Synergy of ultrathin CoOx overlayer and nickel single atoms on hematite nanorods for efficient photoelectrochemical water splitting
學年 111
學期 2
出版（發表）日期 2023-02-15
作品名稱 Synergy of ultrathin CoOx overlayer and nickel single atoms on hematite nanorods for efficient photoelectrochemical water splitting
作品名稱（其他語言）
著者 Lianlian Mao, Yu-Cheng Huang, Hao Deng, Fanqi Meng, Yanming Fu, Yiqing Wang, Mingtao Li, Qinghua Zhang, Chung-Li Dong, Lin Gu, Shaohua Shen
單位
出版者
著錄名稱、卷期、頁數 Small 19(7), 2203838
摘要 To solve surface carrier recombination and sluggish water oxidation kinetics of hematite (α-Fe2O3) photoanodes, herein, an attractive surface modification strategy is developed to successively deposit ultrathin CoOx overlayer and Ni single atoms on titanium (Ti)-doped α-Fe2O3 (Ti:Fe2O3) nanorods through a two-step atomic layer deposition (ALD) and photodeposition process. The collaborative decoration of ultrathin CoOx overlayer and Ni single atoms can trigger a big boost in photo-electrochemical (PEC) performance for water splitting over the obtained Ti:Fe2O3/CoOx/Ni photoanode, with the photocurrent density reaching 1.05 mA cm−2 at 1.23 V vs. reversible hydrogen electrode (RHE), more than three times that of Ti:Fe2O3 (0.326 mA cm−2). Electrochemical and electronic investigations reveal that the surface passivation effect of ultrathin CoOx overlayer can reduce surface carrier recombination, while the catalysis effect of Ni single atoms can accelerate water oxidation kinetics. Moreover, theoretical calculations evidence that the synergy of ultrathin CoOx overlayer and Ni single atoms can lower the adsorption free energy of OH* intermediates and relieve the potential-determining step (PDS) for oxygen evolution reaction (OER). This work provides an exemplary modification through rational engineering of surface electrochemical and electronic properties for the improved PEC performances, which can be applied in other metal oxide semiconductors as well.
關鍵字
語言 en
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 否
國別 DEU
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/125729 )