Tunable intrinsic strain in two-dimensional transition metal electrocatalysts

作者：Lei Wang, Zhenhua Zeng, Wenpei Gao, Tristan Maxson, David Raciti, Michael Giroux, Xiaoqing Pan, Chao Wang, Jeffrey Greeley · 发表于：Science · 年份：2019 · DOI：10.1126/science.aat8051 · 被引用次数：595 · 研究领域：Electrocatalysts for Energy Conversion、Molecular Junctions and Nanostructures、Semiconductor materials and devices

Harnessing self-tuned strain Strain can modify the electronic properties of a metal and has provided a method for enhancing electrocatalytic activity. For practical catalysts, nanomaterials with high surface areas are needed. However, for nanoparticles, strain is often induced with overlayers (adsorbates or heteroatoms) that can undergo reconstruction during operation that releases the induced strain. Wang et al. show that freestanding palladium nanosheets (three to five monolayers thick) form with an internal compressive strain of 1 to 2% and can be much more active for both the oxygen and hydrogen evolution reactions under alkaline conditions compared with nanoparticles. Science , this issue p. 870