1
|
Miao C, Chen S, Shang K, Liang L, Ouyang J. Highly Active Ni-Ru Bimetallic Catalyst Integrated with MFI Zeolite-Loaded Cerium Zirconium Oxide for Dry Reforming of Methane. ACS Appl Mater Interfaces 2022; 14:47616-47632. [PMID: 36223106 DOI: 10.1021/acsami.2c12123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The dry reforming of methane (DRM) is a new potential technology that converts two major greenhouse gases into useful chemical feedstocks. The main challenge faced by this process is maintaining the catalyst with high catalytic activity and long-term stability. Here, a simple and effective preparation route for the synthesis of functional nanomolecular sieve catalysts (NiRuxCZZ5) from kaolinite tailings was developed for dry reforming of methane with CO2. The silica monoliths with flower-like spherical and micropore structures (ZSM-5) were prepared by crystal growth method, and the metal components were loaded by ultrasonic-assisted impregnation method. The NiRu0.5CZZ5 catalyst exhibited excellent catalytic performance (maxmium CO2 and CH4 conversions up to 100 and 95.6%, respectively) and very good stability (up to 100h). The interfacial confinement and the strong support interaction are principally responsible for the excellent catalytic activity of the catalyst. The in situ DRIFTS was used to elucidate the possible carbon conversion steps, and stable surface intermediates were also identified.
Collapse
Affiliation(s)
- Chao Miao
- Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha410083, China
- Centre for Mineral Materials, Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha410083, China
| | - Shumei Chen
- Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha410083, China
- Centre for Mineral Materials, Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha410083, China
| | - Kaixuan Shang
- Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha410083, China
- Centre for Mineral Materials, Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha410083, China
| | - Lixing Liang
- Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha410083, China
- Centre for Mineral Materials, Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha410083, China
| | - Jing Ouyang
- Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha410083, China
- Centre for Mineral Materials, Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha410083, China
- Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Central South University, Changsha410083, China
| |
Collapse
|
2
|
Cored J, Wang M, Akter N, Darbari Z, Xu Y, Karagoz B, Waluyo I, Hunt A, Stacchiola D, Head AR, Concepcion P, Lu D, Boscoboinik JA. Water Formation Reaction under Interfacial Confinement: Al 0.25Si 0.75O 2 on O-Ru(0001). Nanomaterials (Basel) 2022; 12:183. [PMID: 35055203 DOI: 10.3390/nano12020183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/22/2021] [Accepted: 12/28/2021] [Indexed: 11/22/2022]
Abstract
Confined nanosized spaces at the interface between a metal and a seemingly inert material, such as a silicate, have recently been shown to influence the chemistry at the metal surface. In prior work, we observed that a bilayer (BL) silica on Ru(0001) can change the reaction pathway of the water formation reaction (WFR) near room temperature when compared to the bare metal. In this work, we looked at the effect of doping the silicate with Al, resulting in a stoichiometry of Al0.25Si0.75O2. We investigated the kinetics of WFR at elevated H2 pressures and various temperatures under interfacial confinement using ambient pressure X-ray photoelectron spectroscopy. The apparent activation energy was lower than that on bare Ru(0001) but higher than that on the BL-silica/Ru(0001). The apparent reaction order with respect to H2 was also determined. The increased residence time of water at the surface, resulting from the presence of the BL-aluminosilicate (and its subsequent electrostatic stabilization), favors the so-called disproportionation reaction pathway (*H2O + *O ↔ 2 *OH), but with a higher energy barrier than for pure BL-silica.
Collapse
|
3
|
Liu Y, Ning Y, Yu L, Zhou Z, Liu Q, Zhang Y, Chen H, Xiao J, Liu P, Yang F, Bao X. Structure and Electronic Properties of Interface-Confined Oxide Nanostructures. ACS Nano 2017; 11:11449-11458. [PMID: 29035514 DOI: 10.1021/acsnano.7b06164] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The controlled fabrication of nanostructures has often used a substrate template to mediate and control the growth kinetics. Electronic substrate-mediated interactions have been demonstrated to guide the assembly of organic molecules or the nucleation of metal atoms but usually at cryogenic temperatures, where the diffusion has been limited. Combining STM, STS, and DFT studies, we report that the strong electronic interaction between transition metals and oxides could indeed govern the growth of low-dimensional oxide nanostructures. As a demonstration, a series of FeO triangles, which are of the same structure and electronic properties but with different sizes (side length >3 nm), are synthesized on Pt(111). The strong interfacial interaction confines the growth of FeO nanostructures, leading to a discrete size distribution and a uniform step structure. Given the same interfacial configuration, as-grown FeO nanostructures not only expose identical edge/surface structure but also exhibit the same electronic properties, as manifested by the local density of states and local work functions. We expect the interfacial confinement effect can be generally applied to control the growth of oxide nanostructures on transition metal surfaces. These oxide nanostructures of the same structure and electronic properties are excellent models for studies of nanoscale effects and applications.
Collapse
Affiliation(s)
- Yun Liu
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Yanxiao Ning
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Liang Yu
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Zhiwen Zhou
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Qingfei Liu
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Yi Zhang
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Hao Chen
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Jianping Xiao
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Ping Liu
- Chemistry Department, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Fan Yang
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Xinhe Bao
- State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| |
Collapse
|