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Paul R, Maity N, Das B, Emadian SS, Kumar A, Krishnamurthy S, Singh AK, Ghosh R. Efficient detection of 45 ppb ammonia at room temperature using Ni-doped CeO 2 octahedral nanostructures. J Colloid Interface Sci 2024; 662:663-675. [PMID: 38368824 DOI: 10.1016/j.jcis.2024.02.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/30/2024] [Accepted: 02/07/2024] [Indexed: 02/20/2024]
Abstract
To meet the requirements in air quality monitors for the public and industrial safety, sensors are required that can selectively detect the concentration of gaseous pollutants down to the parts per million (ppm) and ppb (parts per billion) levels. Herein, we report a remarkable NH3 sensor using Ni-doped CeO2 octahedral nanostructure which efficiently detects NH3 as low as 45 ppb at room temperature. The Ni-doped CeO2 sensor exhibits the maximum response of 42 towards 225 ppm NH3, which is ten-fold higher than pure CeO2. The improved sensing performance is caused by the enhancement of oxygen vacancy, bandgap narrowing, and redox property of CeO2 caused by Ni doping. Density functional theory confirms that O vacancy with Ni at Ce site (VONiCe) augments the sensing capabilities. The Bader charge analysis predicts the amount of charge transfer (0.04 e) between the Ni-CeO2 surface and the NH3 molecule. As well, the high negative adsorption energy (≈750 meV) and lowest distance (1.40 Å) of the NH3 molecule from the sensor surface lowers the detection limit. The present work enlightens the fabrication of sensing elements through defect engineering for ultra-trace detection of NH3 to be useful further in the field of sensor applications.
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Affiliation(s)
- Rinku Paul
- Materials Processing & Microsystems Laboratory, CSIR-Central Mechanical Engineering Research Institute, Durgapur 713209, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Nikhilesh Maity
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Biswajit Das
- Materials Processing & Microsystems Laboratory, CSIR-Central Mechanical Engineering Research Institute, Durgapur 713209, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Seyedeh Sadrieh Emadian
- School of Engineering and Innovations, The Open University, Milton Keynes MK7 6AA, United Kingdom
| | - Ajay Kumar
- School of Engineering and Innovations, The Open University, Milton Keynes MK7 6AA, United Kingdom
| | - Satheesh Krishnamurthy
- School of Engineering and Innovations, The Open University, Milton Keynes MK7 6AA, United Kingdom
| | | | - Ranajit Ghosh
- Materials Processing & Microsystems Laboratory, CSIR-Central Mechanical Engineering Research Institute, Durgapur 713209, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India.
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2
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Wang H, Li Y, Han J, Zhang C, Wang H, Liu D, Hou X, Zhang L, Gao Z. Formation of superoxide and ozone-like species on Cu doped CeO 2(111) and their CO oxidation reactivity: a DFT study. Phys Chem Chem Phys 2023; 25:32557-32568. [PMID: 37999632 DOI: 10.1039/d3cp03885h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
The adsorption of O2 on Cu/CeO2(111) and the CO oxidation reactivity of the formed oxygen species were studied using the DFT method. The results showed that superoxide species (O2δ-), which directly interacted with Cu, formed when O2 adsorbed on the surface oxygen vacancies, while O2 adsorbed on the subsurface oxygen vacancies gave rise to ozone-like O3δ- species by combining with the nearest surface lattice oxygen (O1). PDOS showed that hybridization of the 2p orbitals between O2 and O1 formed a delocalized π bond, confirming the formation of O3δ-. For O2δ-, electrons on Cu and O1 transferred to O2 while the charge of Ce remained unchanged. However, for O3δ-, the transferred electrons were mainly from O1, and partially from O2, Ce1 and Ce2. It was very interesting that Cu also received a few electrons in the latter case. Compared with CO directly adsorbed on lattice oxygen, the two oxygen species were active for CO oxidation, forming CO2 or carbonates, and higher absolute adsorption energy was obtained with the interaction between CO and O3δ-. The findings of this study provide new insight on the CO oxidation reaction mechanism, facilitating an in-depth understanding of Cu-doped CeO2 catalysts.
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Affiliation(s)
- Hao Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China.
| | - Yuan Li
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China.
| | - Jiao Han
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China.
| | - Caishun Zhang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China.
| | - Honghao Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China.
| | - Daosheng Liu
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China.
| | | | - Lei Zhang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China.
| | - Zhixian Gao
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China.
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3
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Chen X, Song P, Li W, Wang J, Gui T, Zhang W, Ge F, Zhu L. A pH-responsive polymer-coated CaO 2as oxygen-generating nanoparticle in situfor enhanced chemo-photodynamic synergistic therapy against tumors. NANOTECHNOLOGY 2023; 34:455101. [PMID: 37544302 DOI: 10.1088/1361-6528/aced9c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 08/06/2023] [Indexed: 08/08/2023]
Abstract
Photodynamic therapy (PDT) has emerged as an efficient strategy for tumor treatment. However, Insufficient amounts of inherent hypoxia and intrinsic hydrogen peroxide (H2O2) in the tumor microenvironment severely constrained PDT, as oxygen is the critical substrate for photosensitivity reaction. Here, a pH-responsive H2O2and O2self-supplying hybrid nanoparticle was designed. Through, the calcium peroxide (CaO2) as carriers loading a chemotherapeutic drug a photosensitizer 5,10,15,20-tetrakis(4-aminophenyl) porphyrin (TAPP) and doxorubicin (DOX), was covered with polyacrylic acid (PAA) to build up a feature material DOX-TAPP-CaO2@OA@PAA (denoted as DTCOP) through the reverse microemulsion method. In the acidic tumor microenvironment conditions exposing the water-sensitive CaO2nanocore to generate hydrogen peroxide (H2O2) and O2, the self-supplied O2alleviates hypoxia to enhance the PDT, and releasing DOX and TAPP. Synthetic characterization shows that the succeeded synthesized Nanocarriers could effectively carry DOX and TAPP to the tumor site and release O2at the low pH of TME. And the experimental results demonstrated that this interpose exogenous oxygen strategy is efficient at inhibition of tumor growth bothin vitroandin vivo. The nanocomposite exhibits excellent biocompatibility and the ability to inhibit tumor growth and has significant potential for the treatment of hypoxic tumors.
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Affiliation(s)
- Xiaolu Chen
- College of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, Anhui, People's Republic of China
| | - Ping Song
- College of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, Anhui, People's Republic of China
| | - Wanzhen Li
- College of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, Anhui, People's Republic of China
| | - Jun Wang
- College of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, Anhui, People's Republic of China
| | - Ting Gui
- College of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, Anhui, People's Republic of China
| | - Weiwei Zhang
- College of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, Anhui, People's Republic of China
| | - Fei Ge
- College of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, Anhui, People's Republic of China
| | - Longbao Zhu
- College of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, Anhui, People's Republic of China
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4
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Amaral DC, Rocha LSR, Granone LI, Lage MM, Churio MS, Sanchez MD, Longo E, Nascimento HMS, Assis M, Moura F, Ponce MA. Manganese Defective Clustering: Influence on the Spectroscopic Features of Ceria-Based Nanomaterials. Inorg Chem 2023. [PMID: 37478498 DOI: 10.1021/acs.inorgchem.3c01597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2023]
Abstract
The influence of manganese modification on the spectroscopic features of manganese-doped CeO2 systems synthesized by the microwave-assisted hydrothermal route and their correlation with the presence of O defective structures were verified, focusing on their interaction with poisonous atmospheres. Raman and electron paramagnetic resonance studies confirmed the presence of defective clusters formed by dipoles and/or quadrupoles. The number of paramagnetic species was found to be inversely proportional to the doping concentration, resulting in an increase in the Mn2+ signal, likely due to the reduction of Mn3+ species after the interaction with CO. X-ray photoelectron spectroscopy data showed the pure system with 33% of its cerium species in the Ce3+ configuration, with an abrupt decrease to 19%, after the first modification with Mn, suggesting that 14% of the Ce3+ species are donating one electron to the Mn2+ ions, thus becoming nonparamagnetic Ce4+ species. On the contrary, 58% of the manganese species remain in the Mn2+ configuration with five unpaired electrons, corroborating the paramagnetic feature of the samples seen in the electron paramagnetic resonance study.
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Affiliation(s)
- D C Amaral
- Advanced Materials Interdisciplinary Laboratory (LIMAV), Federal University of Itajubá (UNIFEI), Itabira 37500-903, Brazil
| | - L S R Rocha
- Center for Research and Development of Functional Materials (CDMF), Federal University of São Carlos (UFSCar), São Carlos 13565-90, Brazil
| | - L I Granone
- Department of Chemistry and Biochemistry, FCEyN/IFIMAR, CONICET, National University of Mar del Plata, Mar del Plata B7606FWV, Argentina
| | - M M Lage
- Advanced Materials Interdisciplinary Laboratory (LIMAV), Federal University of Itajubá (UNIFEI), Itabira 37500-903, Brazil
| | - M S Churio
- Department of Chemistry and Biochemistry, FCEyN/IFIMAR, CONICET, National University of Mar del Plata, Mar del Plata B7606FWV, Argentina
| | - M D Sanchez
- Instituto de Física del Sur (IFISUR), Departamento de Física, Universidad Nacional del Sur (UNS), CONICET, Bahía Blanca B8000CPB, Argentina
| | - E Longo
- Center for Research and Development of Functional Materials (CDMF), Federal University of São Carlos (UFSCar), São Carlos 13565-90, Brazil
| | - H M S Nascimento
- Advanced Materials Interdisciplinary Laboratory (LIMAV), Federal University of Itajubá (UNIFEI), Itabira 37500-903, Brazil
| | - M Assis
- Department of Analytical and Physical Chemistry, Jaume I University (UJI), Castelló 12071, Spain
| | - F Moura
- Advanced Materials Interdisciplinary Laboratory (LIMAV), Federal University of Itajubá (UNIFEI), Itabira 37500-903, Brazil
| | - M A Ponce
- Advanced Materials Interdisciplinary Laboratory (LIMAV), Federal University of Itajubá (UNIFEI), Itabira 37500-903, Brazil
- Physics and Engineering Research Center, National University of the Center of the Province of Buenos Aires (UNCPBA-CICPBA-CONICET), Tandil B7000GHG, Argentina
- Institute of Materials Science and Technology (INTEMA), University of Mar del Plata (UNMdP), CONICET, Mar del Plata B7606 FWV, Argentina
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5
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Feng Y, Hu X, Guo X, Wang N. Exploration of the reaction mechanism of the LaFeO 3 oxygen carrier for chemical-looping steam methane reforming: a DFT study. Phys Chem Chem Phys 2023; 25:13033-13040. [PMID: 37114351 DOI: 10.1039/d2cp05795f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
The CO conversion is expected to be controllable for chemical-looping steam methane reforming. Herein, density functional theory (DFT) calculations were employed to systematically explore the detailed reaction mechanism of CO conversion over the LaFeO3 oxygen carrier. It is found that the FeO2-terminated surface could exhibit better activity for CO adsorption than the LaO-terminated surface. In addition, the FeO2-terminated surface is much more favorable for CO oxidation than the LaO-terminated surface and the Fe-O site is the main active site. The oxygen diffusion process is easier to proceed on the LaO-terminated surface compared with the FeO2-terminated surface. Four pathways for the reaction process between the FeO2-terminated surface and CO were proposed and oxygen diffusion was determined as the rate-limiting step. For the reaction of CO with the LaO-terminated surface, one pathway was considered and CO2 desorption is the rate-limiting step. Comprehensively, the reactivity of CO conversion over the FeO2-terminated surface is superior to that over the LaO-terminated surface. We could control the CO conversion by regulating the oxygen activity of LaFeO3. This work provides guidance for the rational design of LaFeO3 oxygen carriers in the CL-SRM process.
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Affiliation(s)
- Yuchuan Feng
- College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Xiude Hu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Xin Guo
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Nana Wang
- College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
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6
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Chen D, Su Z, Si W, Qu Y, Zhao X, Liu H, Yang Y, Wang Y, Peng Y, Chen J, Li J. Boosting CO Catalytic Oxidation Performance via Highly Dispersed Copper Atomic Clusters: Regulated Electron Interaction and Reaction Pathways. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:2928-2938. [PMID: 36752384 DOI: 10.1021/acs.est.2c07687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Copper-loaded ceria (Cu/CeO2) catalysts have become promising for the catalytic oxidation of industrial CO emissions. Since their superior redox property mainly arises from the synergistic effect between Cu and the CeO2 support, the dispersion state of Cu species may dominate the catalytic performance of Cu/CeO2 catalysts: the extremely high or low dispersity is disadvantageous for the catalytic performance. The nanoparticle catalysts usually present few contact sites, while the single-atom catalysts tend to be passivated due to their relatively single valence state. To achieve a suitable dispersion state, we synthesized a superior Cu/CeO2 catalyst with Cu atomic clusters, realizing high atomic exposure and unit atomic activity simultaneously via favorable electron interaction and an anchoring effect. The catalyst reaches a 90% CO conversion at 130 °C, comparable to noble-metal catalysts. According to combined in situ spectroscopy and density functional theory calculations, the superior CO oxidation performance of the Cu atomic cluster catalyst results from the joint efforts of effective adsorption of CO at the electrophilic sites, the CO spillover phenomenon, and the efficient bicarbonate pathway triggered by hydroxyl. By providing a superior atomic cluster catalyst and uncovering the catalytic oxidation mechanism of Cu-Ce dual-active sites, our work may enlighten future research on industrial gaseous pollutant removal.
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Affiliation(s)
- Deli Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Ziang Su
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Wenzhe Si
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Yakun Qu
- Sinopec Research Institute of Petroleum Processing, Beijing 100083, China
| | - Xiaoguang Zhao
- Sinopec Research Institute of Petroleum Processing, Beijing 100083, China
| | - Hao Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Yu Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Yu Wang
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Yue Peng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Jianjun Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Junhua Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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7
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Yan Z, Xu H, Huang L, Fu H, Li S. Partial Oxidation of Methane to Methanol on the M-O-Ag/Graphene (M = Ag, Cu) Composite Catalyst: A DFT Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2422-2434. [PMID: 36734609 DOI: 10.1021/acs.langmuir.2c03305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Partial oxidation of methane (CH4) to methanol (CH3OH) remains a great challenge in the field of catalysis due to its low selectivity and productivity. Herein, Ag-O-Ag/graphene and Cu-O-Ag/graphene composite catalysts are proposed to oxidize methane (CH4) to methanol (CH3OH) by using the first-principles calculations. It is shown that reactive oxygen species (μ-O) on both catalysts can activate the C-H bond of CH4, and in addition to CH4 activation, the catalytic activity follows the order of Ag-O-Ag/graphene (singlet) > Ag-O-Ag/graphene (triplet) ≈ Cu-O-Ag/graphene (triplet) > Cu-O-Ag/graphene (singlet). For CH3OH* formation, the catalytic activity follows the order of Cu-O-Ag/graphene (triplet) > Ag-O-Ag/graphene (triplet) > Ag-O-Ag/graphene (singlet) > Cu-O-Ag/graphene (singlet). It can be inferred that the introduction of Cu not only reduces the use of noble metal Ag but also exhibits a catalytic effect comparable to that of the Ag-O-Ag/graphene catalyst. Our findings will provide a new avenue for understanding and designing highly effective catalysts for the direct conversion of CH4 to CH3OH.
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Affiliation(s)
- Zhiguo Yan
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan430205, P. R. China
| | - Haiquan Xu
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan430205, P. R. China
| | - Ling Huang
- Key Laboratory of Green Chemical Process of Ministry of Education, Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan430205, P. R. China
| | - Heqing Fu
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou510641, P. R. China
| | - Shaoping Li
- Hubei Three Gorges Laboratory, Yichang443007, China
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8
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Pal D, Maity D, Sarkar A, Sarkar D, Khan GG. Effect of defect-rich Co-CeOx OER cocatalyst on the photocarrier dynamics and electronic structure of Sb-doped TiO2 nanorods photoanode. J Colloid Interface Sci 2022; 620:209-220. [DOI: 10.1016/j.jcis.2022.04.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/28/2022] [Accepted: 04/01/2022] [Indexed: 01/20/2023]
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9
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Kim E, Lee J, Bae C, Seok H, Kim HU, Kim T. Effects of trivalent lanthanide (La and Nd) doped ceria abrasives on chemical mechanical polishing. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2021.11.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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10
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Du S, Zhang H, Deng C, Wang X, Zhai R, Wen Z. Promoting the mechanism of OMS-2 for gas adsorption in different K + concentrations. RSC Adv 2022; 12:30549-30556. [PMCID: PMC9597291 DOI: 10.1039/d2ra05493k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 10/08/2022] [Indexed: 11/05/2022] Open
Abstract
Adsorption performances between the OMS-2 catalyst and CH4 and O2 molecules are enhanced with increasing tunnel K+ concentration.
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Affiliation(s)
- Shuangli Du
- College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Huan Zhang
- College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Cunbao Deng
- College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Xuefeng Wang
- College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Ruicong Zhai
- College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Zhijie Wen
- Key Laboratory of Mining Disaster Prevention and Control, Qingdao 266590, China
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11
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Tian D, Denny SR, Li K, Wang H, Kattel S, Chen JG. Density functional theory studies of transition metal carbides and nitrides as electrocatalysts. Chem Soc Rev 2021; 50:12338-12376. [PMID: 34580693 DOI: 10.1039/d1cs00590a] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Transition metal carbides and nitrides are interesting non-precious materials that have been shown to replace or reduce the loading of precious metals for catalyzing several important electrochemical reactions. The purpose of this review is to summarize density functional theory (DFT) studies, describe reaction pathways, identify activity and selectivity descriptors, and present a future outlook in designing carbide and nitride catalysts for the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), oxygen reduction reaction (ORR), nitrogen reduction reaction (N2RR), CO2 reduction reaction (CO2RR) and alcohol oxidation reactions. This topic is of high interest to scientific communities working in the field of electrocatalysis and this review should provide theoretical guidance for the rational design of improved carbide and nitride electrocatalysts.
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Affiliation(s)
- Dong Tian
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization/Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, China. .,Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA. .,Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Steven R Denny
- Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA.
| | - Kongzhai Li
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization/Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, China.
| | - Hua Wang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization/Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, China.
| | - Shyam Kattel
- Department of Physics, Florida A&M University, Tallahassee, FL, 32307, USA.
| | - Jingguang G Chen
- Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA. .,Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
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12
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Defect engineering for high-selection-performance of NO reduction to NH3 over CeO2 (111) surface: A DFT study. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.05.072] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Xie Z, Li Z, Tang P, Song Y, Zhao Z, Kong L, Fan X, Xiao X. The effect of oxygen vacancies on the coordinatively unsaturated Al-O acid-base pairs for propane dehydrogenation. J Catal 2021. [DOI: 10.1016/j.jcat.2021.03.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Morales‐García Á, Viñes F, Gomes JRB, Illas F. Concepts, models, and methods in computational heterogeneous catalysis illustrated through
CO
2
conversion. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2021. [DOI: 10.1002/wcms.1530] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ángel Morales‐García
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB) Universitat de Barcelona Barcelona Spain
| | - Francesc Viñes
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB) Universitat de Barcelona Barcelona Spain
| | - José R. B. Gomes
- CICECO—Aveiro Institute of Materials, Department of Chemistry University of Aveiro Aveiro Portugal
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB) Universitat de Barcelona Barcelona Spain
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15
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Lin L, Yao L, Li S, Shi Z, Xie K, Tao H, Zhang Z, Zhang Z. Study on the adsorption selection of CH$$_4$$ on CuO (110) versus (111) surfaces: a density functional theory study. SN APPLIED SCIENCES 2021. [DOI: 10.1007/s42452-021-04386-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
AbstractFinding the active sites of suitable metal oxides is a key prerequisite for detecting CH$$_4$$
4
. The purpose of the paper is to investigate the adsorption of CH$$_4$$
4
on intrinsic and oxygen-vacancies CuO (111) and (110) surfaces using density functional theory calculations. The results show that CH$$_4$$
4
has a strong adsorption energy of −0.370 to 0.391 eV at all site on the CuO (110) surface. The adsorption capacity of CH$$_4$$
4
on CuO (111) surface is weak, ranging from −0.156 to −0.325 eV. In the surface containing oxygen vacancies, the adsorption capacity of CuO surface to CH$$_4$$
4
is significantly stronger than that of intrinsic CuO surface. The results indicate that CuO (110) has strong adsorption and charge transfer capacity for CH$$_4$$
4
, which may provide experimental guidance.
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16
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Bui HT, Weon S, Bae JW, Kim EJ, Kim B, Ahn YY, Kim K, Lee H, Kim W. Oxygen vacancy engineering of cerium oxide for the selective photocatalytic oxidation of aromatic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2021; 404:123976. [PMID: 33080555 DOI: 10.1016/j.jhazmat.2020.123976] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/26/2020] [Accepted: 09/11/2020] [Indexed: 06/11/2023]
Abstract
The engineering of oxygen vacancies in CeO2 nanoparticles (NPs) allows the specific fine-tuning of their oxidation power, and this can be used to rationally control their activity and selectivity in the photocatalytic oxidation (PCO) of aromatic pollutants. In the current study, a facile strategy for generating exceptionally stable oxygen vacancies in CeO2 NPs through simple acid (CeO2-A) or base (CeO2-B) treatment was developed. The selective (or mild) PCO activities of CeO2-A and CeO2-B in the degradation of a variety of aromatic substrates in water were successfully demonstrated. CeO2-B has more oxygen vacancies and exhibits superior photocatalytic performance compared to CeO2-A. Control of oxygen vacancies in CeO2 facilitates the adsorption and reduction of dissolved O2 due to their high oxygen-storage ability. The oxygen vacancies in CeO2-B as active sites for oxygen-mediated reactions act as (i) adsorption and reduction reaction sites for dissolved O2, and (ii) photogenerated electron scavenging sites that promote the formation of H2O2 by multi-electron transfer. The oxygen vacancies in CeO2-B are particularly stable and can be used repeatedly over 30 h without losing activity. The selective PCOs of organic substrates were studied systematically, revealing that the operating mechanisms for UV-illuminated CeO2-B are very different from those for conventional TiO2 photocatalysts. Thus, the present study provides new insights into the design of defect-engineered metal oxides for the development of novel photocatalysts.
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Affiliation(s)
- Hoang Tran Bui
- Department of Chemical and Biological Engineering, Research Institute of Global Environment, Sookmyung Women's University, Seoul 140-742, Republic of Korea
| | - Seunghyun Weon
- School of Health and Environmental Science, Korea University, Seoul 02841, Republic of Korea
| | - Ji Won Bae
- Department of Chemistry, Sookmyung Women's University, Seoul 140-742, Republic of Korea
| | - Eun-Ju Kim
- Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Bupmo Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Yong-Yoon Ahn
- Korea Polar Research Institute (KOPRI), Incheon 21990, Republic of Korea
| | - Kitae Kim
- Korea Polar Research Institute (KOPRI), Incheon 21990, Republic of Korea
| | - Hangil Lee
- Department of Chemistry, Sookmyung Women's University, Seoul 140-742, Republic of Korea.
| | - Wooyul Kim
- Department of Chemical and Biological Engineering, Research Institute of Global Environment, Sookmyung Women's University, Seoul 140-742, Republic of Korea.
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17
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Zhou J, Du L, Braedt DL, Miao J, Senanayake SD. Growth, sintering, and chemical states of Co supported on reducible CeO 2(111) thin films: The effects of the metal coverage and the nature of the support. J Chem Phys 2021; 154:044704. [PMID: 33514090 DOI: 10.1063/5.0036952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The growth, sintering, and interaction of cobalt with ceria were studied under ultrahigh vacuum conditions by vapor-deposition of Co onto well-defined CeOx(111) (1.5 < x < 2) thin films grown on Ru(0001). Charge transfer from Co to ceria occurs upon deposition of Co on CeO1.96 and partially reduced CeO1.83 at 300 K. X-ray photoelectron spectroscopy studies show that Co is oxidized to Co2+ species at the cost of the reduction of Ce4+ to Ce3+, at a lesser extent on reduced ceria. Co2+ is the predominant species on CeO1.96 at low Co coverages (e.g., ≤0.20 ML). The ratio of metallic Co/Co2+ increases with the increase in the Co coverage. However, both metallic Co and Co2+ species are present on CeO1.83 even at low Co coverages with metallic Co as the major species. Scanning tunneling microscopy results demonstrate that Co tends to wet the CeO1.96 surface at very low Co coverages at room temperature forming one-atomic layer high structures of Co-O-Ce. The increase in the Co coverage can cause the particle growth into three-dimensional structures. The formation of slightly flatter Co particles was observed on reduced CeO1.83. In comparison with other transition metals including Ni, Rh, Pt, and Au, our studies demonstrate that Co on ceria exhibits a smaller particle size and higher thermal stability, likely arising from strong metal-support interactions. The formed particles upon Co deposition at 300 K are present on the ceria surface after heating to 1000 K. The Co-ceria interface can be tuned by varying the Co metal coverage, the annealing temperature, and the nature of the ceria surface.
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Affiliation(s)
- Jing Zhou
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, USAChemistry Division, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Linze Du
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, USA
| | - Daniel L Braedt
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, USA
| | - Jintao Miao
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, USA
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18
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Zhang G, Jin X, Li X, Meng K, Wang J, Zhang Q, Chen X, Liu Y, Feng X, Yang C. Electronic coupling enhanced PtCo/CeO2 hybrids as highly active catalysts for the key dehydrogenation step in conversion of bio-derived polyols. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2020.116060] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Li S, Li Y, Bäumer M, Moskaleva LV. Assessment of PBE+U and HSE06 methods and determination of optimal parameter U for the structural and energetic properties of rare earth oxides. J Chem Phys 2020; 153:164710. [PMID: 33138436 DOI: 10.1063/5.0024499] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Rare earth oxides are attracting increasing interest as a relatively unexplored group of materials with potential applications in heterogeneous catalysis and electrocatalysis; therefore, a credible and universal computational approach is needed for modeling their reactivity. In this work, we systematically assessed the performance of the PBE+U method against the results of the hybrid HSE06 method with respect to the description of structural parameters and energetic properties of the selected hexagonal lanthanide sesquioxides and the cubic fluorite-type cerium dioxide. In addition, we evaluated the performance of PBE+U in describing the electronic structure and adsorption properties of the CeO2(111) and Nd2O3(0001) surfaces. The HSE06 method reproduces rather well the lattice parameters and selected energetic properties with respect to the experimental values. The PBE+U method is able to reproduce the results of HSE06 or the experimental values only if the U parameter is selected from an appropriate range of values. The U value around 3 eV gives the best description of the lattice parameters of most bulk oxides. 2 eV-3 eV is also found to be the optimal range of U for the reaction energies of bulk La2O3, Ce2O3, Nd2O3, Er2O3, and Ho2O3. U = 1 eV gives the best results for Pr2O3, Pm2O3, Eu2O3, Tm2O3, and Lu2O3, whereas Gd2O3 could not be accurately described by the PBE+U method. The U values (∼3 eV) found optimal for most bulk oxides also work well in the calculations of adsorption of small molecules on Nd2O3(0001) and CeO2(111), although larger U values are required to obtain sufficient localization of 4f electrons.
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Affiliation(s)
- Shikun Li
- Institute of Applied and Physical Chemistry, Faculty 02, University of Bremen, 28359 Bremen, Germany
| | - Yong Li
- Institute of Applied and Physical Chemistry, Faculty 02, University of Bremen, 28359 Bremen, Germany
| | - Marcus Bäumer
- Institute of Applied and Physical Chemistry, Faculty 02, University of Bremen, 28359 Bremen, Germany
| | - Lyudmila V Moskaleva
- Institute of Applied and Physical Chemistry, Faculty 02, University of Bremen, 28359 Bremen, Germany
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20
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Zhao S, Kang D, Liu Y, Wen Y, Xie X, Yi H, Tang X. Spontaneous Formation of Asymmetric Oxygen Vacancies in Transition-Metal-Doped CeO2 Nanorods with Improved Activity for Carbonyl Sulfide Hydrolysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02832] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shunzheng Zhao
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Dongjuan Kang
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yunpeng Liu
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Yanfeng Wen
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xizhou Xie
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Honghong Yi
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Xiaolong Tang
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, 100083, China
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21
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Liu Y, Tian D, Biswas AN, Xie Z, Hwang S, Lee JH, Meng H, Chen JG. Transition Metal Nitrides as Promising Catalyst Supports for Tuning CO/H
2
Syngas Production from Electrochemical CO
2
Reduction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003625] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yumeng Liu
- Department of Chemical Engineering Columbia University 821 Mudd Building New York NY 10027 USA
- School of Advanced Materials Peking University Shenzhen Graduate School Peking University Shenzhen Guangdong Province 518055 China
| | - Dong Tian
- Department of Chemical Engineering Columbia University 821 Mudd Building New York NY 10027 USA
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization/Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming Yunnan Province 650093 China
| | - Akash N. Biswas
- Department of Chemical Engineering Columbia University 821 Mudd Building New York NY 10027 USA
| | - Zhenhua Xie
- Chemistry Division Brookhaven National Laboratory Building 555 Upton NY 11973 USA
| | - Sooyeon Hwang
- Center for Functional Nanomaterials Brookhaven National Laboratory Upton NY 11973 USA
| | - Ji Hoon Lee
- Department of Chemical Engineering Columbia University 821 Mudd Building New York NY 10027 USA
| | - Hong Meng
- School of Advanced Materials Peking University Shenzhen Graduate School Peking University Shenzhen Guangdong Province 518055 China
| | - Jingguang G. Chen
- Department of Chemical Engineering Columbia University 821 Mudd Building New York NY 10027 USA
- Chemistry Division Brookhaven National Laboratory Building 555 Upton NY 11973 USA
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22
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Liu Y, Tian D, Biswas AN, Xie Z, Hwang S, Lee JH, Meng H, Chen JG. Transition Metal Nitrides as Promising Catalyst Supports for Tuning CO/H
2
Syngas Production from Electrochemical CO
2
Reduction. Angew Chem Int Ed Engl 2020; 59:11345-11348. [DOI: 10.1002/anie.202003625] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Yumeng Liu
- Department of Chemical Engineering Columbia University 821 Mudd Building New York NY 10027 USA
- School of Advanced Materials Peking University Shenzhen Graduate School Peking University Shenzhen Guangdong Province 518055 China
| | - Dong Tian
- Department of Chemical Engineering Columbia University 821 Mudd Building New York NY 10027 USA
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization/Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming Yunnan Province 650093 China
| | - Akash N. Biswas
- Department of Chemical Engineering Columbia University 821 Mudd Building New York NY 10027 USA
| | - Zhenhua Xie
- Chemistry Division Brookhaven National Laboratory Building 555 Upton NY 11973 USA
| | - Sooyeon Hwang
- Center for Functional Nanomaterials Brookhaven National Laboratory Upton NY 11973 USA
| | - Ji Hoon Lee
- Department of Chemical Engineering Columbia University 821 Mudd Building New York NY 10027 USA
| | - Hong Meng
- School of Advanced Materials Peking University Shenzhen Graduate School Peking University Shenzhen Guangdong Province 518055 China
| | - Jingguang G. Chen
- Department of Chemical Engineering Columbia University 821 Mudd Building New York NY 10027 USA
- Chemistry Division Brookhaven National Laboratory Building 555 Upton NY 11973 USA
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23
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He Q, Tian D, Jiang H, Cao D, Wei S, Liu D, Song P, Lin Y, Song L. Achieving Efficient Alkaline Hydrogen Evolution Reaction over a Ni 5 P 4 Catalyst Incorporating Single-Atomic Ru Sites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1906972. [PMID: 31984566 DOI: 10.1002/adma.201906972] [Citation(s) in RCA: 124] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 12/26/2019] [Indexed: 06/10/2023]
Abstract
Developing efficient electrocatalysts for alkaline water electrolysis is central to substantial progress of alkaline hydrogen production. Herein, a Ni5 P4 electrocatalyst incorporating single-atom Ru (Ni5 P4 -Ru) is synthesized through the filling of Ru3+ species into the metal vacancies of nickel hydroxides and subsequent phosphorization treatment. Electron paramagnetic resonance spectroscopy, X-ray-based measurements, and electron microscopy observations confirm the strong interaction between the nickel-vacancy defect and Ru cation, resulting in more than 3.83 wt% single-atom Ru incorporation in the obtained Ni5 P4 -Ru. The Ni5 P4 -Ru as an alkaline hydrogen evolution reaction catalyst achieves low onset potential of 17 mV and an overpotential of 54 mV at a current density of 10 mA cm-2 together with a small Tafel slope of 52.0 mV decade-1 and long-term stability. Further spectroscopy analyses combined with density functional theory calculations reveal that the doped Ru sites can cause localized structure polarization, which brings the low energy barrier for water dissociation on Ru site and the optimized hydrogen adsorption free energy on the interstitial site, well rationalizing the experimental reactivity.
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Affiliation(s)
- Qun He
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Dong Tian
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, 650093, China
| | - Hongliang Jiang
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, China
- School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Dengfeng Cao
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Shiqiang Wei
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Daobin Liu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Pin Song
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Yue Lin
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Li Song
- National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, China
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24
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Kye SH, Park HS, Zhang R, Yang HJ, Lee KH, Suh H, Kim JG, Kim MG, Hwang GS, Hur NH. Partial oxidation of methane to methanol by isolated Pt catalyst supported on a CeO 2 nanoparticle. J Chem Phys 2020; 152:054715. [PMID: 32035467 DOI: 10.1063/1.5135741] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Catalytic transformation of methane (CH4) into methanol in a single step is a challenging issue for the utilization of CH4. We present a direct method for converting CH4 into methanol with high selectivity over a Pt/CeO2 catalyst which contains ionic Pt2+ species supported on a CeO2 nanoparticle. The Pt/CeO2 catalyst reproducibly yielded 6.27 mmol/g of Pt with a selectivity of over 95% at 300 °C when CH4 and CO are used as reactants, while the catalyst had a lower activity when using only CH4 without CO. Active lattice oxygen created on the Pt and CeO2 interface provides selective reaction pathways for the conversion of CH4 to methanol. Based on high-angle annular dark-field scanning transmission electron microscopy, x-ray photoelectron spectroscopy, x-ray absorption near-edge structure, extended x-ray absorption fine structure, catalytic studies, and density functional theory calculations, we propose a mechanistic pathway involving CH4 activation at the active site in the vicinity of Pt2+ species.
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Affiliation(s)
- So-Hwang Kye
- Department of Chemistry, Sogang University, Seoul 04107, South Korea
| | - Hee Sun Park
- Department of Chemistry, Sogang University, Seoul 04107, South Korea
| | - Renqin Zhang
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Hee Jung Yang
- Department of Chemistry, Sogang University, Seoul 04107, South Korea
| | - Kyu Hyung Lee
- Department of Chemistry, Sogang University, Seoul 04107, South Korea
| | - Hoyoung Suh
- Electron Microscopy Research Center, Korea Basic Science Institute, Daejeon 34133, South Korea
| | - Jin-Gyu Kim
- Electron Microscopy Research Center, Korea Basic Science Institute, Daejeon 34133, South Korea
| | - Min Gyu Kim
- Beamline Research Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 37673, South Korea
| | - Gyeong S Hwang
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Nam Hwi Hur
- Department of Chemistry, Sogang University, Seoul 04107, South Korea
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25
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Abstract
Methane activation chemistry, despite being widely reported in literature, remains to date a subject of debate. The challenges in this reaction are not limited to methane activation but extend to stabilization of the intermediate species. The low C-H dissociation energy of intermediates vs. reactants leads to CO2 formation. For selective oxidation, nature presents methane monooxygenase as a benchmark. This enzyme selectively consumes methane by breaking it down into methanol. To assemble an active site similar to monooxygenase, the literature reports Cu-ZSM-5, Fe-ZSM-5, and Cu-MOR, using zeolites and systems like CeO2/Cu2O/Cu. However, the trade-off between methane activation and methanol selectivity remains a challenge. Density functional theory (DFT) calculations and spectroscopic studies indicate catalyst reducibility, oxygen mobility, and water as co-feed as primary factors that can assist in enabling higher selectivity. The use of chemical looping can further improve selectivity. However, in all systems, improvements in productivity per cycle are required in order to meet the economical/industrial standards.
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26
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Deng K, Lin L, Rui N, Vovchok D, Zhang F, Zhang S, Senanayake SD, Kim T, Rodriguez JA. Studies of CO2 hydrogenation over cobalt/ceria catalysts with in situ characterization: the effect of cobalt loading and metal–support interactions on the catalytic activity. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00962h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal–oxide interactions affect the catalytic properties of Co/CeO2 and can be used to control activity and selectivity.
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Affiliation(s)
- Kaixi Deng
- Department of Chemistry
- Stony Brook University
- Stony Brook
- USA
| | - Lili Lin
- Chemistry Division
- Brookhaven National Laboratory
- Upton
- USA
| | - Ning Rui
- Chemistry Division
- Brookhaven National Laboratory
- Upton
- USA
| | | | - Feng Zhang
- Materials Science and Chemical Engineering Department
- Stony Brook University
- Stony Brook
- USA
| | - Shuhao Zhang
- Materials Science and Chemical Engineering Department
- Stony Brook University
- Stony Brook
- USA
| | | | - Taejin Kim
- Materials Science and Chemical Engineering Department
- Stony Brook University
- Stony Brook
- USA
| | - José A. Rodriguez
- Department of Chemistry
- Stony Brook University
- Stony Brook
- USA
- Chemistry Division
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27
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Shen D, Huo M, Li L, Lyu S, Wang J, Wang X, Zhang Y, Li J. Effects of alumina morphology on dry reforming of methane over Ni/Al2O3 catalysts. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02093d] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ni-based catalysts supported on alumina with different morphologies exhibited different properties for the dry reforming of methane due to their specific lattice planes, 3D structures, and surface functional properties.
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Affiliation(s)
- Dongyang Shen
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Miaomiao Huo
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Lin Li
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Shuai Lyu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Juhan Wang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Xiaoyan Wang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Yuhua Zhang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Jinlin Li
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
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