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Shan W, Liu R, Zhao H, He Z, Lai Y, Li S, He G, Liu J. In Situ Surface-Enhanced Raman Spectroscopic Evidence on the Origin of Selectivity in CO 2 Electrocatalytic Reduction. ACS Nano 2020; 14:11363-11372. [PMID: 32790343 DOI: 10.1021/acsnano.0c03534] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The electrocatalytic reduction of CO2 (CO2ER) to liquid fuels is important for solving fossil fuel depletion. However, insufficient insight into the reaction mechanisms renders a lack of effective regulation of liquid product selectivity. Here, in situ surface-enhanced Raman spectroscopy (SERS) empowered by 13C/12C isotope exchange is applied to probing the CO2ER process on nanoporous silver (np-Ag). Direct spectroscopic evidence of the preliminary intermediates, *COOH and *OCO-, indicates that CO2 is coordinated to the catalyst via diverse adsorption modes. Further, the relative Raman intensities of the above intermediates vary notably on np-Ag modified by Cu or Pd, and the liquid product selectivity also changes accordingly. Combined with density functional theory calculations, this study demonstrates that the CO2 adsorption configuration is a critical factor governing the reaction selectivity. Meanwhile, *COOH and *OCO- are key targets in the initial stage regulating liquid product selectivity, which could facilitate future selective catalyst design.
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Affiliation(s)
- Wanyu Shan
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rui Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Huachao Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zuoliang He
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yujian Lai
- School of Environment, Hangzhou Institute of Advanced Study, UCAS, Hangzhou 310024, China
| | - Shasha Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Guangzhi He
- Laboratory of Atmospheric Environment and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jingfu Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- School of Environment, Hangzhou Institute of Advanced Study, UCAS, Hangzhou 310024, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
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Chen L, Yan H, Xue X, Jiang D, Cai Y, Liang D, Jung YM, Han XX, Zhao B. Surface-Enhanced Raman Scattering (SERS) Active Gold Nanoparticles Decorated on a Porous Polymer Filter. Appl Spectrosc 2017; 71:1543-1550. [PMID: 28441033 DOI: 10.1177/0003702817703293] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, we designed a process to assemble gold nanoparticles onto a three-dimensional (3D) polymer surface, which can then be monitored using surface-enhanced Raman scattering (SERS). This work is the first demonstration of the assembly of gold nanoparticles on a filter film and in situ measurement with Raman spectroscopy. Herein, a polyhexamethylene adipamide (Nylon66) film embedded in the organic filter film was used as a template to fabricate a tunable SERS-active substrate. A "hotspot"-rich gold-nanoparticle-decorated polymer substrate for SERS was prepared; this substrate exhibited high sensitivity in trace detection of targets. The study was conducted using 4-mercaptobenzoic acid as a probe molecule with the aim of comparing the scattering efficiency and the homogeneity of the Raman signal on selected substrates. In addition, we used the gold-decorated polymer film to detect a biotin-avidin complex. The most powerful advantage of the proposed microanalytical device is the in situ SERS application. The 3D nanoporous structures described in this work hold strong potential for use in various applications such as environmental monitoring and biomolecule detection.
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Affiliation(s)
- Lei Chen
- 1 Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education; Department of Chemistry, Jilin Normal University, Siping, China
- 2 Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chunchon 24341, Republic of Korea
| | - Huiying Yan
- 1 Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education; Department of Chemistry, Jilin Normal University, Siping, China
| | - Xiangxin Xue
- 1 Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education; Department of Chemistry, Jilin Normal University, Siping, China
| | - Dayu Jiang
- 1 Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education; Department of Chemistry, Jilin Normal University, Siping, China
| | - Yuxi Cai
- 1 Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education; Department of Chemistry, Jilin Normal University, Siping, China
| | - Dongmei Liang
- 1 Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education; Department of Chemistry, Jilin Normal University, Siping, China
| | - Young Mee Jung
- 2 Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chunchon 24341, Republic of Korea
| | - Xiao Xia Han
- 3 State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, China
| | - Bing Zhao
- 3 State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, China
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