Journal
ADVANCED MATERIALS
Volume 30, Issue 45, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201803551
Keywords
electrocatalysis; nanowires; oxygen evolution reaction; semimetallic interfaces
Categories
Funding
- National Natural Science Foundation of China [21427811, 51671003]
- MOST, China [2016YFA0201300]
- Youth Innovation Promotion Association CAS [2016208]
- Cooperation Foundation [16YFXTNC00080]
- National Basic Research Program of China [2017YFA0206701]
- Peking University
- China Postdoctoral Science Foundation [2017M610018]
- Young Thousand Talented Program
Ask authors/readers for more resources
Designing well-defined nanointerfaces is of prime importance to enhance the activity of nanoelectrocatalysts for different catalytic reactions. However, studies on non-noble-metal-interface electrocatalysts with extremely high activity and superior stability at high current density still remains a great challenge. Herein, a class of Co3O4/Fe0.33Co0.66P interface nanowires is rationally designed for boosting oxygen evolution reaction (OER) catalysis at high current density by partial chemical etching of Co(CO3)(0.5)(OH)center dot 0.11H(2)O (Co-CHH) nanowires with Fe(CN)(6)(3-), followed by low-temperature phosphorization treatment. The resulting Co3O4/Fe0.33Co0.66P interface nanowires exhibit very high OER catalytic performance with an overpotential of only 215 mV at a current density of 50 mA cm(-2) and a Tafel slope of 59.8 mV dec(-1) in 1.0 m KOH. In particular, Co3O4/Fe0.33Co0.66P exhibits an obvious advantage in enhancing oxygen evolution at high current density by showing an overpotential of merely 291 mV at 800 mA cm(-2), much lower than that of RuO2 (446 mV). Co3O4/Fe0.33Co0.66P is remarkably stable for the OER with negligible current loss under overpotentials of 200 and 240 mV for 150 h. Theoretical calculations reveal that Co3O4/Fe0.33Co0.66P is more favorable for the OER since the electrochemical catalytic oxygen evolution barrier is optimally lowered by the active Co- and O-sites from the Co3O4/Fe0.33Co0.66P interface.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available