期刊論文

學年 112
學期 2
出版（發表）日期 2024-06-26
作品名稱 Novel heterostructure-based CoFe and cobalt oxysulfide nanocubes for effective bifunctional electrocatalytic water and urea oxidation
作品名稱（其他語言）
著者 Athibala Mariappan; Pandian Mannu; Kugalur Shanmugam Ranjith; Ta Thi Thuy Nga; Young-Kyu Han; Chung-Li Dong; Ranjith Kumar Dharman; Tae Hwan Oh
單位
出版者
著錄名稱、卷期、頁數 Small 20(26), 2310112
摘要 The development of effective oxygen evolution reaction (OER) and urea oxidation reaction (UOR) on heterostructure electrocatalysts with specific interfaces and characteristics provides a distinctive character. In this study, heterostructure nanocubes (NCs) comprising inner cobalt oxysulfide (CoOS) NCs and outer CoFe (CF) layered double hydroxide (LDH) are developed using a hydrothermal methodology. During the sulfidation process, the divalent sulfur ions (S2−) are released from the breakdown of the sulfur source and react with the Co-precursors on the surface leading to the transformation of CoOH nanorods into CoOS nanocubes. Further, X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) analyses reveal that the interactions at the interface of the CF@CoOS NCs significantly altered the electronic structure, thus enhancing the electrocatalytic performance. The optimal catalysts exhibited effective OER and UOR activities, the attained potentials are 1.51 and 1.36 V. This remarkable performance is attributable to the induction of electron transfer from the CoFe LDH to CoOS, which reduces the energy barrier of the intermediates for the OER and UOR. Furthermore, an alkaline water and urea two-cell electrolyzer assembled using CF@CoOS-2 NCs and Pt/C as the anode and cathode requires a cell voltage of 1.63 and 1.56 V along with a durability performance.
關鍵字
語言 en_US
ISSN 1613-6810; 1613-6829
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 DEU
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/127601 )