Abstract
AbstractHere, we report an efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) electrocatalyst, in which ruthenium clusters with a diameter of ∼1 nm are anchored on nitrogen doped carbon (Ru/N‐BP2000). Significantly low overpotentials are required for Ru/N‐BP2000 to catalyze HER (15 mV vs. RHE) and OER (285 mV vs. RHE) in 1 M KOH with current density of 10 mA cm−2, which outperforms Ru/BP2000 (HER: 54.2 mV vs. RHE; OER: 337 mV vs. RHE) as well as the benchmark Pt/C (52 mV vs. RHE) and IrO2 (301 mV vs. RHE). Moreover, ignorable losses in electrocatalytic activities toward HER and OER are recorded for Ru/N‐BP2000 electrocatalyst ascribed to the electronically delocalized Ru atoms induced by the nitrogen atoms. Only 1.53 V is needed for Ru/N‐BP2000 electrocatalyst to drive overall water splitting with stable current density of 10 mA cm−2 for 50 h, which is comparably lower than Pt/C−IrO2 demanding 1.59 V to attain 10 mA cm−2. This work demonstrates the importance of nitrogen doping for promoting the Ru based electrocatalyst's activity and stability in water splitting application.
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