Template‐Directed Rapid Synthesis of Pd‐Based Ultrathin Porous Intermetallic Nanosheets for Efficient Oxygen Reduction

作者：Jingchun Guo, Lei Gao, Xin Tan, Yuliang Yuan, Jeonghyeon Kim, Yu Wang, Hui Wang, Y. J. Zeng, Sang‐Il Choi, Sean C. Smith, Hongwen Huang · 发表于：Angewandte Chemie International Edition · 年份：2021 · DOI：10.1002/anie.202100307 · 被引用次数：175 · 研究领域：Electrocatalysts for Energy Conversion、Fuel Cells and Related Materials、Catalytic Processes in Materials Science

Abstract Atomically ordered intermetallic nanoparticles exhibit improved catalytic activity and durability relative to random alloy counterparts. However, conventional methods with time‐consuming and high‐temperature syntheses only have rudimentary capability in controlling the structure of intermetallic nanoparticles, hindering advances of intermetallic nanocatalysts. We report a template‐directed strategy for rapid synthesis of Pd‐based (PdM, M=Pb, Sn and Cd) ultrathin porous intermetallic nanosheets (UPINs) with tunable sizes. This strategy uses preformed seeds, which act as the template to control the deposition of foreign atoms and the subsequent interatomic diffusion. Using the oxygen reduction reaction (ORR) as a model reaction, the as‐synthesized Pd 3 Pb UPINs exhibit superior activity, durability, and methanol tolerance. The favored geometrical structure and interatomic interaction between Pd and Pb in Pd 3 Pb UPINs are concluded to account for the enhanced ORR performance.