Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 34, Pages 9937-9941Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201604040
Keywords
corrosion; electrocatalysts; iron; oxygen evolution reaction; rust
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Funding
- National Program on Key Basic Research Project of China (973 Program) [2014CB932300, 2012CB215500]
- National Natural Science Foundation of China [21422108, 51472232, 51301160]
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Developing effective ways to recycle rusted stainless steel and to promote the sluggish oxygen evolution reaction (OER), associated with water splitting and metal-air batteries, is important for a resource-sustainable and environment-friendly society. Herein, we propose a strategy to enable rusted stainless steel plate to be used as an abundant and low-cost OER catalyst, wherein a hydrothermal combined in situ electrochemical oxidation-reduction cycle (EORC) method is developed to mimic and expedite the corrosion process, and thus activate stainless steel into free-standing OER electrodes. Benefiting from the plentiful electrolyte-accessible Fe/(Ni) oxyhydroxides, high conductivity and mechanical stability, this electrode exhibits remarkable OER performances including low overpotential, fast kinetics, and long-term durability. The slight degradation in current after long-term use can be repaired immediately in situ by an EORC.
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