电催化剂
材料科学
碳纤维
纳米技术
过渡金属
金属
催化作用
背景(考古学)
电池(电)
化学工程
复合材料
冶金
复合数
电化学
有机化学
电极
物理化学
物理
工程类
古生物学
生物
功率(物理)
量子力学
化学
作者
Qing Liu,Yufeng Xu,Yingxuan Zhao,Kai Wang,Chenjia Liang,Siyuan Zhao,Xianghao Wang,Xiangke Guo,Nianhua Xue,Weiping Ding
标识
DOI:10.1002/admt.202202007
摘要
Abstract Herein, a novel method, heat mechanochemical synthesis (HMCS), is reported for facile and scalable preparation of electrocatalysts with metallic sites anchored on carbon materials. The method simultaneously provides mechanical energy and heat to drive reaction, by which target metal atoms are efficiently trapped in N‐doped and defect‐rich carbon that prepared in advance (NC). The advantages of this method are: (1) high contents of metals at the outermost surface; (2) unique metal sites formed under collisions with mechanical energy; and (3) not annealed at high temperatures, which would retain some unique active sites on the materials. A series of unitary transition metal (Cr, Mn, Fe, Co, Ni, Cu, or Zn) superficially anchored carbons are obtained via the HMCS. More than this, it is quite convenient to prepare multiple metals, such as combinations among these metals, highly dispersed and anchored on the carbon materials in one time. As a representative, the as‐prepared Fe‐NC (denoted as FeNC HM in context) is investigated in detail as catalyst for ORR and Zn‐air battery applications. The authors envision that the method of HMCS provides a good support of surface engineering for preparation of metals sites containing carbon at large scale.
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