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Stability of Multivalent Ruthenium on CoWO4 Nanosheets for Improved Electrochemical Water Splitting with Alkaline Electrolyte.
- Source :
- ChemSusChem; 7/8/2024, Vol. 17 Issue 13, p1-11, 11p
- Publication Year :
- 2024
-
Abstract
- Engineering low‐cost electrocatalysts with desired features is vital to decrease the energy consumption but challenging for superior water splitting. Herein, we development a facile strategy by the addition of multivalence ruthenium (Ru) into the CoWO4/CC system. During the synthesis process, the most of Ru3+ ions were insinuated into the lattice of CoWO4, while the residual Ru3+ ions were reduced to metallic Ru and further attached to the interface between carbon cloth and CoWO4 sheets. The optimal Ru2(M)−CoWO4/CC exhibited superior performance for the HER with an overpotential of 85 mV@10 mA cm−2, which was much better than most of reported electrocatalysts, regarding OER, a low overpotential of 240 mV@10 mA cm−2 was sufficient. In comparison to Ru2(0)−CoWO4/CC with the same Ru mass loading, multivalence Ru2(M)−CoWO4/CC required a lower overpotential for OER and HER, respectively. The Ru2(M)−CoWO4/CC couple showed excellent overall water splitting performance at a cell voltage of 1.48 V@10 mA cm−2 for used as both anodic and cathodic electrocatalysts. Results of the study showed that the electrocatalytic activity of Ru2(M)−CoWO4/CC was attributed to the in‐situ transformation of Ru/Co sites, the multivalent Ru ions and the synergistic effect of different metal species stimulated the intrinsic activity of CoWO4/CC. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18645631
- Volume :
- 17
- Issue :
- 13
- Database :
- Complementary Index
- Journal :
- ChemSusChem
- Publication Type :
- Academic Journal
- Accession number :
- 178316840
- Full Text :
- https://doi.org/10.1002/cssc.202301952