电催化剂
纳米片
材料科学
纳米颗粒
异质结
等离子体子
纳米技术
钯
析氧
表面等离子共振
过电位
电化学
光电子学
催化作用
化学
电极
物理化学
生物化学
作者
Jianwei Ding,Fengmei Wang,Feng Pan,Peng Yu,Ning Gao,Randall H. Goldsmith,Shuangfei Cai,Rong Yang,Jun He
出处
期刊:ACS Catalysis
日期:2021-10-28
卷期号:11 (21): 13721-13732
被引量:22
标识
DOI:10.1021/acscatal.1c03811
摘要
Plasmon-enhanced electrocatalysis holds great promise for converting solar energy into chemical energy by efficiently harvesting photons for electrocatalytic reactions. Here, we report a unique two-dimensional (2D) "Egg Waffle"-like heterostructure, i.e., gold nanoparticles intercalated in a palladium nanosheet (AuNP-in-PdNS), effectively interfacing Au NPs with 2D Pd for greatly enhancing electrocatalytic activity under light illumination. A considerable electrocatalytic enhancement, i.e., a small overpotential of 19 mV (i.e., 4-fold decrease) at a current density of 10 mA cm–2 for the hydrogen evolution reaction and an improved oxygen reduction reaction with a half-wave potential of 0.882 V, is achieved on the 2D AuNP-in-PdNS heterostructure due to excitation of the localized surface plasmon resonance (LSPR). The unique heterostructure and strongly enhanced localized field intensity under LSPR excitation could result in hot electrons concentrated on the surface of Pd NSs and direct transfer of plasmonic energy to metal–adsorbate complexes, manifesting as a reduction of the apparent activation barrier in the electrocatalysis. This study provides insight into both the design of efficient electrocatalysts and the distinct role of LSPR excitation in plasmon-enhanced electrocatalysis.
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