材料科学
纳米材料
催化作用
位错
纳米颗粒
纳米技术
化学物理
化学工程
复合材料
生物化学
物理
工程类
化学
作者
Siliang Liu,Yi Shen,Yang Zhang,Baihua Cui,Shibo Xi,Jinfeng Zhang,Lianyong Xu,Shuze Zhu,Yanan Chen,Yida Deng,Wenbin Hu
标识
DOI:10.1002/adma.202106973
摘要
Crystal structure engineering of nanomaterials is crucial for the design of electrocatalysts. Inducing dislocations is an efficient approach to generate strain effects in nanomaterials to optimize the crystal and electronic structures and improve the catalytic properties. However, it is almost impossible to produce and retain dislocations in commercial mainstream catalysts, such as single metal platinum (Pt) catalysts. In this work, a non-equilibrium high-temperature (>1400 K) thermal-shock method is reported to induce rich dislocations in Pt nanocrystals (Dr-Pt). The method is performed in an extreme environment (≈77 K) created by liquid nitrogen. The dislocations induced within milliseconds by thermal and structural stress during the crystallization process are kinetically frozen at an ultrafast cooling rate. The high-energy surface structures with dislocation-induced strain effects can prevent surface restructuring during catalysis. The findings indicate that a novel extreme environmental high-temperature thermal-shock method can successfully introduce rich dislocations in Pt nanoparticles and significantly boost its hydrogen evolution reaction performance.
科研通智能强力驱动
Strongly Powered by AbleSci AI