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催化臭氧氧化工艺中催化剂应用的研究进展
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作者 王筱月 李亮 +2 位作者 张思濡 刘博康 赵军凯 《净水技术》 CAS 2023年第12期8-16,43,共10页
催化臭氧氧化法作为一种高级氧化技术,在难生物降解有机废水的深度处理领域具有良好的应用前景。催化剂可以促进臭氧分解并生成活性自由基,增强有机污染物的降解速率和矿化程度,是影响催化臭氧氧化法效能的关键因素。文章阐述了均相和... 催化臭氧氧化法作为一种高级氧化技术,在难生物降解有机废水的深度处理领域具有良好的应用前景。催化剂可以促进臭氧分解并生成活性自由基,增强有机污染物的降解速率和矿化程度,是影响催化臭氧氧化法效能的关键因素。文章阐述了均相和非均相催化臭氧法的反应机理,在此基础上梳理了近年来催化臭氧氧化工艺中常用催化剂的分类和研究进展,包括金属离子、金属氧化物、碳基材料、矿物质材料等,并对其在工业废水深度处理上的应用进行总结,探讨了该技术目前存在的问题,并展望了未来研究方向及应用前景,包括新型高效催化剂的制备、复杂难降解废水臭氧化预处理、二级生化处理出水的深度处理等。 展开更多
关键词 催化臭氧法 负载型催化剂 金属型催化剂 催化机理 难生物降解废水
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合成宽或双分子量分布的聚烯烃的催化剂及制备方法
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《塑料工业》 CAS CSCD 北大核心 2000年第5期49-49,共1页
关键词 聚烯烃 催化剂 制备方法 负载型 金属催化剂 负载过渡金属 非茂金属型催化剂 组成
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溴素法催化合成十溴二苯醚及其精制新工艺研究 被引量:4
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作者 杨泽慧 陈声宗 +2 位作者 叶姣 欧春艳 邹武德 《化学世界》 CAS CSCD 北大核心 2002年第3期150-152,共3页
采用均匀试验设计和单纯形寻优法对溴素法合成十溴二苯醚的工艺条件进行了研究 ,在新型金属型催化剂 HD- 0 1存在的条件下 ,当二苯醚与溴的摩尔比为 1∶ 3 0 ,催化剂用量为二苯醚质量的 2 0 % ,二苯醚的滴加温度为 3 0°C,回流反应... 采用均匀试验设计和单纯形寻优法对溴素法合成十溴二苯醚的工艺条件进行了研究 ,在新型金属型催化剂 HD- 0 1存在的条件下 ,当二苯醚与溴的摩尔比为 1∶ 3 0 ,催化剂用量为二苯醚质量的 2 0 % ,二苯醚的滴加温度为 3 0°C,回流反应时间为 5 .5 h,反应达到优化 ,十溴二苯醚收率为 95 .2 %。同时针对国内生产存在的问题 。 展开更多
关键词 二苯醚 十溴二苯醚 金属型催化剂 HD-01 纯化 溴素法 精制工艺 阻燃剂
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氯化溴法催化合成十溴二苯醚工艺研究 被引量:2
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作者 杨泽慧 陈声宗 +2 位作者 李文生 张竞 李瑞生 《精细化工》 EI CAS CSCD 北大核心 2002年第1期42-44,共3页
采用均匀实验设计和单纯形寻优法得出氯化溴法催化合成十溴二苯醚最优工艺条件 :在金属型催化剂HD2 0 0 1存在的条件下 ,n(C12 H10 O)∶n(BrCl) =1∶13 ,m(HD2 0 0 1)∶m(C12 H10 O)=1∶10 ,二苯醚滴加温度为 12℃ ,回流反应时间为 7 2... 采用均匀实验设计和单纯形寻优法得出氯化溴法催化合成十溴二苯醚最优工艺条件 :在金属型催化剂HD2 0 0 1存在的条件下 ,n(C12 H10 O)∶n(BrCl) =1∶13 ,m(HD2 0 0 1)∶m(C12 H10 O)=1∶10 ,二苯醚滴加温度为 12℃ ,回流反应时间为 7 2h ,在此条件下 ,十溴二苯醚收率达97 1% ;催化剂HD2 0 0 1克服了传统催化剂易潮解、吸水 ,不易储存、运输的缺点 ,更适于工业化生产 ;使用二甲苯这种经济易得的溶剂 。 展开更多
关键词 氯化溴 二苯醚 十溴二苯醚 金属型催化剂 氯化溴法 催化合成
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非能动氢气复合装置的开发设计 被引量:6
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作者 朱敏 王少波 《舰船科学技术》 北大核心 2006年第2期38-41,共4页
非能动氢气复合装置是核电站发生严重事故时用于消除安全壳内氢气的安全设备之一。我们提出采用催化消氢的原理,利用新研制的全金属型催化剂消除氢气,并利用反应热,以温度梯度为推动力,非能动地进行反应。该方法不仅适用于核电站超设计... 非能动氢气复合装置是核电站发生严重事故时用于消除安全壳内氢气的安全设备之一。我们提出采用催化消氢的原理,利用新研制的全金属型催化剂消除氢气,并利用反应热,以温度梯度为推动力,非能动地进行反应。该方法不仅适用于核电站超设计基准事故下消氢,还适用于设计基准事故下的消氢。其他场合下的消氢也可选用。 展开更多
关键词 核电站严重事故 消氢 金属型催化剂 非能动
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Catalytic removal of volatile organic compounds using ordered porous transition metal oxide and supported noble metal catalysts 被引量:27
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作者 刘雨溪 邓积光 +2 位作者 谢少华 王治伟 戴洪兴 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第8期1193-1205,共13页
Most of volatile organic compounds (VOCs) are harmful to the atmosphere and human health. Cata‐lytic combustion is an effective way to eliminate VOCs. The key issue is the availability of high per‐formance catalys... Most of volatile organic compounds (VOCs) are harmful to the atmosphere and human health. Cata‐lytic combustion is an effective way to eliminate VOCs. The key issue is the availability of high per‐formance catalysts. Many catalysts including transition metal oxides, mixed metal oxides, and sup‐ported noble metals have been developed. Among these catalysts, the porous ones attract much attention. In this review, we focus on recent advances in the synthesis of ordered mesoporous and macroporous transition metal oxides, perovskites, and supported noble metal catalysts and their catalytic oxidation of VOCs. The porous catalysts outperformed their bulk counterparts. This excel‐lent catalytic performance was due to their high surface areas, high concentration of adsorbed oxy‐gen species, low temperature reducibility, strong interaction between noble metal and support and highly dispersed noble metal nanoparticles and unique porous structures. Catalytic oxidation of carbon monoxide over typical catalysts was also discussed. We made conclusive remarks and pro‐posed future work for the removal of VOCs. 展开更多
关键词 Volatile organic compound Catalytic combustion Porous transition metal oxide Perovskite-type oxide Supported noble metal catalyst
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Sodium-treated sepiolite-supported transition metal(Cu,Fe,Ni,Mn,or Co)catalysts for HCHO oxidation 被引量:5
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作者 Ning Dong Qing Ye +3 位作者 Mengyue Chen Shuiyuan Cheng Tianfang Kang Hongxing Dai 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第11期1734-1744,共11页
Sodium-treated sepiolite(Na Sep)-supported transition metal catalysts(TM/Na Sep;TM = Cu, Fe, Ni, Mn, and Co) were synthesized via a rotary evaporation method. Physicochemical properties of the as-synthesized samples w... Sodium-treated sepiolite(Na Sep)-supported transition metal catalysts(TM/Na Sep;TM = Cu, Fe, Ni, Mn, and Co) were synthesized via a rotary evaporation method. Physicochemical properties of the as-synthesized samples were characterized by means of various techniques, and their catalytic activities for HCHO(0.2%) oxidation were evaluated. Among the samples, Cu/Na Sep exhibited superior performance, and complete HCHO conversion was achieved at 100 ℃(GHSV = 240000 m L/(g·h)). Additionally, the sample retained good catalytic activity during a 42 h stability test. A number of factors, including elevated acidity, the abundance of oxygen species, and favorable low-temperature reducibility, were responsible for the excellent catalytic activity of Cu/Na Sep. According to the results of the in-situ DRIFTS characterization, the HCHO oxidation mechanism was as follows:(i) HCHO was rapidly decomposed into dioxymethylene(DOM) species on the Cu/Na Sep surface;(ii) DOM was then immediately converted to formate species;(iii) the resultant formate species were further oxidized to carbonates;(iv) the carbonate species were eventually converted to CO2 and H2O. 展开更多
关键词 Sodium-treated sepiolite Transition metal loading Supported transition metal catalyst Volatile organic compound HCHO oxidation
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Coordination environment of active sites and their effect on catalytic performance of heterogeneous catalysts 被引量:7
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作者 Chunpeng Wang Zhe Wang +2 位作者 Shanjun Mao Zhirong Chen Yong Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第4期928-955,共28页
The structural complexity of supported metal catalysts,playing significant role in a wide range of chemical technologies,have prevented us from deeply understanding their catalytic mechanisms at atomic level.A fundame... The structural complexity of supported metal catalysts,playing significant role in a wide range of chemical technologies,have prevented us from deeply understanding their catalytic mechanisms at atomic level.A fundamental understanding of the nature of active sites and structure–performance relationship of supported metal catalysts from a comprehensive view will open up numerous new opportunities for the development of advanced catalysts to address the global challenges in energy conversion and environmental protection.This review surveys the effects of multiple factors,including the metal size,shape,support,alloy and ligand modifier,on the coordinated environment of active center and further their influence on the catalytic reactions,aiming to provide guidance for the design of industrialized heterogeneous catalysts with extraordinary performance.Subsequently,the key structure characterization techniques in determining the coordination structure of active metal sites,especially the dynamic coordination structure change under the reaction condition,are well summarized.A brief summary is finally provided together with personal perspectives on the further development in the field of heterogeneous metal catalysts. 展开更多
关键词 Heterogeneous catalysis Supported catalyst Coordination environment Metal catalyst In‐situ characterization
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Sustainable synthesis of supported metal nanocatalysts for electrochemical hydrogen evolution 被引量:5
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作者 Qian Chen Yao Nie +3 位作者 Mei Ming Guangyin Fan Yun Zhang Jin-Song Hu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第12期1791-1811,共21页
Among the various types of heterogeneous catalysts,supported metal nanocatalysts(SMNCs)have attracted widespread interest in chemistry and materials science,due to their advantageous features,such as high efficiency,s... Among the various types of heterogeneous catalysts,supported metal nanocatalysts(SMNCs)have attracted widespread interest in chemistry and materials science,due to their advantageous features,such as high efficiency,stability,and reusability for catalytic reactions.However,to obtain well-defined SMNCs and inhibit nanoparticle aggregation,traditional approaches generally involve numerous organic reagents,complex steps,and specialized equipment,thus hindering the practical and large-scale synthesis of SMNCs.In this review,we summarize green and sustainable synthetic methodologies for the assembly of SMNCs,including low temperature pyrolysis and solid-state,surfactant-and reductant-free,and ionic liquid assisted syntheses.The conventional application of SMNCs for electrochemical hydrogen evolution and the corresponding achievements are subsequently discussed.Finally,future perspectives toward the sustainable production of SMNCs are presented. 展开更多
关键词 Supported metal nanocrystals Sustainable production Green synthesis ELECTROCATALYSIS Hydrogen evolution reaction
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Perovskite LaFeO_3 supported bi-metal catalyst for syngas methanation 被引量:6
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作者 Hong Wang Yuzhen Fang +1 位作者 Yuan Liu Xue Bai 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2012年第6期745-752,共8页
LaFeO3 perovskite supported Ni and Ni-Fe catalysts were prepared and applied to methanation reaction of syngas. Two preparation methods were employed. One was one-step citrate complexing method, and the other was a tw... LaFeO3 perovskite supported Ni and Ni-Fe catalysts were prepared and applied to methanation reaction of syngas. Two preparation methods were employed. One was one-step citrate complexing method, and the other was a two step method using citrate complexing method to produce LaFeO3 and followed by loading nickel oxide on it with impregnation. The structure evolution of the sample as prepared was investigated by XRD, TPR and TEM techniques. For the former, the chemical composites of the calcined sample are NiO-Fe2O3/LaFe1-xNixO3. After reduction and reaction of CO methanation, its composites convert to Fe-Ni@Ni/LaFeO3-La2O2CO3, in which Fe-Ni@Ni is metal particles in nano-size composed of nickel core and Fe-Ni alloy shell. For the latter, the chemical composites of the calcined sample are NiO/LaFeO3; and after reduction and reaction of CO methanation, its chemical composites change to Ni/LaFeO3. Ni/LaFeO3 catalyst is a little more active, while Fe-Ni@Ni/LaFeO3-La2O2CO3 is much more stable and shows very good resistance to carbon deposition. In this work it is aimed to show that the structure and composites of the catalysts can be tailored using perovskite-type oxide as precursor with different preparing method or preparing condition. Therefore, it is a promising route to prepare supported bi-metal catalysts in nano-size for a lot of metals with desired catalytic performances. 展开更多
关键词 PEROVSKITE bi-metal NICKEL IRON SYNGAS METHANATION
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Highly Dispersed Pt Species with Excellent Stability and Catalytic Performance by Reducing a Perovskite-Type Oxide Precursor for CO Oxidation 被引量:2
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作者 Chunyu Fang Huixian Zhong +4 位作者 Ying Wei Jiaming Wang Siran Zhang Lihong Zhang Yuan Liu 《Transactions of Tianjin University》 EI CAS 2018年第6期547-554,共8页
A new scheme for the preparation of highly dispersed precious metal catalysts is proposed in this work. Samples of LaCol-xPtxO3/SiO2 (x = 0.03, 0.05, 0.07, 0.09, and 0.10) were prepared through a simple method of ci... A new scheme for the preparation of highly dispersed precious metal catalysts is proposed in this work. Samples of LaCol-xPtxO3/SiO2 (x = 0.03, 0.05, 0.07, 0.09, and 0.10) were prepared through a simple method of citrate acid complexa-tion combined with impregnation. In a nanocrystallite of LaCOl-xPtxO3, ions of lanthanum, cobalt, and platinum are evenly mixed at the atomic level and confined within the nanocrystallite. In the reduction process, platinum ions were reduced and migrated onto the surface of the nanocrystallite, and the platinum should be highly dispersed owing to the even mixing of the platinum ions in the precursor. When x = 0.05 or lower, the highest dispersion of Pt could be achieved. The highly dispersed Pt is stable, because of the strong interaction between Pt atoms and the support. The catalysts were characterized by BET surface area, temperature-programmed reduction, X-ray diffraction, transmission electron microscopy, CO temperature-programmed desorption, and turnover frequency. Compared with general precious metal Pt catalysts, the LaCo0.95Pt0.05O3/ SiO2 catalyst exhibited better activity for CO oxidation, and it maintained stability at a high temperature of 400 ℃ for 250 h with complete CO conversion. 展开更多
关键词 High dispersion Perovskite-type oxide PLATINUM Carbon monoxide Catalytic oxidation
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n-Decane hydro-conversion over bi-and tri-metallic Al-HMS catalyst in a mini-reactor
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作者 Mahdi Abdi-Khanghah Mostafa Adelizadeh +1 位作者 Zahra Naserzadeh Zhi'en Zhang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第6期1330-1339,共10页
Bi-metallic(Pt–Sn and Sn–Ni) and tri-metallic(Pt–Sn–Ni) catalysts,supported on Al-containing hexagonal mesoporous silica(Al-HMS)(Si/Al = 20) materials,were synthesized.N_2 adsorption–desorption,X-ray diffraction(... Bi-metallic(Pt–Sn and Sn–Ni) and tri-metallic(Pt–Sn–Ni) catalysts,supported on Al-containing hexagonal mesoporous silica(Al-HMS)(Si/Al = 20) materials,were synthesized.N_2 adsorption–desorption,X-ray diffraction(XRD),Brunauer–Emmett–Teller(BET) test,and temperature programed desorption(NH3-TPD)were used to characterize physicochemical characteristics and textural properties of the Al-HMS catalysts.Catalytic performances on hydro-cracking of n-decane at different reaction conditions were studied in a microreactor.Comparison between Pt–Sn,Sn–Ni and Pt–Sn–Ni catalyst under different hydro-cracking conditions was made.The experimental results indicate that the proper balance between the acid and metal functions is the key in synthesizing a catalyst with a better performance in hydro-cracking.Tri-metallic catalyst exhibits the best catalytic performance in n-decane hydro-cracking than two bi-metallic catalysts. 展开更多
关键词 Catalytic hydro cracking Bi-and tri-metallic mesoporous catalyst Al-HMS N-DECANE Mini-reactor
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Efficient Degradation of Cellulose in Its Homogeneously Aqueous Solution over 3D Metal-Organic Framework/Graphene Hydrogel Catalyst
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作者 Pei Huang Li-feng Yan 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第6期742-748,I0002,共8页
Catalytic degradation of cellulose to chemicals is an attracting topic today for the conver- sion of biomass, and the development of novel catalysts is a key point. Since metal-organic frameworks (MOFs) possess unif... Catalytic degradation of cellulose to chemicals is an attracting topic today for the conver- sion of biomass, and the development of novel catalysts is a key point. Since metal-organic frameworks (MOFs) possess uniform, continuous, and permeable channels, they are valu- able candidate as catalysts. Here, a new 3D MOF/graphene catalyst was prepared by in situ growth of the zeolitic imidazolate frameworks (ZIF-8) nanoparticles inside the pore of an as-formed 3D reduced graphene oxide (rGO) hydrogel. The ZIF-8/rGO nanocomposite owns both micropores and mesopores with large specific surface area and plenty of acids sites, which is an idea catalyst for biomass degradation. Cellulose was dissolved in allmline aqueous solution at first, and then it was degraded efficiently over the new catalyst under hydrothermal condition. The conversion reaches 100% while the main products are formic acid with a maximum yield of 93.66%. In addition, the catalyst can be reused with high activity. 展开更多
关键词 GRAPHENE Metal-Organic framework CELLULOSE CATALYST Formic acid
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Iron catalyzed Michael addition: Chloroferrate ionic liquids as efficient catalysts under microwave conditions 被引量:2
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作者 VASILOIU Maria GAERTNER Peter BICA Katharina 《Science China Chemistry》 SCIE EI CAS 2012年第8期1614-1619,共6页
The iron containing ionic liquid 1-butyl-3-methylimidazolium tetrachloroferrate ([C4mim]C1/FeCl3; Z = 0.5) proved to be an efficient catalyst for the solvent-free metal catalyzed Michael addition of β-keto esters a... The iron containing ionic liquid 1-butyl-3-methylimidazolium tetrachloroferrate ([C4mim]C1/FeCl3; Z = 0.5) proved to be an efficient catalyst for the solvent-free metal catalyzed Michael addition of β-keto esters and enones. Due to the ionic structure of the catalyst, a significant acceleration of the reaction rate was observed under microwave conditions. Furthermore, recycling of the ionic liquid catalyst could be performed after simply distilling off the products. 展开更多
关键词 ionic liquids IRON CATALYSIS michael addition lewis acid microwave chemistry
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Easily fabricated and recyclable Pd&Cu@Al catalyst for gram-scale phosphine-free Heck reactions with high TON 被引量:3
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作者 Dongliang Zhang Zheng Wei Lei Yu 《Science Bulletin》 SCIE EI CAS CSCD 2017年第19期1325-1330,共6页
A unique Pd&Cu@Al catalyst was easily fabricated just by immersing commercial aluminum foil in a mixed xylene solution of PdC12 and CuCl2. The catalyst fabrication process led to aluminum oxide coatings in situ, whic... A unique Pd&Cu@Al catalyst was easily fabricated just by immersing commercial aluminum foil in a mixed xylene solution of PdC12 and CuCl2. The catalyst fabrication process led to aluminum oxide coatings in situ, which supported the metal nanoparticles and enhanced their catalytic activities for the phosphine-free Heck reaction of awl halides and styrenes with high turnover number (TON) up to 3.9×10^5. The reaction can be scaled up to at least 100 mmol and has been applied in modification of drug Lapatinib's intermediate with low metal residue. This novel catalyst is of good application potential in industrial production because it was extremely easy to be recycled, in regardless of the generation of the insoluble impurities or tars during the reaction processes. 展开更多
关键词 Catalyst recoveryPalladiumnanoparticlesAluminum oxidePhosphine-freeSustainable chemistryHeck reaction
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Development of Novel Supported Gold Catalysts: A Materials Perspective 被引量:9
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作者 Zhen Ma Sheng Dai 《Nano Research》 SCIE EI CAS CSCD 2011年第1期3-32,共30页
Since Haruta et al. discovered that small gold nanoparticles finely dispersed on certain metal oxide supports can exhibit surprisingly high activity in CO oxidation below room temperature, heterogeneous catalysis by s... Since Haruta et al. discovered that small gold nanoparticles finely dispersed on certain metal oxide supports can exhibit surprisingly high activity in CO oxidation below room temperature, heterogeneous catalysis by supported gold nanoparticles has attracted tremendous attention. The majority of publications deal with the preparation and characterization of conventional gold catalysts (e.g., Au/TiO2), the use of gold catalysts in various catalytic reactions, as well as elucidation of the nature of the active sites and reaction mechanisms. In this overview, we highlight the development of novel supported gold catalysts from a materials perspective. Examples, mostly from those reported by our group, are given concerning the development of simple gold catalysts with single metal-support interfaces and heterostructured gold catalysts with complicated interfacial structures. Catalysts in the first category include active Au/SiO2 and Au/metal phosphate catalysts, and those in the second category include catalysts prepared by pre-modification of supports before loading gold, by post-modification of supported gold catalysts, or by simultaneous dispersion of gold and an inorganic component onto a support. CO oxidation has generally been employed as a probe reaction to screen the activities of these catalysts. These novel gold catalysts not only provide possibilities for applied catalysis, but also furnish grounds for fundamental research. 展开更多
关键词 GOLD NANOPARTICLES catalyst design catalyst support FUNCTIONALIZATION PROMOTION CO oxidation
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