Ruthenium on boron-doped graphene as a good-stability bifunctional electrocatalyst
The bifunctional electrocatalysts usually have no good performances simultaneously for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Commercial Pt/C electrocatalyst is expensive and not stable; graphene is a good candidate for electrocatalysis but has low activity due to...
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Veröffentlicht in: | Ionics 2022, Vol.28 (1), p.361-368 |
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Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The bifunctional electrocatalysts usually have no good performances simultaneously for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Commercial Pt/C electrocatalyst is expensive and not stable; graphene is a good candidate for electrocatalysis but has low activity due to few active sites. Herein, we dope boron (B) and transitional metal ruthenium (Ru) on graphene to obtain Ru@BG bifunctional electrocatalysts, which show good performances with
∆E
of 0.83 V and 0.85 V for 10%Ru@BG and 6%Ru@BG, respectively. Both of 6%Ru@BG and 10%Ru@BG have high half-wave potential of 0.81 V, which are only more negative by 10 mV than Pt/C electrocatalyst. In addition, 10%Ru@BG shows good stability as well as methanol tolerance, which are much superior to Pt/C electrocatalyst. This work highlights a novel bifunctional electrocatalyst and endows potential in efficient energy storage. |
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ISSN: | 0947-7047 1862-0760 |
DOI: | 10.1007/s11581-021-04328-y |