Citation: Xu Zhou, Chunyan Wang, Fulin Liu, Chengyu He, Shiming Zhang. Insight into the improvement mechanism of Co−Pi-modified hematite nanowire photoanodes for solar water oxidation^☆[J]. Chinese Chemical Letters, ;2021, 32(10): 3261-3263. doi: 10.1016/j.cclet.2021.05.015 shu

Insight into the improvement mechanism of Co−Pi-modified hematite nanowire photoanodes for solar water oxidation^☆

Xu Zhou ^a ,
Chunyan Wang ^a ,
Fulin Liu ^a ,
Chengyu He ^{a, *,} ,
Shiming Zhang ^{a, b, *,}

a.
Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 211816, China
b.
Jiangsu Seenbom Flexible Electronics Institute Co., Ltd., Nanjing 210061, China

^☆

^th

iamcyhe@njtech.edu.cn

iamsmzhang@njtech.edu.cn

Received Date: 26 August 2020
Revised Date: 10 February 2021
Accepted Date: 14 May 2021
Available Online: 19 May 2021

Figures(4)

The composite photoanodes composed by cobalt phosphate catalyst (Co−Pi) modified semiconductor have been widely used for solar water splitting, but the improvement mechanism has not been experimentally confirmed. Here we use transient photoelectrochemical measurements and impedance spectroscopy to investigate the effect of Co−Pi catalyst on hematite nanowire photoanode. It is found that under illumination the Co−Pi catalyst can efficiently promote the transfer of photo-generated holes to the Co−Pi layer by increasing the electrical conductivity of the composite structure under a low potential. The Co−Pi catalyst can recombine with photo-generated electrons to reduce the surface recombination efficiency of photo-generated holes and electrons under a high potential. These results provide important new understanding of the performance improvement mechanism for the Co−Pi-modified semiconductor nanowire composite photoanodes.
- Semiconductor nanowires,
- Oxygen-evolving catalyst,
- Composite structure,
- Water oxidation mechanism
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Insight into the improvement mechanism of Co−Pi-modified hematite nanowire photoanodes for solar water oxidation☆

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通讯作者: 陈斌, bchen63@163.com

Insight into the improvement mechanism of Co−Pi-modified hematite nanowire photoanodes for solar water oxidation^☆