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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .


The synergistic effect of Hf-O-Ru bonds and oxygen vacancies in Ru/HfO2 for enhanced hydrogen evolution

DC Field Value Language Li, Guangkai ko Jang, Haeseong ko Liu, Shangguo ko Li, Zijian ko Kim, Min Gyu ko Qin, Qing ko Liu, Xien ko Cho, Jaephil ko 2022-04-22T00:20:57Z - 2022-04-15 ko 2022-03 ko
dc.identifier.citation NATURE COMMUNICATIONS, v.13, no.1, pp.1270 ko
dc.identifier.issn 2041-1723 ko
dc.identifier.uri -
dc.description.abstract Ru nanoparticles have been demonstrated to be highly active electrocatalysts for the hydrogen evolution reaction (HER). At present, most of Ru nanoparticles-based HER electrocatalysts with high activity are supported by heteroatom-doped carbon substrates. Few metal oxides with large band gap (more than 5 eV) as the substrates of Ru nanoparticles are employed for the HER. By using large band gap metal oxides substrates, we can distinguish the contribution of Ru nanoparticles from the substrates. Here, a highly efficient Ru/HfO2 composite is developed by tuning numbers of Ru-O-Hf bonds and oxygen vacancies, resulting in a 20-fold enhancement in mass activity over commercial Pt/C in an alkaline medium. Density functional theory (DFT) calculations reveal that strong metal-support interaction via Ru-O-Hf bonds and the oxygen vacancies in the supported Ru samples synergistically lower the energy barrier for water dissociation to improve catalytic activities. Although ruthenium nanomaterials have proven to be effective catalysts for H-2 evolution, there is still room for activity improvements. Here, authors develop an efficient Ru/HfO2 electrocatalyst with tuned Ru-O-Hf bonds and oxygen vacancies that shows high activities for alkaline H-2 evolution. ko
dc.language 영어 ko
dc.publisher NATURE PORTFOLIO ko
dc.title The synergistic effect of Hf-O-Ru bonds and oxygen vacancies in Ru/HfO2 for enhanced hydrogen evolution ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85126243715 ko
dc.identifier.wosid 000767892300014 ko
dc.type.rims ART ko
dc.identifier.doi 10.1038/s41467-022-28947-9 ko
dc.identifier.url ko
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