1
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Yu J, Liu T, Gu Q, Wang J, Han Y, Li G, Guo Q, Gu Y, Wu X, Gong X, Yang B, Mao D. Enhanced Proximity of Rh 1,2-Rh n Ensembles Encaged in UiO-67 Boosting Catalytic Conversion of Syngas to Oxygenates. Angew Chem Int Ed Engl 2024; 63:e202401568. [PMID: 38506189 DOI: 10.1002/anie.202401568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/14/2024] [Accepted: 03/18/2024] [Indexed: 03/21/2024]
Abstract
Maintaining high conversion under the premise of high oxygenates selectivity in syngas conversion is important but a formidable challenge in Rh catalysis. Monometallic Rh catalysts provide poor oxygenate conversion efficiency, and efforts have been focused on constructing adjacent polymetallic sites; however, the one-pass yields of C2+ oxygenates over the reported Rh-based catalysts were mostly <20 %. In this study, we constructed a monometallic Rh catalyst encapsulated in UiO-67 (Rh/UiO-67) with enhanced proximity to dual-site Rh1,2-Rhn ensembles. Unexpectedly, this catalyst exhibited high efficacy for oxygenate synthesis from syngas, giving a high oxygenate selectivity of 72.0 % with a remarkable CO conversion of 50.4 %, and the one-pass yield of C2+ oxygenates exceeded 25 %. The state-of-the-art characterizations further revealed the spontaneous formation of an ensemble of Rh single atoms/dimers (Rh1,2) in the proximity of ultrasmall Rh clusters (Rhn) confined within the nanocavity of UiO-67, providing adjacent Rh+-Rh0 dual sites dynamically during the reaction that promote the relay of the undissociated CHO species to the CHx species. Thus, our results open a new route for designing highly efficient Rh catalysts for the conversion of syngas to oxygenates by precisely tuning the ensemble and proximity of the dual active sites in a confined space.
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Affiliation(s)
- Jun Yu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
| | - Tingting Liu
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Qingqing Gu
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, P. R. China
| | - Jia Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Ying Han
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
| | - Gonghui Li
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
| | - Qiangsheng Guo
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
| | - Ye Gu
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Xinping Wu
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Xueqing Gong
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Bing Yang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, P. R. China
| | - Dongsen Mao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, P. R. China
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2
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Park DA, Son JY, Seo JM, Park BK. Synthesis and Volatility Characterization of Mo(II) and W(II) Compounds for Thin Films. Inorg Chem 2023; 62:16874-16881. [PMID: 37788074 DOI: 10.1021/acs.inorgchem.3c02449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Mo(II) and W(II) compounds, Mo(η3-allyl)(CO)2(Tri-MEDA)Br (1), Mo(η3-allyl)(CO)2(TMEDA)Br (2), W(η3-allyl)(CO)2(Tri-MEDA)Br (3), and W(η3-allyl)(CO)2(TMEDA)Br (4) (Tri-MEDA = N,N,N'-trimethylethylenediamine), were synthesized and characterized. The molecular structures of 1 and 3 were nearly identical with a pseudo-octahedral geometry except for the different Mo and W metal centers. The thermogravimetric analysis of 1 and 3 showed approximately 53 and 64% residues at 550 °C, respectively, which were significantly higher than the values for the expected materials. However, 1 and 3 sublimed at 100 °C under 0.40 Torr and 120 °C under 0.50 Torr, respectively, confirming that they were volatile. For 1 and 3, the temperatures at a vapor pressure of 1 Torr and enthalpies of vaporization (ΔHvap) were 168.78 °C and 143.8 kJ mol-1, and 167.48 °C and 148.5 kJ mol-1, respectively. The tungsten compound (3) exhibited good durability for 5 weeks under a thermal stability test at a sublimation temperature of 120 °C.
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Affiliation(s)
- Da-Ae Park
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT),Daejeon 34114, Republic of Korea
| | - Ji Young Son
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT),Daejeon 34114, Republic of Korea
- Department of Chemistry, Korea University 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Ji Min Seo
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT),Daejeon 34114, Republic of Korea
- Department of Chemistry, Sungkyunkwan University, Suwon-si, Gyeonggi-do 16419, Republic of Korea
| | - Bo Keun Park
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT),Daejeon 34114, Republic of Korea
- Advanced Materials and Chemical Engineering, KRICT School, University of Science and Technology (UST), Daejeon 34114, Republic of Korea
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3
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Jin C, Wang B, Zhou Y, Yang F, Han S, Guo P, Liu Z, Shen W. Gold Atomic Layers and Isolated Atoms on MoC for the Low-Temperature Water Gas Shift Reaction. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Chuanchuan Jin
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Beibei Wang
- Center for Transformative Science, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Yan Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Fan Yang
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Shaobo Han
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Peiyao Guo
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Zhi Liu
- Center for Transformative Science, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Wenjie Shen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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4
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Wang Z, Wang H, Xiao M, Chen X, Dai W, Yu Y, Fu X. Constructing a Channel to Regulate the Electron-Transfer Behavior of CO Adsorption and Light-Driven CO Reduction by H 2 over CuO-ZnO. ACS APPLIED MATERIALS & INTERFACES 2022; 14:22531-22543. [PMID: 35504733 DOI: 10.1021/acsami.1c24984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Photocatalytic conversions of C1 molecules under mild conditions have been widely researched in many fields. Adsorption of reactants at a catalyst surface is an indispensable process for C1 conversion and thus it might play a key role in reaction behavior. Herein, for a ZnO sample without photocatalytic activity for CO + H2 reduction, CuO is introduced into ZnO to regulate the adsorption behavior of CO on the CuO-ZnO surface and then to drive the reduction of CO by H2 under UV irradiation. The results of gas sensitivity tests and various in situ characterization methods are as expected. Specifically, surface zinc vacancies and Cu2+ sites at the interface of ZnO and CuO cooperate to construct a special electron-transfer channel (Zn-O-Cu-O) for CO adsorption [CO (ads)]. A new linear adsorption mode of CO at Cu2+ sites occurs, and this successfully changes the electron-transfer behavior of CO (ads) from donating electrons (to ZnO) to accepting electrons (from CuO-ZnO) via electron-transfer channels and d-electrons of Cu2+ matching. Then, CO molecules are reduced by H2 under UV irradiation. The strategy here provides an insight into the design of highly effective catalysts as well as an in-depth understanding of the mechanism of C1 photocatalytic conversion.
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Affiliation(s)
- Zhongming Wang
- Key Laboratory of Eco-materials Advanced Technology, College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China
- Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350108, China
- Qingyuan Innovation Laboratory, Quanzhou 362801, China
| | - Hong Wang
- Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350108, China
- Qingyuan Innovation Laboratory, Quanzhou 362801, China
| | - Mingquan Xiao
- Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350108, China
- Qingyuan Innovation Laboratory, Quanzhou 362801, China
| | - Xun Chen
- Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350108, China
| | - Wenxin Dai
- Key Laboratory of Eco-materials Advanced Technology, College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China
- Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350108, China
- Qingyuan Innovation Laboratory, Quanzhou 362801, China
| | - Yan Yu
- Key Laboratory of Eco-materials Advanced Technology, College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China
| | - Xianzhi Fu
- Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350108, China
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5
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Zhao W, Guan Z, Li D, Wang B, Fan M, Zhang R. Syngas Conversion to C 2 Species over WC and M/WC (M = Cu or Rh) Catalysts: Identifying the Function of Surface Termination and Supported Metal Type. ACS APPLIED MATERIALS & INTERFACES 2022; 14:19491-19504. [PMID: 35467825 DOI: 10.1021/acsami.2c02217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Improving the selectivity and activity of C2 species from syngas is still a challenge. In this work, catalysts with monolayer Cu or Rh supported over WC with different surface terminations (M/WC (M = Cu or Rh)) are rationally designed to facilitate C2 species generation. The complete reaction network is analyzed by DFT calculations. Microkinetics modeling is utilized to consider the experimental reaction temperature, pressure, and the coverage of the species. The thermal stabilities of the M/WC (M = Cu or Rh) catalysts are confirmed by AIMD simulations. The results show that the surface termination and supported metal types in the M/WC (M = Cu or Rh) catalysts can alter the existence form of abundant CHx (x = 1-3) monomer, as well as the activity and selectivity of CHx monomer and C2 species. Among these, only the Cu/WC-C catalyst is screened out to achieve outstanding activity and selectivity for C2H2 generation, attributing to that the synergistic effect of the subsurface C atoms and the surface monolayer Cu atoms presents the noble-metal-like character to promote the generation of CHx and C2 species. This work demonstrates a new possibility for rational construction of other catalysts with the non-noble metal supported by the metal carbide, adjusting the surface termination of metal carbide and the supported metal types can present the noble-metal-like character to tune catalytic performance of C2 species from syngas.
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Affiliation(s)
- Wantong Zhao
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China
| | - Zun Guan
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China
| | - Debao Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, PR China
| | - Baojun Wang
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China
- Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education, Taiyuan, Shanxi 030024, PR China
| | - Maohong Fan
- College of Engineering and Applied Science, University of Wyoming, Laramie, Wyoming 82071, United States
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- School of Energy Resources, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Riguang Zhang
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China
- Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education, Taiyuan, Shanxi 030024, PR China
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6
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Cao F, Gong N, Ma Z, Wang X, Tan M, Wu Y, Tan Y. Controlling CO 2 hydrogenation selectivity by Rh-based catalysts with different crystalline phases of TiO 2. Chem Commun (Camb) 2022; 58:4219-4222. [PMID: 35274644 DOI: 10.1039/d2cc00472k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of Rh-based catalysts with various crystalline phases (p25, anatase, and rutile) were prepared via the incipient-wetness impregnation method. It was found that these catalysts had different metal-support interactions. Hence, 1%Rh/p, 1%Rh/r, and 1%Rh/a exhibited methane, CO, and methanol selectivity, respectively.
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Affiliation(s)
- Fenghai Cao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Nana Gong
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zixuan Ma
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoxing Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China.
| | - Minghui Tan
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China.
| | - Yingquan Wu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China.
| | - Yisheng Tan
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China. .,National Engineering Research Centre for Coal-Based Synthesis, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
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7
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Schlögl R. Chemische Batterien mit CO
2. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202007397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Robert Schlögl
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
- Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4–6 14195 Berlin Deutschland
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8
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Wang C, Yu H, Lin T, Qi X, Yu F, Zhong L, Sun Y. Direct synthesis of higher alcohols from syngas over modified Mo2C catalysts under mild reaction conditions. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02186a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The RhK/Mo2C catalyst exhibited remarkable selectivity for higher alcohols synthesis from syngas under mild reaction conditions owing to the interface sites between Rh and Mo2C promoted by K, which greatly facilitated CO insertion.
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Affiliation(s)
- Caiqi Wang
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, P.R. China
- University of the Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Hailing Yu
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, P.R. China
- University of the Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Tiejun Lin
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, P.R. China
| | - Xingzhen Qi
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, P.R. China
- University of the Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Fei Yu
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, P.R. China
| | - Liangshu Zhong
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, P.R. China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201203, P.R. China
| | - Yuhan Sun
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, P.R. China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201203, P.R. China
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9
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Multimetallic Rh-La/M/SiO2 (M = W, V, Ce, and Zr) catalysts for oxygenates synthesis from syngas. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116778] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Efficient bimetal loaded (Rh-Ni)/αβ-MoxC catalyst for CO2 methanation. J CHEM SCI 2021. [DOI: 10.1007/s12039-021-01972-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Zou Y, Cheng C, Guo Y, Ong AJ, Goei R, Li S, Yoong Tok AI. Atomic layer deposition of rhodium and palladium thin film using low-concentration ozone. RSC Adv 2021; 11:22773-22779. [PMID: 35480446 PMCID: PMC9034295 DOI: 10.1039/d1ra03942c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 06/21/2021] [Indexed: 11/21/2022] Open
Abstract
Rhodium (Rh) and palladium (Pd) thin films have been fabricated using an atomic layer deposition (ALD) process using Rh(acac)3 and Pd(hfac)2 as the respective precursors and using short-pulse low-concentration ozone as the co-reactant. This method of fabrication does away with the need for combustible reactants such as hydrogen or oxygen, either as a precursor or as an annealing agent. All previous studies using only ozone could not yield metallic films, and required post treatment using hydrogen or oxygen. In this work, it was discovered that the concentration level of ozone used in the ALD process was critical in determining whether the pure metal film was formed, and whether the metal film was oxidized. By controlling the ozone concentration under a critical limit, the fabrication of these noble metal films was successful. Rhodium thin films were deposited between 200 and 220 °C, whereas palladium thin films were deposited between 180 and 220 °C. A precisely controlled low ozone concentration of 1.22 g m−3 was applied to prevent the oxidation of the noble metallic film, and to ensure fast growth rates of 0.42 Å per cycle for Rh, and 0.22 Å per cycle for Pd. When low-concentration ozone was applied to react with ligand, no excess ozone was available to oxidize the metal products. The surfaces of deposited films obtained the RMS roughness values of 0.30 nm for Rh and 0.13 nm for Pd films. The resistivities of 18 nm Rh and 22 nm Pd thin films were 17 μΩ cm and 63 μΩ cm. Rh and Pd metallic thin films were fabricated by atomic layer deposition using Rh(acac)3 and Pd(hfac)2 precursors, and only low-concentration ozone as co-reactant.![]()
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Affiliation(s)
- Yiming Zou
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Chunyu Cheng
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Yuanyuan Guo
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Amanda Jiamin Ong
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Ronn Goei
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Shuzhou Li
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Alfred Iing Yoong Tok
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
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12
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Influence of Carbon Content in Ni-Doped Mo2C Catalysts on CO Hydrogenation to Mixed Alcohol. Catalysts 2021. [DOI: 10.3390/catal11020230] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Herein, we synthesize the Ni-doped Mo2C catalysts by a one-pot preparation method to illuminate the effect of the number of carbon atoms in Mo2C lattice on CO hydrogenation to mixed alcohol. The Ni doping inhibits the agglomeration of Mo2C crystals into large particles and the surface carbon deposition, which increase the active surface area. In addition, the interaction between Ni and Mo increases the electron cloud density of Mo species and promotes the non-dissociative adsorption and insertion of CO. Especially, our results indicate that with the increase of the nickel content, the number of carbon atoms in Mo2C lattice on the surface of the catalyst shows a volcano type variation. The low carbon content induces the formation of coordination unsaturated molybdenum species which exhibit the higher catalytic activity and mixed alcohol selectivity than other molybdenum species. Among the catalysts, the MC-Ni-1.5 catalyst with Ni/Mo molar ratio of 1.5:8.5, which has the largest amount of coordination unsaturated molybdenum species, shows the highest space-time yield of mixed alcohols, which is three times higher than that of the Mo2C catalyst.
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13
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Bai S, Xu Y, Cao K, Huang X. Selective Ethanol Oxidation Reaction at the Rh-SnO 2 Interface. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2005767. [PMID: 33314444 DOI: 10.1002/adma.202005767] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 11/09/2020] [Indexed: 06/12/2023]
Abstract
Direct ethanol fuel cells (DEFCs) are regarded as an attractive power source with high energy density, bio-renewability, and convenient storage and transportation. However, the anodic reaction of DEFCs, that is, the ethanol oxidation reaction (EOR), suffers from poor efficiency due to the low selectivity to CO2 (C1 pathway) and high selectivity to CH3 COOH (C2 pathway). In this study, the selective EOR to CO2 can be achieved at the Rh-SnO2 interface in SnO2 -Rh nanosheets (NSs). The optimized catalyst of 0.2SnO2 -Rh NSs/C exhibits excellent alkaline EOR performance with a mass activity of 213.2 mA mgRh -1 and a Faraday efficiency of 72.8% for the C1 pathway, which are 1.7 and 1.9 times higher than those of Rh NSs/C. Mechanism studies indicate that the strong synergy at the Rh-SnO2 interface significantly promotes the breaking of CC bond of C2 H5 OH to form CO2 , and facilitates oxidation of the poisonous intermediates (* CO and * CH3 ) to suppress the deactivation of the catalyst. This work not only provides a highly selective, active, and stable catalyst for the EOR, but also promotes fundamental research for the design of efficient catalysts via interface modification.
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Affiliation(s)
- Shuxing Bai
- Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou, Guangdong, 510006, China
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China
| | - Yong Xu
- Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou, Guangdong, 510006, China
| | - Kailei Cao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China
| | - Xiaoqing Huang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
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14
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Damma D, Smirniotis PG. Recent advances in the direct conversion of syngas to oxygenates. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00813g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Direct synthesis of oxygenates from syngas is a promising way to utilize non-petroleum carbon resources because the oxygenate products serve as precursors for the downstream production of fuels and value-added chemicals.
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Affiliation(s)
- Devaiah Damma
- Chemical Engineering
- College of Engineering and Applied Science
- University of Cincinnati
- Cincinnati
- USA
| | - Panagiotis G. Smirniotis
- Chemical Engineering
- College of Engineering and Applied Science
- University of Cincinnati
- Cincinnati
- USA
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15
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Nathan SS, Asundi AS, Singh JA, Hoffman AS, Boubnov A, Hong J, Bare SR, Bent SF. Understanding Support Effects of ZnO‐Promoted Co Catalysts for Syngas Conversion to Alcohols Using Atomic Layer Deposition. ChemCatChem 2020. [DOI: 10.1002/cctc.202001630] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sindhu S. Nathan
- Department of Chemical Engineering Stanford University 443 Via Ortega Stanford CA 94305 USA
| | - Arun S. Asundi
- Department of Chemical Engineering Stanford University 443 Via Ortega Stanford CA 94305 USA
| | - Joseph A. Singh
- Department of Chemistry Stanford University 443 Via Ortega Stanford CA 94305 USA
| | - Adam S. Hoffman
- SSRL SLAC National Accelerator Laboratory 2575 Sand Hill Rd Menlo Park CA 94025 USA
| | - Alexey Boubnov
- SSRL SLAC National Accelerator Laboratory 2575 Sand Hill Rd Menlo Park CA 94025 USA
- Present Address: Institute for Chemical Technology and Polymer Chemistry Karlsruhe Institute of Technology 76131 Karlsruhe Germany
| | - Jiyun Hong
- SSRL SLAC National Accelerator Laboratory 2575 Sand Hill Rd Menlo Park CA 94025 USA
| | - Simon R. Bare
- SSRL SLAC National Accelerator Laboratory 2575 Sand Hill Rd Menlo Park CA 94025 USA
| | - Stacey F. Bent
- Department of Chemical Engineering Stanford University 443 Via Ortega Stanford CA 94305 USA
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16
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Rates of levoglucosanol hydrogenolysis over Brønsted and Lewis acid sites on platinum silica-alumina catalysts synthesized by atomic layer deposition. J Catal 2020. [DOI: 10.1016/j.jcat.2020.05.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Abstract
Efforts to obtain raw materials from CO2 by catalytic reduction as a means of combating greenhouse gas emissions are pushing the boundaries of the chemical industry. The dimensions of modern energy regimes, on the one hand, and the necessary transport and trade of globally produced renewable energy, on the other, will require the use of chemical batteries in conjunction with the local production of renewable electricity. The synthesis of methanol is an important option for chemical batteries and will, for that reason, be described here in detail. It is also shown that the necessary, robust, and fundamental understanding of processes and the material science of catalysts for the hydrogenation of CO2 does not yet exist.
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Affiliation(s)
- Robert Schlögl
- Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, 45470, Mülheim an der Ruhr, Germany.,Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
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18
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Asundi AS, Hoffman AS, Bothra P, Boubnov A, Vila FD, Yang N, Singh JA, Zeng L, Raiford JA, Abild-Pedersen F, Bare SR, Bent SF. Understanding Structure-Property Relationships of MoO 3-Promoted Rh Catalysts for Syngas Conversion to Alcohols. J Am Chem Soc 2019; 141:19655-19668. [PMID: 31724857 DOI: 10.1021/jacs.9b07460] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rh-based catalysts have shown promise for the direct conversion of syngas to higher oxygenates. Although improvements in higher oxygenate yield have been achieved by combining Rh with metal oxide promoters, details of the structure of the promoted catalyst and the role of the promoter in enhancing catalytic performance are not well understood. In this work, we show that MoO3-promoted Rh nanoparticles form a novel catalyst structure in which Mo substitutes into the Rh surface, leading to both a 66-fold increase in turnover frequency and an enhancement in oxygenate yield. By applying a combination of atomically controlled synthesis, in situ characterization, and theoretical calculations, we gain an understanding of the promoter-Rh interactions that govern catalytic performance for MoO3-promoted Rh. We use atomic layer deposition to modify Rh nanoparticles with monolayer-precise amounts of MoO3, with a high degree of control over the structure of the catalyst. Through in situ X-ray absorption spectroscopy, we find that the atomic structure of the catalytic surface under reaction conditions consists of Mo-OH species substituted into the surface of the Rh nanoparticles. Using density functional theory calculations, we identify two roles of MoO3: first, the presence of Mo-OH in the catalyst surface enhances CO dissociation and also stabilizes a methanol synthesis pathway not present in the unpromoted catalyst; and second, hydrogen spillover from Mo-OH sites to adsorbed species on the Rh surface enhances hydrogenation rates of reaction intermediates.
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Affiliation(s)
- Arun S Asundi
- Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States
| | - Adam S Hoffman
- SSRL , SLAC National Accelerator Laboratory , Menlo Park , California 94205 , United States
| | - Pallavi Bothra
- Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States.,SUNCAT Center for Interface Science and Catalysis , SLAC National Accelerator Laboratory , Menlo Park , California 94205 , United States
| | - Alexey Boubnov
- SSRL , SLAC National Accelerator Laboratory , Menlo Park , California 94205 , United States
| | - Fernando D Vila
- Department of Physics , University of Washington , Seattle , Washington 98195 , United States
| | - Nuoya Yang
- Department of Materials Science and Engineering , Stanford University , Stanford , California 94305 , United States
| | - Joseph A Singh
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Li Zeng
- Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States
| | - James A Raiford
- Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States
| | - Frank Abild-Pedersen
- Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States.,SUNCAT Center for Interface Science and Catalysis , SLAC National Accelerator Laboratory , Menlo Park , California 94205 , United States
| | - Simon R Bare
- SSRL , SLAC National Accelerator Laboratory , Menlo Park , California 94205 , United States
| | - Stacey F Bent
- Department of Chemical Engineering , Stanford University , Stanford , California 94305 , United States
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19
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Zhang L, Ball MR, Rivera-Dones KR, Wang SC, Kuech TF, Huber GW, Hermans I, Dumesic JA. Synthesis Gas Conversion Over Molybdenum-Based Catalysts Promoted by Transition Metals. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03968] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lifeng Zhang
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - Madelyn R. Ball
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - Keishla R. Rivera-Dones
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - Shao-chun Wang
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Thomas F. Kuech
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - George W. Huber
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - Ive Hermans
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - James A. Dumesic
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
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