|
1
|
Zhang K, Wu Q, Ba K, Qiu Q, Yang Y, Lin Y, Wang D, Xie T. Investigation of charge dynamics in dinuclear cobalt phthalocyanine ammonium sulfonate (PDS) modified Ti-Fe 2O 3 photoanodes for photoelectrochemical water oxidation. J Colloid Interface Sci 2023; 650:1022-1031. [PMID: 37459726 DOI: 10.1016/j.jcis.2023.07.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/30/2023] [Accepted: 07/06/2023] [Indexed: 08/17/2023]
Abstract
The kinetic competition between water oxidation/electron extraction processes and recombination behaviors is a key consideration in the development of efficient photoanodes for solar-driven water splitting. Investigating the photogenerated charge behaviors could guide the construction of high-efficiency photoanodes. In this study, the charge carrier kinetics involved in photoelectrochemical water oxidation of PDS/Ti-Fe2O3 were analyzed using surface photovoltage (SPV), transient photovoltage (TPV), short-pulse transient photocurrent (TPC) and photoelectrochemical impedance spectra (PEIS). The TPC results indicate the interfacial electric field introduced by the PDS loading increases the electron extraction and suppresses the bulk recombination, enhancing the spatial separation of photogenerated charges, which is consistent with the SPV and TPV results. Besides, the surface recombination of the back electron (BER) is also attenuated, which enhances the long-lived holes at the surface of PDS/Ti-Fe2O3 photoanode. Similarly, as obtained by PEIS fitting, the loading of PDS accelerates holes transfer at the photoanode/electrolyte interface, and increases the utilization of long-lived holes. In other word, the recombination behaviors of photogenerated charges are restrained both in the bulk and surface of the photoanode after the deposition of PDS, leading to enhanced PEC performance. These findings highlight the importance of understanding charge carrier dynamics in the design of high-efficient photoanodes.
Collapse
Affiliation(s)
- Kai Zhang
- College of Chemistry, Jilin University, No. 2699, Qianjin Street, Changchun 130012, PR China
| | - Qiannan Wu
- College of Chemistry, Jilin University, No. 2699, Qianjin Street, Changchun 130012, PR China
| | - Kaikai Ba
- College of Chemistry, Jilin University, No. 2699, Qianjin Street, Changchun 130012, PR China
| | - Qingqing Qiu
- College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, PR China
| | - Youzhi Yang
- College of Chemistry, Jilin University, No. 2699, Qianjin Street, Changchun 130012, PR China
| | - Yanhong Lin
- College of Chemistry, Jilin University, No. 2699, Qianjin Street, Changchun 130012, PR China
| | - Dejun Wang
- College of Chemistry, Jilin University, No. 2699, Qianjin Street, Changchun 130012, PR China
| | - Tengfeng Xie
- College of Chemistry, Jilin University, No. 2699, Qianjin Street, Changchun 130012, PR China.
| |
Collapse
|
|
2
|
Ba K, Li Y, Liu Y, Lin Y, Wang D, Xie T, Li J. Interface designing of efficient Z-scheme Ti-ZnFe 2O 4/In 2O 3 photoanode toward boosting photoelectrochemical water oxidation. J Colloid Interface Sci 2023; 649:492-500. [PMID: 37356150 DOI: 10.1016/j.jcis.2023.06.100] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 05/31/2023] [Accepted: 06/15/2023] [Indexed: 06/27/2023]
Abstract
Ti-ZnFe2O4 photoanode has attracted extensive attention in photoelectrochemical (PEC) water oxidation due to its narrow band gap and good photostability. However, its low efficiency limits its development. Herein, we designed and constructed direct Z-scheme Ti-ZnFe2O4/In2O3 (Ti-ZFO/In2O3) photoanode. Under the interface electric field, photogenerated holes with stronger oxidation capacity on In2O3 are retained to participate in the water oxidation reaction, and the photocurrent density of Ti-ZFO/In2O3 is much higher than that of pure Ti-ZFO, reaching 2.2 mA/cm2 at 1.23 V vs. RHE. Kelvin Probe, steady-state photovoltage spectroscopy (SPV), transient photovoltage spectroscopy (TPV) and in-situ double beam strategy were used to demonstrate the Z-scheme charge transfer mechanism of Ti-ZFO/In2O3 photoanode. Our work provides an effective scheme and technical means for further understanding the mechanism of interfacial charge transfer.
Collapse
Affiliation(s)
- Kaikai Ba
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Yinyin Li
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Yunan Liu
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Yanhong Lin
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Dejun Wang
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Tengfeng Xie
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China.
| | - Jun Li
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China.
| |
Collapse
|
|
3
|
Wu Q, Liang X, Chen H, Yang L, Xie T, Zou X. Surface-oxidized titanium diboride as cocatalyst on hematite photoanode for solar water splitting. CrystEngComm 2022. [DOI: 10.1039/d2ce00122e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The PEC performance of α-Fe2O3/SO-TiB2 is attributed to the enhancement of photogenerated charge separation and injection efficiency under the driving force of the interfacial electric field.
Collapse
Affiliation(s)
- Qiannan Wu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Xiao Liang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Hui Chen
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Lan Yang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Tengfeng Xie
- College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Xiaoxin Zou
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| |
Collapse
|
|
4
|
Liang Z, Chen Y, Zhang R, Zhang K, Ba K, Lin Y, Wang D, Xie T. Engineering the synthesized colloidal CuInS 2 passivation layer in interface modification for CdS/CdSe quantum dot solar cells. Dalton Trans 2022; 51:17292-17300. [DOI: 10.1039/d2dt02555h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Developing a colloidal CuInS2 passivation layer for modifying the CdS/CdSe interface to suppress charge recombination for the first time.
Collapse
Affiliation(s)
- Zhijun Liang
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yifan Chen
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Rui Zhang
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Kai Zhang
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Kaikai Ba
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yanhong Lin
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Dejun Wang
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Tengfeng Xie
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| |
Collapse
|