Development of Supported Bifunctional Electrocatalysts for Unitized Regenerative Fuel Cells (Record no. 45841)

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control field 20250625140654.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-11625
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245 10 - TITLE STATEMENT
Title Development of Supported Bifunctional Electrocatalysts for Unitized Regenerative Fuel Cells
490 0# - SERIES STATEMENT
Volume/sequential designation Journal of The ElectroChemical Society, 149, p.1092-1099, 2002
520 3# - SUMMARY, ETC.
Summary, etc. Mixed metal catalysts containing Pt, Ir, Ru, Os, and Rh were synthesized on three different conductive oxide supports, Ebonex, which is a mixture of Ti4O7 and other phases, phase-pure microcrystalline Ti4O7 , and Ti0.9Nb0.1O2 , a doped rutile compound. Ebonex-supported catalysts were prepared as arrays and screened combinatorially for activity and stability as bifunctional oxygen reduction/water oxidation catalysts. The highest activity and stability was found in the Pt-Ru-Ir ternary region at compositions near Pt4Ru4Ir1 . X-ray near edge absorption spectra indicated a significant electronic interaction between the catalyst and the support, and a substantial increase in catalyst utilization was observed, even though the support surface areas were relatively low. Both Ebonex and Ti4O7 have short-lived electrochemical stability under conditions of oxygen evolution at 11.6 V vs. RHE in 0.5 M H2SO4 . Current at these supported catalysts gradually decreases, and the decrease is attributed to loss of electronic conductivity. Ebonex and Ti4O7 are also thermally oxidized in air at temperatures above 400°C. In contrast, Ti0.9Nb0.1O2 , which has a nondefective oxygen lattice, is quite resistant to electrochemical and thermal oxidation. Conditioning of Ti0.9Nb0.1O2-supported Pt4Ru4Ir1 at positive potentials had little effect on the activity of the catalyst.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Chen, G.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Bare, S.R.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Mallouk, T.E.
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Uniform Resource Identifier <a href="https://drive.google.com/file/d/1uyRiRiC4SWRTVgH5Kbj7VRv-z9iXWc9c/view?usp=drivesdk">https://drive.google.com/file/d/1uyRiRiC4SWRTVgH5Kbj7VRv-z9iXWc9c/view?usp=drivesdk</a>
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-11625 25.06.2025 25.06.2025 Documentos solicitados