure, are reported for dealloyed PtCox and PtNix catalysts (six different catalysts at different stages of life). All catalysts meet the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b8924f5d547b19705a3154a6970b646
https://doi.org/10.1021/jp5098553
https://doi.org/10.1021/jp5098553
Autor:
Joseph M. Ziegelbauer, Sanjeev Mukerjee, Qingying Jia, Zhongyi Liu, Matthew Trahan, David E. Ramaker, Zhiqiang Yu, Keegan M. Caldwell
Publikováno v:
The Journal of Physical Chemistry C. 118:20496-20503
To truly understand the origin of the enhanced oxygen reduction reaction (ORR) activity of Pt-based electrocatalysts over pure Pt, it is essential to characterize the electrocatalysts under ORR operating conditions. Herein, we report a dealloyed Pt1C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cda2edae99084473f90206928276070
https://doi.org/10.1021/jp507204k
https://doi.org/10.1021/jp507204k
Publikováno v:
The Journal of Physical Chemistry C. 117:6210-6217
The effect of H3PO4 as a poison in high temperature polymer electrolyte fuel cells using polybenzimidazole (PBI) membranes was studied as a function of phosphoric acid loading, potential, and temperature. In this work, for the first time, extensive i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aad71c7973d1fcf4abdc93a05e51ed8b
https://doi.org/10.1021/jp311924q
https://doi.org/10.1021/jp311924q
Autor:
Qingying Jia, Matthew Trahan, Keegan M. Caldwell, Carlo U. Segre, David E. Ramaker, Sanjeev Mukerjee
Publikováno v:
Electrochimica Acta. 88:604-613
A novel modeling approach based on FEFF8 calculations is developed to study the relationships between the atomic structure, electronic property, and oxygen reduction reaction (ORR) activity of Pt 3 M nanoparticles (NPs) in combination with experiment
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::804274d54bf967d00c0a94d6c5b51d5c
https://doi.org/10.1016/j.electacta.2012.10.124
https://doi.org/10.1016/j.electacta.2012.10.124
Autor:
Keegan M, Caldwell, David E, Ramaker, Qingying, Jia, Sanjeev, Mukerjee, Joseph M, Ziegelbauer, Ratandeep S, Kukreja, Anusorn, Kongkanand
Publikováno v:
The journal of physical chemistry. C, Nanomaterials and interfaces. 119(1)
X-ray adsorption near edge structure (XANES) data at the Co or Ni K-edge, analyzed using the Δμ difference procedure, are reported for dealloyed PtCox and PtNix catalysts (six different catalysts at different stages of life). All catalysts meet the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::150c1e385dd79527b3ffbeb95040bc76
https://pubmed.ncbi.nlm.nih.gov/26191117
https://pubmed.ncbi.nlm.nih.gov/26191117
Autor:
Zhongyi Liu, Zhiqiang Yu, Qingying Jia, David E. Ramaker, Kara Strickland, Keegan M. Caldwell, Joseph M. Ziegelbauer, Sanjeev Mukerjee
The development of active and durable catalysts with reduced platinum content is essential for fuel cell commercialization. Herein we report that the dealloyed PtCo/HSC and PtCo3/HSC nanoparticle (NP) catalysts exhibit the same levels of enhancement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f819e07b5d0d162eab2d9e4f77c772d5
https://europepmc.org/articles/PMC4578706/
https://europepmc.org/articles/PMC4578706/
Publikováno v:
ECS Meeting Abstracts. :1019-1019
XAS measurements were performed on several dealloyed PtNi3 with high ORR activity and stability prepared as reported previously. [1] (HR)TEM data showed these catalysts possess final PtNi3 alloy interior with a Pt-rich outlayer with approximate 4-5 a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::001f38e728b58eacc12604f7db2ebd59
https://doi.org/10.1149/ma2014-02/21/1019
https://doi.org/10.1149/ma2014-02/21/1019