纳米片
材料科学
电子转移
分解水
兴奋剂
密度泛函理论
杂原子
纳米结构
纳米材料基催化剂
氧化还原
电解质
析氧
价(化学)
电子结构
电化学
光化学
光电子学
纳米技术
电极
纳米颗粒
催化作用
物理化学
计算化学
化学
戒指(化学)
光催化
有机化学
生物化学
冶金
作者
Leigang Li,Lingzheng Bu,Bolong Huang,Pengtang Wang,Chenqi Shen,Shuxing Bai,Ting‐Shan Chan,Qi Shao,Zhiwei Hu,Xiaoqing Huang
标识
DOI:10.1002/adma.202105308
摘要
To improve the electroactivity and stability of electrocatalysts, various modulation strategies have been applied in nanocatalysts. Among different methods, heteroatom doping has been considered as an effective method, which modifies the local bonding environments and the electronic structures. Meanwhile, the design of novel two-dimensional (2D) nanostructures also offers new opportunities for achieving efficient electrocatalysts. In this work, Mn-doped ultrathin Ru nanosheet branches (RuMn NSBs), a newly reported 2D nanostructure, is synthesized. With the ultrathin and naturally abundant edges, the RuMn NSBs have exhibited bifunctionalities of hydrogen evolution reaction and oxygen evolution reaction with high electroactivity and durability in different electrolytes. Experimental characterizations have revealed that RuO bonds are shortened due to Mn doping, which is the key factor that leads to improved electrochemical performances. Density functional theory (DFT) calculations have confirmed that the introduction of Mn enables flexible modulations on the valence states of Ru sites. The inversed redox state evolutions of Ru and Mn sites not only improve the electroactivity for the water splitting but also the long-term stability due to the pinning effect of Ru sites. This work has provided important inspirations for the design of future advanced Ru-based electrocatalysts with high performances and durability.
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