期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 278, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119269
关键词
Au@Rh core-shell nanowire; Hydrazine oxidation reaction; Electronic effect; Photothermal effect; Photoelectric effect
资金
- National Natural Science Foundation of China [21875133, 51873100]
- Natural Science Foundation of Shaanxi Province [2020JZ-23]
- Fundamental Research Funds for the Central Universities [GK201901002, 2018CSLZ010, 2019TS007]
Optimizing morphology, structure, and composition of noble metal bimetallic nanomaterials not only enhances their electroactivity and stability but also expands their scope of application. In this work, ultrafine bimetallic Au@Rh core-shell nanowires (Au@Rh ultra-NWs) are synthesized by simple wet chemical strategy using ultrafine Au nanowires (Au ultra-NWs) with 5.50 nm diameter as substrate and explore their potential application for hydrazine electro-oxidation reaction (HeOR) in an alkaline solution. Experimental and calculational results demonstrate that bimetallic Au@Rh ultra-NWs with optimal component reveal 13.6-fold Rh-mass activity enhancement for HeOR at 0.4 V potential relative to commercial Rh nanocrystals (Rh c-NCs), which can be ascribed to the ultrathin Rh shell thickness and the electronic effect caused by the interaction between Au core and Rh shell. Under light irradiation conditions, bimetallic Au@Rh ultra-NWs further show plasmon-promoted HeOR activity, which originates from photoelectric and photothermal effects caused by localized surface plasmon resonance of Au ultra-NWs core.
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