Ultrafine jagged platinum nanowires enable ultrahigh mass activity for the oxygen reduction reaction
University of California, Los Angeles · California Institute of Technology · +9 more institutions
Abstract
Improving the platinum (Pt) mass activity for the oxygen reduction reaction (ORR) requires optimization of both the specific activity and the electrochemically active surface area (ECSA). We found that solution-synthesized Pt/NiO core/shell nanowires can be converted into PtNi alloy nanowires through a thermal annealing process and then transformed into jagged Pt nanowires via electrochemical dealloying. The jagged nanowires exhibit an ECSA of 118 square meters per gram of Pt and a specific activity of 11.5 milliamperes per square centimeter for ORR (at 0.9 volts versus reversible hydrogen electrode), yielding a mass activity of 13.6 amperes per milligram of Pt, nearly double previously reported best values.…
Citation impact
- FWCI
- 54.60
- Percentile
- 100%
- References
- 40
Authors
18- MLMufan Li
University of California, Los Angeles
- ZZZipeng Zhao
University of California, Los Angeles
- TCTao Cheng
California Institute of Technology
- AFAlessandro Fortunelli
California Institute of Technology, Istituto di Scienza e Tecnologie dell'Informazione "Alessandro Faedo", Institute for the Chemistry of OrganoMetallic Compounds, National Research Council
- CCChih‐Yen Chen
University of California, Los Angeles
Topics & keywords
- Nanowire
- Platinum
- Non-blocking I/O
- Electrochemistry
- Annealing (glass)
- Nanotechnology
- Materials science
- Electrode