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Xiong Y, Li J, Wang X, Chi X, Li S, Sun Y, Tang Z, Hou Z, Xie J, Yang Z, Yan YM. Electronegative Phosphorus-Integrated Co 2+ Active Sites for Enhanced Electrocatalytic Nitrogen Reduction. Inorg Chem 2024; 63:7886-7895. [PMID: 38621298 DOI: 10.1021/acs.inorgchem.4c00618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
In the quest for proficient electrocatalysts for ammonia's electrocatalytic nitrogen reduction, cobalt oxides, endowed with a rich d-electron reservoir, have emerged as frontrunners. Despite the previously evidenced prowess of CoO in this realm, its ammonia yield witnesses a pronounced decline as the reaction unfolds, a phenomenon linked to the electron attrition from its Co2+ active sites during electrocatalytic nitrogen reduction reaction (ENRR). To counteract this vulnerability, we harnessed electron-laden phosphorus (P) elements as dopants, aiming to recalibrate the electronic equilibrium of the pivotal Co active site, thereby bolstering both its catalytic performance and stability. Our empirical endeavors showcased the doped P-CoO's superior credentials: it delivered an impressive ammonia yield of 49.6 and, notably, a Faradaic efficiency (FE) of 9.6% at -0.2 V versus RHE, markedly eclipsing its undoped counterpart. Probing deeper, a suite of ex-situ techniques, complemented by rigorous theoretical evaluations, was deployed. This dual-pronged analysis unequivocally revealed CoO's propensity for an electron-driven valence metamorphosis to Co3+ post-ENRR. In stark contrast, P-CoO, fortified by P doping, exhibits a discernibly augmented ammonia yield. Crucially, P's intrinsic ability to staunch electron leakage from the active locus during ENRR ensures the preservation of the valence state, culminating in enhanced catalytic dynamism and fortitude. This investigation not only illuminates the intricacies of active site electronic modulation in ENRR but also charts a navigational beacon for further enhancements in this domain.
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Affiliation(s)
- Yuanyuan Xiong
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Jingxian Li
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Xiaoxuan Wang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Xinyue Chi
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Shuyuan Li
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Yanfei Sun
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Zheng Tang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Zishan Hou
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Jiangzhou Xie
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Zhiyu Yang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Yi-Ming Yan
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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Yalcin K, Kurtoğlu-Öztulum SF, Sarac Oztuna FE, Kanat GH, Unal U, Uzun A. Active Sites and Their Individual Turnover Frequencies for Ethylene Hydrogenation on Reduced Graphene Aerogel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4044-4053. [PMID: 38369776 DOI: 10.1021/acs.langmuir.3c02848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Graphene aerogel (GA) was reduced at various temperatures to prepare a series of reduced graphene aerogels (rGAs) with different surface characteristics. Detailed characterization demonstrated that an increase in the thermal reduction temperature leads to an increase in surface area accompanied by an increase in surface density of defect sites formed by the removal of the oxygen-containing functional groups. rGA samples were then tested for ethylene hydrogenation under identical conditions. A comparison of catalytic performances of each catalyst demonstrated that the rGA sample prepared by reduction in Ar at 900 °C (rGA-900) provides the highest performance compared with others prepared at lower temperatures. Next, we analyzed the per-gram activity of each catalyst as a sum of individual contributions from different defect sites quantified by Raman spectroscopy and CHNS-O analysis to determine the individual turnover frequencies (TOFs) of each active site. This analysis identified polyene-like structures and interstitial defects associated with amorphous sp2 bonded carbon atoms as the dominant active sites responsible for hydrogenation. A comparison of their TOFs further indicated that the polyene-like structures provide approximately ten times higher TOF compared to those associated with the amorphous carbon defects. These results, identifying the dominant active centers and quantifying their corresponding TOFs, provide opportunities toward the rational design of GA-based carbocatalysts.
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Affiliation(s)
- Kaan Yalcin
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
- Koç University TÜPRAŞ Energy Center (KUTEM), Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
| | - Samira F Kurtoğlu-Öztulum
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
- Koç University TÜPRAŞ Energy Center (KUTEM), Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
- Department of Materials Science and Technology, Faculty of Science, Turkish-German University, Sahinkaya Cad. 86, Beykoz, 34820 Istanbul, Turkey
| | - F Eylul Sarac Oztuna
- Department of Chemistry, Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
| | - Gizem Hasibe Kanat
- Department of Chemistry, Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
| | - Ugur Unal
- Koç University TÜPRAŞ Energy Center (KUTEM), Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
- Department of Chemistry, Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
- Koç University Surface Science and Technology Center (KUYTAM), Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
| | - Alper Uzun
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
- Koç University TÜPRAŞ Energy Center (KUTEM), Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
- Koç University Surface Science and Technology Center (KUYTAM), Koç University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
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Huang Z, Rafiq M, Woldu AR, Tong QX, Astruc D, Hu L. Recent progress in electrocatalytic nitrogen reduction to ammonia (NRR). Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Zhao Y, Yan L, Zhao X. Development of Carbon‐Based Electrocatalysts for Ambient Nitrogen Reduction Reaction: Challenges and Perspectives. ChemElectroChem 2022. [DOI: 10.1002/celc.202101126] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yanchao Zhao
- School of Materials Science and Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 People's Republic of China
- State Key Laboratory of Heavy Oil Processing College of Chemical Engineering China University of Petroleum (East China) Qingdao 266580 People's Republic of China
| | - Liting Yan
- School of Materials Science and Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 People's Republic of China
| | - Xuebo Zhao
- School of Materials Science and Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 People's Republic of China
- State Key Laboratory of Heavy Oil Processing College of Chemical Engineering China University of Petroleum (East China) Qingdao 266580 People's Republic of China
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Einollahipeer F, Okati N. High efficient Hg (II) and TNP removal by NH 2 grafted magnetic graphene oxide synthesized from Typha latifolia. ENVIRONMENTAL TECHNOLOGY 2021; 43:1-17. [PMID: 34057883 DOI: 10.1080/09593330.2021.1937708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/24/2021] [Indexed: 06/12/2023]
Abstract
The present study for the first time manifests the outstanding potential of amine grafted magnetic graphene oxide (m-GO-NH2) synthesized from Typha latifolia stems for mercury (Hg (II)) and 2,4,6-trinitrophenol (TNP) removal. The adsorption performance of m-GO-NH2 was apprized by considering the impact of the contact time (0-120 min), pH (2-9), adsorbent dose (5-40 mg), and adsorbate concentration (10-50 mg/L). The maximum Hg (II) and TNP removals (∼ 100%) were obtained using 30 mg adsorbent dose in 90 and 75 min, respectively. The best performance of m-GO-NH2 was observed at pH of 7, 20 mg/L Hg (II), and pH of 2, 30 mg/L TNP. According to the Brunauer-Emmett-Teller (BET) analysis, the surface area of GO was 34.81 m2/g and the simultaneous micro and mesoporosity was observed. Regarding the thermodynamic studies, the adsorption procedure was spontaneous and endothermic for Hg (II) followed Redlich-Peterson (R-P) and Freundlich isotherm equations while it was exothermic for TNP, well fitted with Langmuir and R-P isotherms. Kinetic data also indicated a good correlation with pseudo-second-order model. The highest adsorption capacity was estimated as 107.33 and 105.2 mg/g for Hg (II) and TNP, respectively. Accordingly, the proposed m-GO-NH2 can be a promising adsorbent for the elimination of metal and organic contaminants.
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Affiliation(s)
- Fatemeh Einollahipeer
- Department of Environment, Faculty of Natural Resources, University of Zabol, Zabol, Iran
| | - Narjes Okati
- Department of Environment, Faculty of Natural Resources, University of Zabol, Zabol, Iran
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Guo Z, Qiu S, Li H, Xu Y, Langford SJ, Sun C. Electrocatalytic Nitrogen Reduction Performance of Si‐doped 2D Nanosheets of Boron Nitride Evaluated via Density Functional Theory. ChemCatChem 2021. [DOI: 10.1002/cctc.202001775] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Zhongyuan Guo
- Science & Technology Innovation Institute Dongguan University of Technology Dongguan 523808 P. R. China
- Department of Chemistry and Biotechnology Faculty of Science Engineering & Technology Swinburne University of Technology Hawthorn Victoria 3122 Australia
| | - Siyao Qiu
- Science & Technology Innovation Institute Dongguan University of Technology Dongguan 523808 P. R. China
| | - Huan Li
- Science & Technology Innovation Institute Dongguan University of Technology Dongguan 523808 P. R. China
| | - Yongjun Xu
- Science & Technology Innovation Institute Dongguan University of Technology Dongguan 523808 P. R. China
| | - Steven J. Langford
- Department of Chemistry and Biotechnology Faculty of Science Engineering & Technology Swinburne University of Technology Hawthorn Victoria 3122 Australia
| | - Chenghua Sun
- Department of Chemistry and Biotechnology Faculty of Science Engineering & Technology Swinburne University of Technology Hawthorn Victoria 3122 Australia
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