1
|
Wang D, Jung HD, Liu S, Chen J, Yang H, He Q, Xi S, Back S, Wang L. Revealing the structural evolution of CuAg composites during electrochemical carbon monoxide reduction. Nat Commun 2024; 15:4692. [PMID: 38824127 PMCID: PMC11144262 DOI: 10.1038/s41467-024-49158-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Accepted: 05/23/2024] [Indexed: 06/03/2024] Open
Abstract
Comprehending the catalyst structural evolution during the electrocatalytic process is crucial for establishing robust structure/performance correlations for future catalysts design. Herein, we interrogate the structural evolution of a promising Cu-Ag oxide catalyst precursor during electrochemical carbon monoxide reduction. By using extensive in situ and ex situ characterization techniques, we reveal that the homogenous oxide precursors undergo a transformation to a bimetallic composite consisting of small Ag nanoparticles enveloped by thin layers of amorphous Cu. We believe that the amorphous Cu layer with undercoordinated nature is responsible for the enhanced catalytic performance of the current catalyst composite. By tuning the Cu/Ag ratio in the oxide precursor, we find that increasing the Ag concentration greatly promotes liquid products formation while suppressing the byproduct hydrogen. CO2/CO co-feeding electrolysis and isotopic labelling experiments suggest that high CO concentrations in the feed favor the formation of multi-carbon products. Overall, we anticipate the insights obtained for Cu-Ag bimetallic systems for CO electroreduction in this study may guide future catalyst design with improved performance.
Collapse
Affiliation(s)
- Di Wang
- Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore
| | - Hyun Dong Jung
- Department of Chemical and Biomolecular Engineering, Institute of Emergent Materials, Sogang University, Seoul, Republic of Korea
| | - Shikai Liu
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore
| | - Jiayi Chen
- Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore
| | - Haozhou Yang
- Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore
| | - Qian He
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore.
| | - Shibo Xi
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.
| | - Seoin Back
- Department of Chemical and Biomolecular Engineering, Institute of Emergent Materials, Sogang University, Seoul, Republic of Korea.
| | - Lei Wang
- Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, Singapore, Singapore.
- Centre for Hydrogen Innovations, National University of Singapore, Singapore, Singapore.
| |
Collapse
|
2
|
Liu Z, Ren X, Duan X, Sarmah AK, Zhao X. Remediation of environmentally persistent organic pollutants (POPs) by persulfates oxidation system (PS): A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 863:160818. [PMID: 36502984 DOI: 10.1016/j.scitotenv.2022.160818] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 11/17/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Over the past few years, persistent organic pollutants (POPs) exhibiting high ecotoxicity have been widely detected in the environment. Persulfate-oxidation hybrid system is one of the most widely used novel advanced oxidation techniques and is based on the persulfate generation of SO4-∙ and ∙OH from persulfate to degrade POPs. The overarching aim of this work is to provide a critical review of the variety of methods of peroxide activation (e.g., light activated persulfate, heat-activated persulfate, ultrasound-activated persulfate, electrochemically-activated persulfate, base-activated persulfate, transition metal activated persulfate, as well as Carbon based material activated persulfate). Specifically, through this article we make an attempt to provide the important characteristics and uses of main activated PS methods, as well as the prevailing mechanisms of activated PS to degrade organic pollutants in water. Finally, the advantages and disadvantages of each activation method are analyzed. This work clearly illustrates the benefits of different persulfate activation technologies, and explores persulfate activation in terms of Sustainable Development Goals, technical feasibility, toxicity assessment, and economics to facilitate the large-scale application of persulfate technologies. It also discusses how to choose the most suitable activation method to degrade different types of POPs, filling the research gap in this area and providing better guidance for future research and engineering applications of persulfates.
Collapse
Affiliation(s)
- Zhibo Liu
- College of Environmental Science and Engineering, Jilin Normal University, Haifeng Street, Tiexi Dist, Siping 136000, China
| | - Xin Ren
- College of Environmental Science and Engineering, Jilin Normal University, Haifeng Street, Tiexi Dist, Siping 136000, China; Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Siping 136000, China
| | - Xiaoyue Duan
- College of Environmental Science and Engineering, Jilin Normal University, Haifeng Street, Tiexi Dist, Siping 136000, China
| | - Ajit K Sarmah
- The Department of Civil & Environmental Engineering, Faculty of Engineering, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
| | - Xuesong Zhao
- College of Environmental Science and Engineering, Jilin Normal University, Haifeng Street, Tiexi Dist, Siping 136000, China; Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Siping 136000, China.
| |
Collapse
|
3
|
Mn2O3@Mn5O8 as an efficient catalyst for the degradation of organic contaminants in aqueous media through sulfite activation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
4
|
Yu Y, Wang D, Hong Y, Zhang T, Liu C, Chen J, Qin G, Li S. Bulk-immiscible CuAg alloy nanorods prepared by phase transition from oxides for electrochemical CO 2 reduction. Chem Commun (Camb) 2022; 58:11163-11166. [PMID: 36111512 DOI: 10.1039/d2cc04789f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Combining Cu and Ag in an alloy state holds promise to serve as a tandem catalyst for electrocatalytic CO2 reduction, but is restricted by immiscibility in the bulk. Here, a far-from-equilibrium method is developed to synthesize CuAg alloy by electroreduction of Cu2Ag2O3 under a large cathodic overpotential. The alloy state of CuAg is conducive to the formation of C2+ molecules. A high formation rate of C2H4 of 159.8 μmol cm-2 h-1 is reached on the CuAg alloy nanorods, 2.3 times higher than that on pure Cu.
Collapse
Affiliation(s)
- Yihong Yu
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China.
| | - Di Wang
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China.
| | - Yimeng Hong
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China.
| | - Teng Zhang
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China.
| | - Chuangwei Liu
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China.
| | - Jing Chen
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Gaowu Qin
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China.
| | - Song Li
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China. .,Institute for Frontier Technologies of Low-Carbon Steelmaking, Northeastern University, Shenyang, 110819, China
| |
Collapse
|