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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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