Noble metal-free bifunctional oxygen evolution and oxygen reduction acidic media electro-catalysts

Patel, Prasad Prakash; Datta, Moni Kanchan; Velikokhatnyi, Oleg I.; Kuruba, Ramalinga; Damodaran, Krishnan; Jampani, Prashanth; Gattu, Bharat; Shanthi, Pavithra Murugavel; Damle, Sameer S.; Kumta, Prashant N.

doi:10.1038/srep28367

Noble metal-free bifunctional oxygen evolution and oxygen reduction acidic media electro-catalysts

Journal Article · Wed Jul 06 00:00:00 EDT 2016 · Scientific Reports

DOI:https://doi.org/10.1038/srep28367· OSTI ID:1312963

Patel, Prasad Prakash ^[1]; Datta, Moni Kanchan ^[2]; Velikokhatnyi, Oleg I. ^[2]; Kuruba, Ramalinga ^[2]; Damodaran, Krishnan ^[2]; Jampani, Prashanth ^[2]; Gattu, Bharat ^[2]; Shanthi, Pavithra Murugavel ^[2]; Damle, Sameer S. ^[2]; Kumta, Prashant N. ^[2]

Univ. of Pittsburgh, Pittsburgh, PA (United States); University of Pittsburgh
Univ. of Pittsburgh, Pittsburgh, PA (United States)

We report that identification of low cost, highly active, durable completely noble metal-free electro-catalyst for oxygen reduction reaction (ORR) in proton exchange membrane (PEM) fuel cells, oxygen evolution reaction (OER) in PEM based water electrolysis and metal air batteries remains one of the major unfulfilled scientific and technological challenges of PEM based acid mediated electro-catalysts. In contrast, several non-noble metals based electro-catalysts have been identified for alkaline and neutral medium water electrolysis and fuel cells. Furthermore, we report for the very first time, F doped Cu_1.5Mn_1.5O₄, identified by exploiting theoretical first principles calculations for ORR and OER in PEM based systems. The identified novel noble metal-free electro-catalyst showed similar onset potential (1.43 V for OER and 1 V for ORR vs RHE) to that of IrO₂ and Pt/C, respectively. The system also displayed excellent electrochemical activity comparable to IrO₂ for OER and Pt/C for ORR, respectively, along with remarkable long term stability for 6000 cycles in acidic media validating theory, while also displaying superior methanol tolerance and yielding recommended power densities in full cell configurations.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Pittsburgh, Pittsburgh, PA (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0001531

OSTI ID:: 1312963

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Vol. 6; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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