The localized surface plasmon resonance (LSPR) effect has been widely utilized in photocatalysis, but most reported LSPR materials are based on noble metals of gold or silver with high chemical stability. Plasmonic copper nanoparticles that exhibit an LSPR absorbance at 600 nm are promising for many applications, such as photocatalysis. Unfortunately, plasmonic copper nanoparticles are affected by serious surface oxidation in air. Herein, a novel lollipop‐shaped Cu@Cu₂O/ZnO heterojunction nanostructure was designed, for the first time, to stabilize the plasmonic Cu core by decorating Cu@Cu₂O core–shell structures with ZnO nanorods. This Cu@Cu₂O/ZnO nanostructure exhibited significantly enhanced stability than that of regular Cu@Cu₂O, which accounted for the remarkably enhanced photocatalytic H₂ evolution rate through water splitting, relative to pristine ZnO nanorods, over an extended wavelength range due to the plasmonic Cu core.

中文翻译：

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稳定的等离子Cu @ Cu2O / ZnO异质结增强了光催化氢的产生

局部表面等离振子共振（LSPR）效应已广泛用于光催化中，但是大多数报道的LSPR材料基于具有高化学稳定性的金或银的贵金属。在600 nm处表现出LSPR吸光度的等离子铜纳米粒子对于许多应用（例如光催化）很有希望。不幸的是，等离子体铜纳米颗粒会受到空气中严重表面氧化的影响。本文中，首次设计了一种新颖的棒棒糖形Cu @ Cu ₂ O / ZnO异质结纳米结构，通过用ZnO纳米棒修饰Cu @ Cu ₂ O核-壳结构来稳定等离激元Cu核。这种Cu @ Cu ₂ O / ZnO纳米结构的稳定性显着高于常规Cu @ Cu ₂相对于原始的ZnO纳米棒，由于等离激元的Cu核，在较宽的波长范围内，通过水分解，O的光催化H ₂放出速率显着提高。