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Li Q, Gao J, Zang X, Dai C, Zhang H, Xin L, Jin W, Xiao W, Xu G, Wu Z, Wang L. Synergistic Effects of Pyrrolic N/Pyridinic N on Ultrafast Microwave Synthesized Porous CoP/Ni 2P to Boost Electrocatalytic Hydrogen Generation. Inorg Chem 2023; 62:21508-21517. [PMID: 38064289 DOI: 10.1021/acs.inorgchem.3c03826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
Transition metal phosphides are ideal inexpensive electrocatalysts for water-splitting, but the catalytic activity still falls behind that of noble metal catalysts. Therefore, developing valid strategies to boost the electrocatalytic activity is urgent to promote large-scale applications. Herein, a microwave combustion strategy (20 s) is applied to synthesize N-doped CoP/Ni2P heterojunctions (N-CoP/Ni2P) with porous structure. The porous structure expands the specific surface area and accelerates the mass transport efficiency. Importantly, the pyrrolic N/pyridinic N content is adjusted by changing the amount of urea during the synthesis process and then optimizing the adsorption/desorption capacity for H*/OH* to enhance the catalyst activity. Then, the synthesized N-CoP/Ni2P exhibits small overpotentials of 111 and 133 mV for HER in acidic and alkaline electrolytes and 290 mV for OER in alkaline electrolytes. This work provides an original and efficient approach to the synthesis of porous metal phosphides.
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Affiliation(s)
- Qichang Li
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Jinxiao Gao
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Xingchao Zang
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Chunlong Dai
- Shandong Long Antai Environmental Protection Technology Co., Ltd, Weifang, Shandong 261202, China
| | - Huadong Zhang
- Shandong Long Antai Environmental Protection Technology Co., Ltd, Weifang, Shandong 261202, China
| | - Liantao Xin
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Wei Jin
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Weiping Xiao
- College of Science, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Guangrui Xu
- School of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Zexing Wu
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, P. R. China
| | - Lei Wang
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
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Yang W, Chen H, Han X, Ding S, Shan Y, Liu Y. Preparation of magnetic Co-Fe modified porous carbon from agricultural wastes by microwave and steam activation for mercury removal. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120981. [PMID: 31416041 DOI: 10.1016/j.jhazmat.2019.120981] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 08/04/2019] [Accepted: 08/07/2019] [Indexed: 05/28/2023]
Abstract
In this article, a magnetic cobalt-iron modified porous carbon derived from agricultural wastes by microwave and steam activation was developed to remove elemental mercury in coal-fired flue gas. The effects of operating parameters on Hg0 capture were discussed. Reaction mechanism and regeneration performance were also studied. Results show that the activation of microwave and steam significantly improves the pore structure of the porous carbon. The ultrasound-assisted impregnation promotes the dispersion of cobalt oxides and iron oxides on the samples. The Co0.4Fe12/RSWU(500) sorbent exhibits highest Hg0 removal efficiency at 130 °C. The characterization analysis shows that cobalt oxides and iron oxides are the main active components for Hg0 removal. The XPS analysis suggests that the chemisorption oxygen and the lattice oxygen (derived from Co3+/Co2+ and Fe3+/Fe2+) participate in the Hg0 capture process. Moreover, the cobalt-iron mixed oxide modified porous carbon has a good regeneration performance, which is conductive to reduce the costs in the future application.
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Affiliation(s)
- Wei Yang
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Hui Chen
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Xuan Han
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Shuai Ding
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Ye Shan
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Yangxian Liu
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China.
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Trivedi S, Prasad R, Gautam SK. Design of active NiCo
2
O
4‐δ
spinel catalyst for abatement of CO‐CH
4
emissions from CNG fueled vehicles. AIChE J 2018. [DOI: 10.1002/aic.16162] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- S. Trivedi
- Dept. of Chemical Engineering &TechnologyIndian Institute of Technology (BHU)Varanasi 221005 India
| | - R. Prasad
- Dept. of Chemical Engineering &TechnologyIndian Institute of Technology (BHU)Varanasi 221005 India
| | - S. K. Gautam
- Dept. of Chemical Engineering &TechnologyIndian Institute of TechnologyKanpur 208016 India
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Ahmad W, Noor T, Zeeshan M. Effect of synthesis route on catalytic properties and performance of Co3O4/TiO2 for carbon monoxide and hydrocarbon oxidation under real engine operating conditions. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2016.10.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Kim MH, Park SW. Selective reduction of NO by NH3 over Fe-zeolite-promoted V2O5-WO3/TiO2-based catalysts: Great suppression of N2O formation and origin of NO removal activity loss. CATAL COMMUN 2016. [DOI: 10.1016/j.catcom.2016.08.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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6
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Characterization and Catalytic Activity of Mn-Co/TiO2 Catalysts for NO Oxidation to NO2 at Low Temperature. Catalysts 2016. [DOI: 10.3390/catal6010009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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7
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Kim MH, Lee HS. Effect of Fe-zeolite on formation of N2O in selective reduction of NO by NH3 over V2O5–WO3/TiO2 catalyst. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-015-2335-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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8
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Bocchetta P, Amati M, Bozzini B, Catalano M, Gianoncelli A, Gregoratti L, Taurino A, Kiskinova M. Quasi-in-situ single-grain photoelectron microspectroscopy of Co/PPy nanocomposites under oxygen reduction reaction. ACS APPLIED MATERIALS & INTERFACES 2014; 6:19621-19629. [PMID: 25369153 DOI: 10.1021/am504111s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper reports an investigation into the aging of pyrolyzed cobalt/polypyrrole (Co/PPy) oxygen reduction reaction (ORR) electrocatalysts, based on quasi-in-situ photoelectron microspectroscopy. The catalyst precursor was prepared by potentiostatic reverse-pulse coelectrodeposition from an acetonitrile solution on graphite. Accelerated aging was obtained by quasi-in-situ voltammetric cycling in an acidic electrolyte. Using photoelectron imaging and microspectroscopy of single Co/PPy grains at a resolution of 100 nm, we tracked the ORR-induced changes in the morphology and chemical state of the pristine material, consisting of uniformly distributed ∼20 nm nanoparticles, initially consisting of a mixture of Co(II) and Co(III) oxidation states in almost equal amounts. The evolution of the Co 2p, O 1s, and N 1s spectra revealed that the main effects of aging are a gradual loss of the Co present at the surface and the reduction of Co(III) to Co(II), accompanied by the emergence and growth of a N 1s signal, corresponding to electrocatalytically active C-N sites.
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Affiliation(s)
- Patrizia Bocchetta
- Dipartimento di Ingegneria dell'Innovazione, Università del Salento , via Monteroni, 73100 Lecce, Italy
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Xu Y, Zhong Q, Xing L. Gas-phase elemental mercury removal from flue gas by cobalt-modified fly ash at low temperatures. ENVIRONMENTAL TECHNOLOGY 2014; 35:2870-2877. [PMID: 25176492 DOI: 10.1080/09593330.2014.924569] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Co modified fly ash (FA) prepared by the wet impregnation method was investigated for gas-phase elemental mercury capture under air at 80°C in this paper. X-ray fluorescence spectrometry, Brunauer-Emmett-Teller, scanning electron micrographs, X-ray diffraction, thermogravimetric (TG) analysis and X-ray photoelectron spectroscopy (XPS) were employed to characterize the samples. Experimental results showed that the optimal Co loading was 9 wt%, which gave a Hg(0) removal efficiency of 76% in a laboratory packed-bed reactor at low temperatures in the presence of O₂. The high removal efficiency was mainly attributed to oxidation of Hg(0) by the enrichment of well-dispersed Co₃O₄on the surface of FA. However, higher Co loading resulted in the decrease of removal efficiency due to the decline of surface area and Co₃O₄agglomeration. TG and XPS characterization indicated that Hg(0) was oxidized by Co₃O₄and some of the oxidized mercury formed recombination mercury oxide with Co₃O₄, which could either exist stably at low temperature or be desorbed from the adsorbents at higher temperature. Finally, the possible adsorption mechanisms were proposed according to the observed phenomena.
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Affiliation(s)
- Yalin Xu
- a School of Chemical Engineering , Nanjing University of Science and Technology , Nanjing 210094 , People's Republic of China
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Liang YQ, Cui ZD, Zhu SL, Li ZY, Yang XJ, Chen YJ, Ma JM. Design of a highly sensitive ethanol sensor using a nano-coaxial p-Co3O4/n-TiO2 heterojunction synthesized at low temperature. NANOSCALE 2013; 5:10916-10926. [PMID: 24056921 DOI: 10.1039/c3nr03616b] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, we describe the design, fabrication and gas-sensing tests of nano-coaxial p-Co3O4/n-TiO2 heterojunction. Specifically, uniform TiO2 nanotubular arrays have been assembled by anodization and used as templates for generation of the Co3O4 one-dimensional nanorods. The structure morphology and composition of as-prepared products have been characterized by SEM, XRD, TEM, and XPS. A possible growth mechanism governing the formation of such nano-coaxial heterojunctions is proposed. The TiO2 nanotube sensor shows a normal n-type response to reducing ethanol gas, whereas TiO2-Co3O4 exhibits p-type response with excellent sensing performances. This conversion of sensing behavior can be explained by the formation of p-n heterojunction structures. A possible sensing mechanism is also illustrated, which can provide theoretical guidance for the further development of advanced gas-sensitive materials with p-n heterojunction.
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Affiliation(s)
- Y Q Liang
- School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China.
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Liu Y, Wang Y, Wang H, Wu Z. Catalytic oxidation of gas-phase mercury over Co/TiO2 catalysts prepared by sol–gel method. CATAL COMMUN 2011. [DOI: 10.1016/j.catcom.2011.04.017] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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12
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Facile removal of stabilizer-ligands from supported gold nanoparticles. Nat Chem 2011; 3:551-6. [DOI: 10.1038/nchem.1066] [Citation(s) in RCA: 466] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Accepted: 05/03/2011] [Indexed: 11/08/2022]
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Parametric Study on the Deactivation of Supported Co3O4 Catalysts for Low Temperature CO Oxidation. CHINESE JOURNAL OF CATALYSIS 2011. [DOI: 10.1016/s1872-2067(10)60233-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Wu G, Guan N, Li L. Low temperature CO oxidation on Cu–Cu2O/TiO2 catalyst prepared by photodeposition. Catal Sci Technol 2011. [DOI: 10.1039/c1cy00036e] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Seo PW, Choi HJ, Hong SI, Hong SC. A study on the characteristics of CO oxidation at room temperature by metallic Pt. JOURNAL OF HAZARDOUS MATERIALS 2010; 178:917-925. [PMID: 20207073 DOI: 10.1016/j.jhazmat.2010.02.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Revised: 02/01/2010] [Accepted: 02/08/2010] [Indexed: 05/28/2023]
Abstract
Various experiments and analysis were conducted in order to manufacture a catalyst that could very efficiently oxidize carbon monoxide at room temperature and also to identify the relevant factors influencing the oxidation reaction. Pt/TiO(2) catalyst can increase the oxidizing capability of CO at low temperature and room temperature by reduction. In FT-IR experiments, the catalyst that displayed excellent activity was capable of efficiently oxidizing CO to CO(2) using atmospheric oxygen. Based on the results of XPS analysis, we found that the reduced catalyst changed the platinum's oxidation value to Pt(+2) and Pt(+0). Through the O(2)-reoxidation experiments, the catalyst, which consisted of non-stoichiometric platinum oxidized species, displayed an excellent ability to accept oxygen. In this study, the Pt/TiO(2) catalyst was able to very efficiently oxidize CO at low temperature and room temperature even with a minute quantity of platinum.
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Affiliation(s)
- Phil Won Seo
- Department of Chemical and Biological Engineering, Korea University, 1, 5-Ga, Anam-dong, Sungbuk-ku, Seoul 136-701, Republic of Korea
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Petsi T, Panagiotou G, Garoufalis C, Kordulisâ C, Stathi P, Deligiannakis Y, Lycourghiotis A, Bourikasâ K. Interfacial Impregnation Chemistry in the Synthesis of Cobalt Catalysts Supported on Titania. Chemistry 2009; 15:13090-104. [DOI: 10.1002/chem.200900760] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Herranz T, Deng X, Cabot A, Guo J, Salmeron M. Influence of the Cobalt Particle Size in the CO Hydrogenation Reaction Studied by In Situ X-Ray Absorption Spectroscopy. J Phys Chem B 2009; 113:10721-7. [DOI: 10.1021/jp901602s] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tirma Herranz
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Advance Light Source, Lawrence Berkeley National Laboratory, Materials Science and Engineering Department, University of California, Berkeley, California 94720
| | - Xingyi Deng
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Advance Light Source, Lawrence Berkeley National Laboratory, Materials Science and Engineering Department, University of California, Berkeley, California 94720
| | - Andreu Cabot
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Advance Light Source, Lawrence Berkeley National Laboratory, Materials Science and Engineering Department, University of California, Berkeley, California 94720
| | - Jingua Guo
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Advance Light Source, Lawrence Berkeley National Laboratory, Materials Science and Engineering Department, University of California, Berkeley, California 94720
| | - Miquel Salmeron
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Advance Light Source, Lawrence Berkeley National Laboratory, Materials Science and Engineering Department, University of California, Berkeley, California 94720
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