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Yin G, Zhang C, Liu Y, Sun Y, Qi X. Modulation of Photocatalytic CO 2 Reduction by n- p Codoping Engineering of Single-Atom Catalysts. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1183. [PMID: 39057859 PMCID: PMC11280387 DOI: 10.3390/nano14141183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 07/04/2024] [Accepted: 07/09/2024] [Indexed: 07/28/2024]
Abstract
Transition metal (TM) single-atom catalysts (SACs) have been widely applied in photocatalytic CO2 reduction. In this work, n-p codoping engineering is introduced to account for the modulation of photocatalytic CO2 reduction on a two-dimensional (2D) bismuth-oxyhalide-based cathode by using first-principles calculation. n-p codoping is established via the Coulomb interactions between the negatively charged TM SACs and the positively charged Cl vacancy (VCl) in the dopant-defect pairs. Based on the formation energy of charged defects, neutral dopant-defect pairs for the Fe, Co, and Ni SACs (PTM0) and the -1e charge state of the Cu SAC-based pair (PCu-1) are stable. The electrostatic attraction of the n-p codoping strengthens the stability and solubility of TM SACs by neutralizing the oppositely charged VCl defect and TM dopant. The n-p codoping stabilizes the electron accumulation around the TM SACs. Accumulated electrons modify the d-orbital alignment and shift the d-band center toward the Fermi level, enhancing the reducing capacity of TM SACs based on the d-band theory. Besides the electrostatic attraction of the n-p codoping, the PCu-1 also accumulates additional electrons surrounding Cu SACs and forms a half-occupied dx2-y2 state, which further upshifts the d-band center and improves photocatalytic CO2 reduction. The metastability of Cl multivacancies limits the concentration of the n-p pairs with Cl multivacancies (PTM@nCl (n > 1)). Positively charged centers around the PTM@nCl (n > 1) hinders the CO2 reduction by shielding the charge transfer to the CO2 molecule.
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Affiliation(s)
- Guowei Yin
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China
| | - Chunxiao Zhang
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China
- Hunan Key Laboratory of Micro-Nano Energy Materials and Devices, Xiangtan University, Xiangtan 411105, China
| | - Yundan Liu
- Hunan Key Laboratory of Micro-Nano Energy Materials and Devices, Xiangtan University, Xiangtan 411105, China
| | - Yuping Sun
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China
| | - Xiang Qi
- Hunan Key Laboratory of Micro-Nano Energy Materials and Devices, Xiangtan University, Xiangtan 411105, China
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Li J, Zhang L, Gao S, Chen X, Wu R, Wang X, Wang Q. N-doped carbon nanocage-anchored bismuth atoms for efficient CO 2 reduction. Chem Commun (Camb) 2023; 59:11991-11994. [PMID: 37727123 DOI: 10.1039/d3cc02806b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Electrochemical CO2 reduction (CO2RR) is a prospective but challenging method to decrease the CO2 concentration in the current atmosphere; in particular, the poor selectivity of the target product CO and large overpotentials limit its efficiency. Herein, we propose a top-down route to synthesize Bi single atoms (SAs) anchored by N-doped carbon (NCbox) nanoboxes starting from BiOCl nanoplates as the hard templates. In the CO2RR, the obtained Bi single-atom catalyst possesses remarkably-enhanced catalytic performance, achieving a maximal Faraday efficiency (FE) of 91.7% at -0.6 V, which is much higher than that of NCbox-supported Bi nanoparticles (NPs). Further investigations point out that the enhancement can be attributed to the unique coordination structure of the Bi SAs, as well as the fascinating properties of NCbox that can efficiently promote the electron transfer during the electro-catalysis.
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Affiliation(s)
- Jiayi Li
- Department of Chemistry and College of Elementary Education, Capital Normal University, Beijing 100048, China.
| | - Lingling Zhang
- State Key Laboratory of Rare Earth Resource Utilization, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Changchun 130022, China.
| | - Shuai Gao
- Department of Chemistry and College of Elementary Education, Capital Normal University, Beijing 100048, China.
| | - Xingmin Chen
- College of Environmental Sciences and Engineering, Nankai University, Tianjin 300350, China
| | - Runjie Wu
- Department of Chemistry and College of Elementary Education, Capital Normal University, Beijing 100048, China.
| | - Xiao Wang
- State Key Laboratory of Rare Earth Resource Utilization, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Changchun 130022, China.
| | - Qiang Wang
- Department of Chemistry and College of Elementary Education, Capital Normal University, Beijing 100048, China.
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Guan X, Zhang X, Zhang C, Li R, Liu J, Wang Y, Wang Y, Fan C, Li Z. Original self-assembled S-scheme BiOBr-(001)/Bi 2SiO 5/Bi heterojunction photocatalyst with rich oxygen vacancy for boosting CO 2 reduction performance. J Colloid Interface Sci 2023; 644:426-436. [PMID: 37126892 DOI: 10.1016/j.jcis.2023.04.097] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 04/13/2023] [Accepted: 04/21/2023] [Indexed: 05/03/2023]
Abstract
Photocatalysis CO2 reduction into high-value-added chemical feedstocks is desirable for simultaneously addressing the solar energy storage, CO2 excess and energy shortage issues. In this work, a kind of original S-scheme BiOBr-(001)/Bi2SiO5/Bi (OSB) heterostructure photocatalyst with rich oxygen vacancies is in-situ synthesized, which significantly promotes the photocatalytic CO2 reduction performance. Interestingly, the lower formation energy of oxygen vacancy exhibits the easy feasibility on the BiOBr-(001) surface via the assistant of ultrasound. There exists the highest photocatalytic CO2 reduction activity to CO of 234.05 μmol g-1h-1 for OSB-20 sample (ultrasound time: 20 min), higher 3.3 times than OSB-0 sample (without ultrasound). Combined with experimental and calculated results, the significative formation mechanism, widened light-response range, highly-efficient separation/transfer paths and improved redox-reduction abilities of photogenerated electron-hole pairs for S-scheme OSB-20 heterostructure are investigated and proposed. Our findings provide new insights for the construction and synthesis of the S-scheme Bi-based heterojunction photocatalyst system.
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Affiliation(s)
- Xiushuai Guan
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, P.R. China; College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China
| | - Xiaochao Zhang
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, P.R. China; College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China.
| | - Changming Zhang
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, P.R. China
| | - Rui Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Jianxin Liu
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China
| | - Yunfang Wang
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China
| | - Yawen Wang
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China
| | - Caimei Fan
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China
| | - Zhong Li
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, P.R. China; College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China.
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Anisotropic Charge Transfer Mobility Properties of Systems with Large Conjugation Core and Peripheral Phenyl Rings. J CLUST SCI 2022. [DOI: 10.1007/s10876-022-02307-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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