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The feasibility study of the indium oxide supported silver catalyst for selective hydrogenation of CO_(2)to methanol

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Green Energy & Environment 2022年第4期7卷 807-817页

作者： Kaihang Sun Zhitao Zhang Chenyang Shen Ning Rui Chang-jun Liu School of Chemical Engineering and Technology Tianjin UniversityTianjin300072China

Silver catalyst has been extensively investigated for photocatalytic and electrochemical CO_(2) ***,its high activity for selective hydrogenation of CO_(2) to methanol has not been ***,the feasibility of the indium oxide supported silver catalyst was investigated for CO_(2) hydrogenation to methanol by the density functional theoretical(DFT)study and then by the experimental *** DFT study shows there exists an intense Ag-In_(2)O_(3) interaction,which causes silver to be positively *** positively charged Ag species changes the electronic structure of the metal,facilitates the formation of the Ag-In_(2)O_(3) interfacial site for activation and dissociation of carbon *** promoted CO_(2) dissociation leads to the enhanced methanol synthesis via the CO hydrogenation route as CO_(2)^(*)→CO^(*)→HCO^(*)→H_(2)CO^(*)→H_(3)CO^(*)→H_(3)COH^(*).The Ag/In_(2)O_(3)catalyst was then prepared using the deposition-precipitation *** experimental study confirms the theoretical *** methanol selectivity of CO_(2) hydrogenation on Ag/In_(2)O_(3) reaches 100.0%at reaction temperature of 200℃.It remains more than 70.0%between 200 and 275℃.At 300℃and 5 MPa,the methanol selectivity still keeps 58.2%with a CO_(2) conversion of 13.6%and a space-time yield(STY)of methanol of 0.453 g_(methanol)g_(cat)^(-1)h^(-1),which is the highest methanol STY ever reported for silver *** catalyst characterization confirms the intense Ag-In_(2)O_(3)interaction as well,which causes high Ag dispersion,increases and stabilizes the oxygen vacancies and creates the active Ag-In_(2)O_(3)interfacial site for the enhanced CO_(2)hydrogenation to methanol.

关键词： Carbon dioxide Hydrogenation Methanol indium oxide Silver

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Phase composition,conductivity,and sensor properties of cerium-doped indium oxide

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Nano Materials Science 2024年第2期6卷 193-200页

作者： M.I.Ikim G.N.Gerasimov V.F.Gromov O.J.Ilegbusi L.I.Trakhtenberg N.N.Semenov Federal Research Center for Chemical Physics of RAS MoscowRussia University of Central Florida OrlandoFLUSA Moscow Institute of Physics and Technology(State University) DolgoprudnyMoscow RegionRussia Lomonosov Moscow State University MoscowRussia

The hydrothermal synthesis of In_(2)O_(3)and CeO_(2)–In_(2)O_(3)is investigated as well as the properties of sensor layers based on these *** the synthesis of In_(2)O_(3),intermediate products In(OH)_(3)and InOOH are formed,which are the precursors of stable cubic(c-In_(2)O_(3))and metastable rhombohedral(rh-In_(2)O_(3))phases,respectively.A transition from c-In_(2)O_(3)to rh-In_(2)O_(3)is observed with the addition of CeO_(2).The introduction of cerium into rh-In_(2)O_(3)results in a decrease in the sensor response to hydrogen,while it increases in composites based on c-In_(2)O_(3).The data on the sensor activity of the composites correlate with XPS results in which CeO_(2)causes a decrease in the concentrations of chemisorbed oxygen and oxygen vacancies in rh-In_(2)O_(3).The reverse situation is observed in composites based on c-In_(2)O_(3).Compared to In_(2)O_(3)and CeO_(2)–In_(2)O_(3)obtained by other methods,the synthesized composites demonstrate maximum response to H_(2)at low temperatures by 70–100℃,and have short response time(0.2–0.5 s),short recovery time(6–7 s),and long-term stability.A model is proposed for the dependence of sensitivity on the direction of electron transfer between In_(2)O_(3)and CeO_(2).

关键词： Cerium oxide indium oxide Nanocomposite Hydrothermal method Cubic phase Rhombohedral phase Sensor response Conductivity Hydrogen Response/recovery time

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Synthesis and Characterization of indium Niobium oxide Thin Films via Sol—Gel Spin Coating Method

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Journal of Materials Science & Technology 2013年第10期29卷 923-928页

作者： Saeed Mohammadi Mohammad Reza Golobostanfard Hossein Abdizadeh School of Metallurgy and Materials Engineering College of EngineeringUniversity of Tehran Center of Excellence for High Performance Materials University of Tehran

In the present study, niobium-doped indium oxide thin films were prepared by sol-gel spin coating technique. The effects of different Nb-doping contents on structural, morphological, optical, and electrical properties of the films were characterized by means of X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM）, atomic force microscopy （AFM）, UV-Vis spectroscopy, and four point probe methods. XRD analysis confirmed the formation of cubic bixbyite structure of In203 with a small shift in major peak position toward lower angles with addition of Nb. FESEM micrographs show that grain size decreased with increasing the Nb-doping content. Optical and electrical studies revealed that optimum opto-electronic properties, including minimum electrical resistivity of 119.4 × 10^-3 Ω cm and an average optical transmittance of 85% in the visible region with a band gap of 3.37 eV were achieved for the films doped with Nb-doping content of 3 at.%. AFM studies show that addition of Nb at optimum content leads to the formation of compact films with smooth surface and less average roughness compared with the prepared ln2O3 films.

关键词： indium oxide Nb-doping Sol-gel spin coating Transparent conductive oxide Opto-electronic properties

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Correlating the crystal structure and facet of indium oxides with their activities for CO_(2)electroreduction

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Fundamental Research 2024年第3期4卷 635-641页

作者： Jiajun Wang Guangjin Wang Han Wu Fei Liu Xixi Ren Yidu Wang Yanhui Cao Qi Lu Xuerong Zheng Xiaopeng Han Yida Deng Wenbin Hu School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China School of Materials Science and Energy Engineering Foshan UniversityFoshan 528000China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

Constructing structure-function relationships is critical for the rational design and development of efficient catalysts for CO_(2) electroreduction reaction(CO_(2)RR).In_(2)O_(3) is well-known for its specific ability to produce formic ***,how the crystal phase and surface affect the CO_(2)RR activity is still unclear,making it difficult to further improve the intrinsic activity and screen for the most active *** this work,cubic and hexagonal In_(2)O_(3) with different stable surfaces((111)and(110)for cubic,(120)and(104)for hexagonal)are investigated for CO_(2)*** results demonstrate that the adsorption of reactants on cubic In_(2)O_(3) is stronger than that on hexagonal In_(2)O_(3),with the cubic(111)surface being the most active for CO_(2)*** experiments,synthesized cubic In_(2)O_(3) nanosheets with predominantly exposed(111)surfaces exhibited a high HCOO^(-)Faradaic efficiency(87.5%)and HCOO^(–)current density(–16.7 mA cm^(-2))at–0.9 V vs *** addition,an aqueous Zn-CO_(2) battery based on a cubic In2O3 cathode was *** work correlates the phases and surfaces with the CO_(2)RR activity,and provides a fundamental understanding of the structure-function relationship of In_(2)O_(3),thereby contributing to further improvements in its CO_(2)RR ***,the results provide a principle for the directional preparation of materials with optimal phases and surfaces for efficient electrocatalysis.

关键词： Structure-function relationship CO_(2)electroreduction indium oxide Reactionmechanism Catalyst design

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Selective hydrogenation of CO2 to methanol over Ni/In2O3 catalyst

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Journal of Energy Chemistry 2020年第11期29卷 409-415页

作者： Xinyu Jia Kaihang Sun Jing Wang Chenyang Shen Chang-jun Liu School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China

An In2O3 supported nickel catalyst has been prepared by wet chemical reduction with sodium borohydride(NaBH4) as a reducing agent for selective hydrogenation of carbon dioxide to methanol. Highly dispersed Ni species with intense Ni-In2O3 interaction and enhanced oxygen vacancies have been *** highly dispersed Ni species serve as the active sites for hydrogen activation and hydrogen *** H adatoms are thereby generated for the oxygen vacancy creation on the In2O3 surface. The enhanced surface oxygen vacancies further lead to improved CO2 conversion. As a result, an effective synergy between the active Ni sites and surface oxygen vacancies on In2O3 causes a superior catalytic performance for CO2 hydrogenation with high methanol selectivity. Carbon monoxide is the only by product detected. The formation of methane can be ignored. When the reaction temperature is lower than 225 ℃,the selectivity of methanol is 100%. It is higher than 64% at the temperature range between 225 ℃ and 275 ℃. The methanol selectivity is still higher than 54% at 300 ℃ with a CO2 conversion of 18.47% and a methanol yield of 0.55 gMeOHg-1cath-1(at 5 MPa). The activity of Ni/In2O3 is higher than most of the reported In2O3-based catalysts.

关键词： Methanol CO2 hydrogenation indium oxide Ni/In2O3 Oxygen vacancy

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Preparation of large In(OH)3 and In2O3 particles through a seed-mediated growth method in a microreactor

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Particuology 2020年第2期18卷 1-8页

作者： Jingchuo Wang Shaoqing Bai Yujun Wang Guangsheng Luo Tao Wang State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

indium hydroxide(ln(OH)3)and indium oxide(ln2O3)particles are typically synthesized through chemical precipitation *** this study,we used a seed-mediated growth method and microreactor-based synthesis *** synthesized cubic In(OH)3 particles with a crystal size of 172 nm from an 5%(w/v)indium chloride *** In2O3 particles synthesized through the thermal decomposition of In(OH)3 particles featured crystals up to 90 nm in size with an average size of 73 nm,which were much larger than the 20-30 nm In2O3 particles synthesized by a traditional precipitation *** concentrations of the seed and growth solutions were varied from 1%to 7%(w/v).The crystal size of the particles increased with the concentration of the seed and growth solutions;this tendency was the opposite to that observed for the precipitation *** the use of a 5%(w/v)seed solution,the flow rate of the growth solution was varied from 1 to 10mL/min,and the resulting crystal size decreased as the flow rate was *** understand the reasons for this trend,the growth rate of the crystals was determined at different flow rates(i.e.,1,5,and 10 mL/min).A growth model consistent with the experimental results was established,which demonstrated that slow addition of the growth solution was beneficial for preparing large indium hydroxide particles.

关键词： indium hydroxide indium oxide Growth model Crystal size Seed-mediated growth

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MOF-Transformed In_(2)O_(3-x)@C Nanocorn Electrocatalyst for Efficient CO_(2)Reduction to HCOOH

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Nano-Micro Letters 2022年第10期14卷 219-234页

作者： Chen Qiu Kun Qian Jun Yu Mingzi Sun Shoufu Cao Jinqiang Gao Rongxing Yu Lingzhe Fang Youwei Yao Xiaoqing Lu Tao Li Bolong Huang Shihe Yang Guangdong Key Lab of Nano-Micro Material Research School of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate SchoolShenzhen 518055People’s Republic of China Department of Chemistry and Biochemistry Northern Illinois UniversityDeKalbIL 60115USA Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China School of Materials Science and Engineering China University of PetroleumQingdaoShandong 266580People’s Republic of China Shenzhen International Graduate School Tsinghua UniversityShenzhenPeople’s Republic of China X-Ray Science Division and Joint Center for Energy Storage Research Argonne National LaboratoryLemontIL 60439USA Institute of Biomedical Engineering Shenzhen Bay LaboratoryShenzhen 518107People’s Republic of China

For electrochemical CO_(2) reduction to HCOOH,an ongoing challenge is to design energy efficient electrocatalysts that can deliver a high HCOOH current density(JHCOOH)at a low *** oxide is good HCOOH production catalyst but with low *** this work,we report a unique corn design of In_(2)O_(3-x)@C nanocatalyst,wherein In_(2)O_(3-x)nanocube as the fine grains dispersed uniformly on the carbon nanorod cob,resulting in the enhanced *** performance is achieved with 84%Faradaic efficiency(FE)and 11 mA cm^(−2)JHCOOH at a low potential of−0.4 V versus *** the current density of 100 mA cm^(−2),the applied potential remained stable for more than 120 h with the FE above 90%.Density functional theory calculations reveal that the abundant oxygen vacancy in In_(2)O_(3-x) has exposed more In^(3+) sites with activated electroactivity,which facilitates the formation of HCOO**** X-ray absorp-tion spectroscopy also confirms In^(3+) as the active site and the key intermediate of HCOO*during the process of CO_(2) reduction to HCOOH.

关键词： CO_(2)reduction indium oxide Formate Corn design Active sites

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Synergistic effect of the metal-support interaction and interfacial oxygen vacancy for CO_(2) hydrogenation to methanol over Ni/In_(2)O_(3) catalyst:A theoretical study

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Journal of Energy Chemistry 2022年第2期31卷 623-629页

作者： Chenyang Shen Qianqian Bao Wenjuan Xue Kaihang Sun Zhitao Zhang Xinyu Jia Donghai Mei Chang-jun Liu Collaborative Innovation Center of Chemical Science&Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China State Key Laboratory of Membrane Separation and Membrane Processes School of Environmental Science and EngineeringTiangong UniversityTianjin 300387China

indium oxide supported nickel catalyst has been experimentally confirmed to be highly active for CO_(2) hydrogenation towards *** this work,the reaction mechanism for CO_(2) hydrogenation to methanol has been investigated on a model Ni/In_(2)O_(3) catalyst,i.e.,Ni_(4)/In_(2)O_(3),via the density functional theory(DFT)*** possible reaction pathways,i.e.,the formate pathway,CO hydrogenation and the reverse water-gas-shift(RWGS)pathways,have been examined on this model *** has been demonstrated that the RWGS pathway is the most theoretically-favored for CO_(2) hydrogenation to *** complete RWGS pathway follows CO_(2)+6 H→COOH+5 H→CO+H_(2)O+4 H→HCO+H_(2)O+3 H→H_(2)CO+H_(2)O+2 H→H_(3)CO+H_(2)O+H→H_(3)COH+H_(2) ***,it has been also proved that the interfacial oxygen vacancy can serve as the active site for boosting the CO_(2) adsorption and charge transfer between the nickel species and indium oxide,which synergistically promotes the consecutive CO_(2) hydrogenation towards methanol.

关键词： CO_(2)hydrogenation indium oxide Nickel Methanol synthesis Oxygen vacancy Density functional theory

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Tailored BiVO_(4)/In_(2)O_(3)nanostructures with boosted charge separation ability toward unassisted water splitting

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Carbon Energy 2023年第6期5卷 45-59页

作者： Mi Gyoung Lee Jin Wook Yang Ik Jae Park Tae Hyung Lee Hoonkee Park Woo Seok Cheon Sol ALee Hyungsoo Lee Su Geun Ji Jun Min Suh Jooho Moon Jin Young Kim Ho Won Jang Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoulRepublic of Korea Country Department of Applied Physics Sookmyung Women's UniversitySeoulRepublic of Korea Department of Materials Science and Engineering Yonsei UniversitySeoulRepublic of Korea Advanced Institute of Convergence Technology Seoul National UniversitySuwonRepublic of Korea

The development of new heterostructures with high photoactivity is a breakthrough for the limitation of solar-driven water ***,we first introduce indium oxide(In_(2)O_(3))nanorods(NRs)as a novel electron transport layer for bismuth vanadate(BiVO_(4))with a short charge diffusion ***_(2)O_(3)NRs reinforce the electron transport and hole blocking of BiVO_(4),surpassing the state-of-the-art photoelectrochemical performances of BiVO_(4)-based ***,a tannin-nickel-iron complex(TANF)is used as an oxygen evolution catalyst to speed up the reaction *** final TANF/BiVO_(4)/In_(2)O_(3)NR photoanode generates photocurrent densities of 7.1 mAcm^(−2) in sulfite oxidation and 4.2 mA cm^(−2) in water oxidation at 1.23 V versus the reversible hydrogen ***,the“artificial leaf,”which is a tandem cell with a perovskite/silicon solar cell,shows a solar-to-hydrogen conversion efficiency of 6.2%for unbiased solar water *** reveal significant advances in the photoactivity of TANF/BiVO_(4)/In_(2)O_(3)NRs from the tailored nanostructure and band structure for charge dynamics.

关键词： bismuth vanadate heterojunction indium oxide nanostructure photoelectrochemical water splitting

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Preparation of In_2O_3-Sr_2RuErO_6 Composite Ceramics by the Spark Plasma Sintering and Their Thermoelectric Performance

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Journal of Materials Science & Technology 2011年第12期27卷 1165-1168页

作者： Bo Cheng Yuanhua Lin Jinle Lan Yong Liu Cewen Nan State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and Engineering Tsinghua University Beijing 100084 China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 Ch.ina

Inl.9aZn0.03Ge0.0303 and Sr2RuEr06 composite ceramics have been prepared by the spark plasma sintering （SPS） technique. Microstructure studies show that the Sr2RuErO6 phases are randomly dispersed in the In1.94Zn0.03Ge0.03O3 matrix. The results show that the Seebeck coefficient increases with increasing the amount of Sr2RuErO6, while the thermal conductivity of the composite samples is lower than that of the Inl.9aZno.03Ge0.03O3 ceramic. The thermal conductivity of the 7 vol.% Sr2RuErO6 sample can decrease to 2.15 W.m-1.K-1 at 973 K, and the evaluated maximum ZT value is 0.23 for 3 vol.% Sr2RuErO6 samples at 973 K, which makes them promising materials for the thermoelectric devices.

关键词： indium oxide Double perovskite Thermoelectric performance Composite

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