Deng Shikai, Zhang Bowei, Choo Priscilla, Smeets Paul J M, Odom Teri W
Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.
NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States.
Nano Lett. 2021 Feb 10;21(3):1523-1529. doi: 10.1021/acs.nanolett.0c05029. Epub 2021 Jan 28.
This paper reports that strongly coupled bimetallic core-shell nanoparticle arrays show photoelectrocatalytic activity for hydrogen evolution reactions (HER). We fabricated large-area Cu-Pt nanoparticle lattices by combining top-down lithography and solution-based chemistry. These coupled lattices support two different types of plasmon modes, localized surface plasmons from individual particles and surface lattice resonances (SLRs) from the 2D lattice, that increased HER catalytic activity under white-light illumination up to 60%. Comparing photoelectrocatalytic performances of the two plasmon modes at different wavelength ranges, we found that SLRs had two-fold activity enhancement over that from localized surface plasmons.
本文报道，强耦合双金属核壳纳米颗粒阵列对析氢反应（HER）表现出光电催化活性。我们通过结合自上而下的光刻技术和基于溶液的化学方法制备了大面积的铜-铂纳米颗粒晶格。这些耦合晶格支持两种不同类型的等离子体模式，即单个颗粒的局域表面等离子体和二维晶格的表面晶格共振（SLR），在白光照射下，它们将HER催化活性提高了60%。通过比较两种等离子体模式在不同波长范围内的光电催化性能，我们发现表面晶格共振的活性比局域表面等离子体增强了两倍。
