Locking the lattice oxygen in RuO2 to stabilize highly active Ru sites in acidic water oxidation
Chongqing University · Sinopec (China) · +1 more institution
Abstract
Abstract Ruthenium dioxide is presently the most active catalyst for the oxygen evolution reaction (OER) in acidic media but suffers from severe Ru dissolution resulting from the high covalency of Ru-O bonds triggering lattice oxygen oxidation. Here, we report an interstitial silicon-doping strategy to stabilize the highly active Ru sites of RuO 2 while suppressing lattice oxygen oxidation. The representative Si-RuO 2 −0.1 catalyst exhibits high activity and stability in acid with a negligible degradation rate of ~52 μV h −1 in an 800 h test and an overpotential of 226 mV at 10 mA cm −2 . Differential electrochemical mass spectrometry (DEMS) results demonstrate that the lattice oxygen oxidation pathway of the…
Citation impact
- FWCI
- 28.57
- Percentile
- 100%
- References
- 61
Authors
7Topics & keywords
- Overpotential
- Catalysis
- Ruthenium
- Ruthenium oxide
- Oxygen
- Dissolution
- Oxygen evolution
- Oxide
- Clean water and sanitation