Designing bifunctional catalysts with high catalytic activity and durability for electrochemical water splitting has become a promising approach to producing clean and sustainable hydrogen fuels.With high specific sur...Designing bifunctional catalysts with high catalytic activity and durability for electrochemical water splitting has become a promising approach to producing clean and sustainable hydrogen fuels.With high specific surface area and ultra-small size,metal clusters have become a kind of promising catalysts.By introducing Ce species,the noble metal iridium(Ir)can be electronically modulated,thus reduce the activation energy of intermediate,and improve the intrinsic catalytic activity for practical application.The performance of Ir_(3)CeO_(x)/C is more prominent among different feeding ratios of the precursor.The overpotential is only 299 mV for the oxygen evolution reaction(OER),and the overpotential is only23 mV for the hydrogen evolution reaction(HER)at 10 mA/cm^(2) in acid media.The Ir doped with appropriate amount of Ce can obtain excellent OER and HER performance and catalyze water splitting efficiently.This work provides a strategic approach to the formation of clusters of precious metals and rare earths.展开更多
基金Project supported by the National Natural Science Foundation of China(22062019)the Natural Science Foundation of Inner Mongolia of China(2019MS2017)+1 种基金Science and Technology Program of Inner Mongolia Autonomous Region,China(2020PT0003)the Research Innovation Foundation for Graduate of Inner Mongolia Autonomous Region(SZ2020116)。
文摘Designing bifunctional catalysts with high catalytic activity and durability for electrochemical water splitting has become a promising approach to producing clean and sustainable hydrogen fuels.With high specific surface area and ultra-small size,metal clusters have become a kind of promising catalysts.By introducing Ce species,the noble metal iridium(Ir)can be electronically modulated,thus reduce the activation energy of intermediate,and improve the intrinsic catalytic activity for practical application.The performance of Ir_(3)CeO_(x)/C is more prominent among different feeding ratios of the precursor.The overpotential is only 299 mV for the oxygen evolution reaction(OER),and the overpotential is only23 mV for the hydrogen evolution reaction(HER)at 10 mA/cm^(2) in acid media.The Ir doped with appropriate amount of Ce can obtain excellent OER and HER performance and catalyze water splitting efficiently.This work provides a strategic approach to the formation of clusters of precious metals and rare earths.
