| Autor: |
Sui, Nicole L. D., Li, Yinghao, Xie, Wenjie, Wang, Guangzhao, Lee, Jong-Min |
| Přispěvatelé: |
School of Chemistry, Chemical Engineering and Biotechnology, Environmental Chemistry and Materials Centre, Nanyang Environment and Water Research Institute |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Popis: |
Designing robust electrocatalysts for water-splitting is essential for sustainable hydrogen generation, yet difficult to accomplish. In this study, a fast and facile two-step technique to synthesize Ru/RuO2 aerogels for catalyzing overall water-splitting under alkaline conditions is reported. Benefiting from the synergistic combination of high porosity, heterointerface, and tensile strain effects, the Ru/RuO2 aerogel exhibits low overpotential for oxygen evolution reaction (189 mV) and hydrogen evolution reaction (34 mV) at 10 mA cm-2 , surpassing RuO2 (338 mV) and Pt/C (53 mV), respectively. Notably, when the Ru/RuO2 aerogels are applied at the anode and cathode, the resultant water-splitting cell reflected a low potential of 1.47 V at 10 mA cm-2 , exceeding the commercial Pt/C||RuO2 standard (1.63 V). X-ray adsorption spectroscopy and theoretical studies demonstrate that the heterointerface of Ru/RuO2 optimizes charge redistribution, which reduces the energy barriers for hydrogen and oxygen intermediates, thereby enhancing oxygen and hydrogen evolution reaction kinetics. Ministry of Education (MOE) This work was funded by the AcRF Tier 1 (grant RG105/19) provided by the Ministry of Education in Singapore. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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