NiCo2O4/graphene quantum dots (GQDs) for use in efficient electrochemical energy devices: An electrochemical and X-ray absorption spectroscopic investigation
學年 108
學期 2
出版（發表）日期 2020-05-15
作品名稱 NiCo2O4/graphene quantum dots (GQDs) for use in efficient electrochemical energy devices: An electrochemical and X-ray absorption spectroscopic investigation
作品名稱（其他語言）
著者 Han-Wei Chang; Ji-Xuan Fu; Yu-Cheng Huang; Ying-Rui Lu; Chun-Hong Kuo; Jeng-Lung Chen; Chi-Liang Chen; Jyh-Fu Lee; Jin-Ming Chene; Yu-Chen Tsai; Wu Ching Chou; Chung-Li Dong
單位
出版者
著錄名稱、卷期、頁數 Catalysis Today 348, p.290-298
摘要 NiCo2O4/graphene quantum dots (GQDs) were synthesized by the incorporation of GQDs into NiCo2O4 as electrode materials for use in electrochemical energy devices. The electronic structure and the electrochemical performance of NiCo2O4/GQDs were investigated by X-ray absorption spectroscopy (XAS) and electrochemical measurements. The rich redox active sites were revealed on the NiCo2O4/GQDs, which were formed by the strong Csingle bondOsingle bondNi/Co interaction between NiCo2O4 and GQDs. The synergetic double-layer capacitive and pseudo-capacitive properties were suggested to provide favorable electrochemical characteristics. In/ex situ XAS elucidates local electronic and chemical environments and provides insights into the energy storage/conversion mechanisms. Analytical results demonstrate that the NiCo2O4/GQDs have strong oxygen-carbon bridges and have more Ni active sites than does NiCo2O4, favoring metal-to-ligand charge transfer at the interface between NiCo2O4 and GQDs, critically influencing electrochemical performance. This work contributes importantly to the field by elucidating an energy storage/conversion mechanism for electrochemical energy devices.
關鍵字 NiCo2O4;Graphene quantum dots;X-ray absorption spectroscopy
語言 en_US
ISSN 1873-4308
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 USA
公開徵稿
出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/120670 )