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Advances in Noble metal-Decorated metal Oxide Nanomaterials for Chemiresistive Gas Sensors:Overview

纳微快报：英文版 2023年第6期15卷 353-427页

作者： Li‑Yuan Zhu Lang‑Xi Ou Li‑Wen Mao Xue‑Yan Wu Yi‑Ping Liu Hong‑Liang Lu State Key Laboratory of ASIC and System Shanghai Institute of Intelligent Electronics and SystemsSchool of MicroelectronicsFudan UniversityShanghai 200433People’s Republic of China School of Opto‑Electronic Information and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093People’s Republic of China State Key Laboratory of metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Highly sensitive gas sensors with remarkably low detection limits are attractive for diverse practical application fields including real-time environmental monitoring,exhaled breath diagnosis,and food freshness analysis.Among various chemiresistive sensing materials,Noble metal-decorated semiconducting metal oxides(SMOs)have currently aroused extensive attention by virtue of the unique electronic and catalytic properties of Noble metals.This review highlights the research progress on the designs and applications of different Noble metal-decorated SMOs with diverse nanostructures(e.g.,nanoparticles,nanowires,nanorods,nanosheets,nanoflowers,and microspheres)for high-performance gas sensors with higher response,faster response/recovery speed,lower operating temperature,and ultra-low detection limits.The key topics include Pt,Pd,Au,other Noble metals(e.g.,Ag,Ru,and Rh.),and bimetals-decorated SMOs containing ZnO,SnO_(2),WO_(3),other SMOs(e.g.,In_(2)O_(3),Fe_(2)O_(3),and CuO),and heterostructured SMOs.In addition to conventional devices,the innovative applications like photo-assisted room temperature gas sensors and mechanically flexible smart wearable devices are also discussed.Moreover,the relevant mechanisms for the sensing performance improvement caused by Noble metal decoration,including the electronic sensitization effect and the chemical sensitization effect,have also been summarized in detail.Finally,major challenges and future perspectives towards Noble metal-decorated SMOs-based chemiresistive gas sensors are proposed.

关键词： Noble metal Bimetal Semiconducting metal oxide Chemiresistive gas sensor Electronic sensitization Chemical sensitization

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Atomic level engineering of Noble metal nanocrystals for energy conversion catalysis

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Journal of Energy Chemistry 2021年第12期30卷 604-624,I0014页

作者： Yancai Yao Shiqi Wang Zhijun Li Yuen Wua School of Chemistry and Materials Science iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026AnhuiChina School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Joint International Research Laboratory of Advanced Chemical Catalytic Materials&Surface Science College of Chemistry and Chemical EngineeringNortheast Petroleum UniversityDaqing 163318HeilongjiangChina

It is commonly known that the performance of electrocatalysts is largely influenced by the size,morphology,composition,and crystalline phase of Noble metal nanocrystals.However,the limited reserves and high cost of Noble metals largely restrict their industrial applications.Along with the development of characterization techniques,theoretical calculations,and advanced material synthesis methods,modulating the electrocatalytic properties of Noble metal nanocrystals at the atomic scale(e.g.,monolayer/sub-monolayer,single-atom alloy,ultrafine structure)has been flooding out.Engineering Noble metal nanocrystals at the atomic level could not only immensely improve the Noble metal atom utilization efficiency and lower the cost,but also boost the catalytic performance.In this review,we summarize the recent advanced progresses of regulating the Noble metal nanocrystals at the atomic scale towards energy conversion application.Then,the challenges and perspectives of designing Noble metal nanocrystals at the atomic scale in the future are discussed and considered.It is expected that this review will inspire scientists to further study precious metal-based materials for energy-oriented catalysis.

关键词： Noble metal Atomic regulation Synthetic strategy Electrocatalysis

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Strain modulation of phase transformation of Noble metal nanomaterials

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InfoMat 2020年第4期2卷 715-734页

作者： Tong Wu Mingzi Sun Bolong Huang Department of Applied Biology and Chemical Technology The Hong KongPolytechnic UniversityHung HomKowloonHong Kong SARChina

Noble metals have been extensively studied owing to their high chemical stability and outstanding catalytic properties in various important reactions.However,their large-scale application of Noble metals is still challenged by their high expense and scarcity on the earth,as well as the yet insufficient activity to give a satisfying performance.For decades,enormous research efforts have been devoted to the nanoengineering of Noble metal nanocrystals,such as the size-,composition-,shape-,and/or morphology-controlled syntheses,and impressive advances have been achieved.Meanwhile,the discovery that the crystal structure of Noble metal nanocrystals also has a significant impact on their properties opened a new pathway that modulates the crystal phases of Noble metals to achieve better properties.Among the feasible methods for crystal phase transformation,the presence of strain is not negligible.Strain generally has two roles:the driving force of the phase transformation and/or the origin of the distinct properties of the new crystal structure.Strain effect on Noble metals has also been extensively studied due to its capability of fine-tuning the surface catalytic activity.Therefore,combining the two hot research trends together,a possible research pathway is emerging.That is,utilizing the potential synergistic effect between novel crystal phases and the subsequent lattice strain to boost the performance of Noble metal nanocrystal even further.Herein,a brief summary of the currently discovered Noble metal phases and strain effect and the introduction of strain related phase modulation techniques along with the catalytic applications will be presented.Finally,a brief conclusion and future perspective is given.

关键词： nanocrystal Noble metal phase modulation strain effect

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Non-symmetric hybrids of Noble metal-semiconductor:Interplay of nanoparticles and nanostructures in formation dynamics and plasmonic applications

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Progress in Natural Science:Materials International 2017年第2期27卷 157-168页

作者： Yinghui Sun Xianzhong Yang Haofei Zhao Rongming Wang Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and PhysicsUniversity of Science and Technology Beijing Beijing National Laboratory for Condensed Matter Physics Beijing Key Laboratory for Nanomaterials and NanodevicesInstitute of PhysicsChinese Academy of Sciences

Noble metal-semiconductor hybrids have been employed as fundamental structures in modern technologies. In these hybrids, their cooperative multiple functions attract much attention in recent years because of the interplay of nanoparticles and nanostructures. In this review, we summarize the interplay of nanoparticles and nanostructures in specific kinds of Noble metal-semiconductor hybrids, termed as non-symmetric hybrids of Noble metal-semiconductor. It particularly refers to metal nanoparticles(or semiconducting quantum dots) at 1-dimensinal(1D) and 2-dimensional(2D) semiconductor(or metal) nanostructures, in contrast to the core/shell and heterodimer nanostructures. First, we discuss the formation dynamics, especially in chemical growth and assembly as well as physical coating and deposition, of non-symmetric Noble metal-semiconductor hybrids with nanoparticles on nanostructures. Second, we introduce the plasmon-related applications of these hybrids in heterogeneous catalysis, optoelectronic or photovoltaic devices, all-optical devices, and surface detection or modulation. This review not only provides a comprehensive understanding of the formation mechanisms of the non-symmetric metal-semiconductor hybrid nanostructures, but also may inspire new ideas of novel functional devices and applications based on these systems.

关键词： Noble metal Semiconductor Nanoparticle Nanostructure Hybrid

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Two-dimensional Noble metal Nanomaterials for Electrocatalysis

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Chemical Research in Chinese Universities 2020年第4期36卷 597-610页

作者： SUN Rongbo GUO Wenxin HAN Xiao HONG Xun Center of Advanced Nanocatalysis(CAN) Department of Applied ChemistryHefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026P.R.China

Two-dimensional Noble metal nanomaterials(2D NMNs)are widely used as electrocatalyst.In recent years the researchers have focused on the svnthesis of 2D NMNs at the atomic scale,and realize the improvement of electrocatalytic performance through further structural modification to reduce the usage of Noble metals.Herein,we systematically introduce the synthesis methods of 2D NMNs categorized by element type.Subsequently,the catalytic applications toward a variety of electrocatalytic reactions are described in detail including the hydrogen evolution reaction(HER),oxygen reduction reaction(ORR),oxygen evolution reaction(OER)and COz reduction reaction(CO,RR).Finally,the potential opportunities and remaining challenges in this emerging research area are proposed.

关键词： Two-dimensional nanomaterial Noble metal Electrocatalysis

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Shape/size controlling syntheses, properties and applications of two-dimensional Noble metal nanocrystals

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Frontiers of Chemical Science and Engineering 2016年第3期10卷 360-382页

作者： Baozhen An Mingjie Li Jialin Wang Chaoxu Li Bioengineering Department College of Chemical Engineering Qingdao University of Science & Technology Qingdao 266042 China CAS Key Laboratory of Bio-based Materials Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101 China

Two dimensional （2D） nanocrystals of Noble metals （e.g., Au, Ag, Pt） often have unique structural and environmental properties which make them useful for applications in electronics, optics, sensors and biomedi- cines. In recent years, there has been a focus on discovering the fundamental mechanisms which govern the synthesis of the diverse geometries of these 2D metal nanocrystals （e.g., shapes, thickness, and lateral sizes）. This has resulted in being able to better control the properties of these 2D structures for specific applications. In this review, a brief historical survey of the intrinsic anisotropic properties and quantum size effects of 2D Noble metal nanocrystals is given and then a summary of synthetic approaches to control their shapes and sizes is presented. The unique properties and fascinating applica- tions of these nanocrystals are also discussed.

关键词： two-dimension Noble metal nanocrystal surface plasmon controllable synthesis

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Rational design and synthesis of noble-metal nanoframes for catalytic and photonic applications

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National Science Review 2016年第4期3卷 520-533页

作者： Xue Wang Aleksey Ruditskiy Younan Xia The Wallace H.Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University State Key Laboratory for Oxo Synthesis and Selective Oxidation Suzhou Research InstituteLanzhou Institute of Chemical PhysicsChinese Academy of Sciences School of Chemistry and Biochemistry Georgia Institute of Technology

Nanoframes are unique for their 3D,highly open architecture.When made of Noble metals,they are atractive for use as heterogeneous catalysts because of their large speciic surface areas,high densities of catalytically active sites and low vulnerability toward sintering.hey promise to enhance the catalytic activity and durability while reducing the material loading and cost.For nanoframes composed of Au and/or Ag,they also exhibit highly tunable plasmonic properties similar to those of nanorods.his article presents a brief account of recent progress in the design,synthesis and utilization of noble-metal nanoframes.We start with a discussion of the synthetic strategies,including those involving site-selected deposition and etching,as well as dealloying of both hollow and solid nanocrystals.We then highlight some of the applications enabled by noble-metal nanoframes.Finally,we discuss the challenges and trends with regard to future development.

关键词： Noble metal nanoframe nanomaterial synthesis catalysis plasmonics

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Three-dimensional noble-metal nanostructure: A new kind of substrate for sensitive, uniform, and reproducible surface-enhanced Raman scattering

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Chinese Physics B 2014年第8期23卷 13-22页

作者：田翠锋尤红军方吉祥 State Key Laboratory for Mechanical Behavior of Materials School of ScienceXi’an Jiaotong University Department of Physics Shanxi Datong University

Surface-enhanced Raman spectroscopy （SERS） is a powerful vibrational spectroscopy technique for highly sensitive structural detection of low concentration analyte. The SERS activities largely depend on the topography of the substrate. In this review, we summarize the recent progress in SERS substrate, especially focusing on the three-dimensional （3D） noble-metal substrate with hierarchical nanostructure. Firstly, we introduce the background and general mechanism of 3D hierarchical SERS nanostructures. Then, a systematic overview on the fabrication, growth mechanism, and SERS property of various noble-metal substrates with 3D hierarchical nanostructures is presented. Finally, the applications of 3D hierarchical nanostructures as SERS substrates in many fields are discussed.

关键词： ksurface-enhanced Raman spectroscopy Noble metal hierarchical nanostructure FDTD

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Does Noble metal modification improve the photocatalytic activity of BiOCl?

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Progress in Natural Science:Materials International 2013年第3期23卷 286-293页

作者： Liang Kong Zheng Jiang Henry H.-C.Lai Tiancun Xiao Peter P.Edwards Department of Chemistry Inorganic Chemistry LaboratoryUniversity of OxfordUK Environment and Sustainability Institute University of ExeterCornwall CampusPenrynCornwall TR10 9EZUK

Noble metal-surface-deposited BiOCl photocatalysts were prepared through photo-deposition and used for photodecomposition of Rhodamine B(RhB).The received materials were characterised using X-ray photoemission spectroscopy(XPS),UV-vis diffuse reflectance spectroscopy(UV-vis DRS),and X-ray diffraction(XRD) to understand the influence of surface deposited Noble metals.The results showed that the Noble metal species on the surface of BiOCl are in metallic state,which also brought about enhanced light absorption in broad UV-vis region due to plasmonic effects induced by the surfacedeposited Noble metal species.All the samples showed good activity in photodecomposition of RhB under UV-light irradiation,but only Ag/BiOCl was more active than bulk BiOCl.The mechanism of the different reactivity of these noble-metal modified BiOCl was tentatively proposed based on the band structure and the interactions between Noble metals and the BiOCl.

关键词： Photocatalysis BiOCl Noble metal Rhodamine B Plasmonic effect

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Noble metal-Doped In_2O_3 for Enhancing Response to H_2

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稀有金属材料与工程 2006年第A03期35卷 136-139页

作者： Jiaqiang Xu Xiaohua Wang Jianian Shen College of Materials and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou 450002 China Institute of Materials Shanghai University Shanghai 200072 China

Nanocrystalline In_2O_3 was synthesized through a controllable solvothermal process in one-step at 210℃for 24 h. Gas sensing properties were tested by mixing gas in air in static state.At 268.5℃,the nanocrystal showed high sensitivity to LPG but lower sensitivity to H_2 and CO.In order to enhance the sensitivities to H_2 and CO,0.5 mass % Au and Pd were doped by an impregnation process.The sensitivities to H_2 and CO were increased under different working temperature.Au-doped In_2O_3 was superior to Pd-doped In_2O_3 whatever to H_2 or CO;the sensitivity was increased with the increase of working temperature;gas sensing properties to H_2 overmatched to CO.

关键词： solvothermal process indium oxide Noble metal H2 sensor

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