光电流
氧化锡
纳米片
分解水
化学
赤铁矿
纳米棒
覆盖层
基质(水族馆)
化学工程
氧化物
电解质
纳米技术
光催化
催化作用
光电子学
电极
材料科学
矿物学
生物化学
有机化学
物理化学
地质学
工程类
海洋学
作者
Yuting Zheng,Penglong Wang,Shuai Zhu,Ming-Wei Wu,Ling Zhang,Caixia Feng,Deliang Li,Zhixian Chang,Ruifeng Chong
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2024-01-19
卷期号:63 (5): 2745-2755
被引量:9
标识
DOI:10.1021/acs.inorgchem.3c04129
摘要
Hematite (α-Fe2O3) photoanode is a promising candidate for efficient PEC solar energy conversion. However, the serious charge recombination together with the sluggish water oxidation kinetics of α-Fe2O3 still restricts its practical application in renewable energy systems. In this work, a CoOOH/α-Fe2O3/SnO2 photoanode was fabricated, in which the ultrathin SnO2 underlayer is deposited on the fluorine-doped tin oxide (FTO) substrate, α-Fe2O3 nanorod array is the absorber layer, and CoOOH nanosheet is the surface modifier, respectively. The resulting CoOOH/α-Fe2O3/SnO2 exhibited excellent PEC water splitting with a high photocurrent density of 2.05 mA cm–2 at 1.23 V vs RHE in the alkaline electrolyte, which is ca. 3.25 times that of bare α-Fe2O3. PEC characterizations demonstrated that SnO2 not only could block hole transport from α-Fe2O3 to FTO substrate but also could efficiently enhance the light-harvesting property and reduce the surface states by controlling the growth process of α-Fe2O3, while the CoOOH overlayer as cocatalysts could rapidly extract the photogenerated holes and provide catalytic active sites for water oxidation. Benefiting from the synergistic effects of SnO2 and CoOOH, the efficiency of the charge recombination and the overpotential for water oxidation of α-Fe2O3 are obviously decreased, resulting in the boosted PEC efficiency for water oxidation. The rational design and simple fabrication strategy display great potentials to be used for other PEC systems with excellent efficiency.
科研通智能强力驱动
Strongly Powered by AbleSci AI