检索结果-内蒙古大学图书馆

Manipulation of the PdAu-PdAuO_(x)interface on Pd-Au bimetallic catalysts for the direct synthesis of hydrogen peroxide

引用

Chinese chemical Letters 2023年第11期34卷 195-201页

作者： Jixuan Zhang Pengfei Tian Aihao Xu Like Ouyang Zixu Yang Jing Xu State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory of Pressure Systems and Safety Ministry of EducationEast China University of Science and TechnologyShanghai 200237China Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004China College of Chemical Engineering Sichuan UniversityChengdu 610065China

Direct synthesis of H_(2)O_(2)from H_(2) and O_(2)via heterogeneous catalysis is an environmentally friendly and atomically economic alternative to the traditional anthraquinone oxidation(AO)*** the electronic and geometric structures of the active metals to break the current limitations of hydrogenation rate and H_(2)O_(2)selectivity is a promising and challenging *** this study,a series of Pd-Au bimetallic catalysts supported on TiO_(2)with a metal loading of 3.0 wt%and a constant Pd/Au molar ratio(Pd:Au=2:1)were *** catalysts were reduced in H_(2) at different temperatures(473,573 and 673 K),and their catalytic activity for the direct H_(2)O_(2)synthesis were evaluated at 283 K and 0.1MPa.H_(2) reduced Pd-Au catalysts exhibited superior performance in direct H_(2)O_(2)*** maximum H_(2)O_(2)selectivity of 87.7%and H_(2)O_(2)yield of 3116.4 mmol h^(−1) gPd^(−1) were achieved over the Pd_(2.0)Au_(1.0)-573 catalyst with a H_(2) conversion of 12.8%.The tailored local chemical environment caused by H_(2) reduction creates a balanced ratio of Pd0 and PdO_(x) sites,thus improving the selectivity towards H_(2)O_(2).This work developed an effective strategy for fabrication of highly active and stable Pd-based H_(2)O_(2)synthesis catalysts with high H_(2)O_(2)yield.

关键词： H_(2)O_(2)synthesis Bimetallic catalysts Palladium particle size Pd^(0)/Pd^(2+)ratio Structure-performance relationship

来源：评论

学校读者我要写书评

暂无评论

Investigation of surface effect in amorphous catalytic active layer for boosted water and seawater oxidation

引用

Journal of Energy Chemistry 2025年第4期103卷 393-399页

作者： Xueqing Gao Yu Zhu Shujiao Yang Wei Zhang Rui Cao College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018HebeiChina Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina

Understanding the catalytic mechanism at real catalytically active layer is essential for the advancement of water ***,it is difficult to explore the surface effect of active layer of catalysts on oxygen evolution reaction(OER)independently because of the coexistence of bulk phase and surfaceactive ***,by designing ultra-thin shell amorphous CoO_(x)hollow nanospheres,we explored the effect of single catalytic active layer on OER activity,further revealing the surface catalytic mechanism for seawater *** amorphous catalytic active layer CoO_(x)contain phosphates(CoO_(x)PO_(4)),induced by completely bulk reconstruction of CoP_(x)hollow *** with autologous crystalline CoO,amorphous catalytic active species CoO_(x)-PO_(4)possesses higher OER performance with ultralow overpotential of 229 mV to achieve 10 mA cm^(-2).Remarkably,self-built phosphate film could effectively block chloride anions and implement robust seawater *** work brings direct insights of the surface effect of amorphous catalytic active layer on water oxidation,which is critical for the performance optimization of water oxidation.

关键词： Reconstruction Cobalt phosphide Electrocatalysis Seawater Water oxidation

来源：评论

学校读者我要写书评

暂无评论

Intrinsic kinetics of catalytic hydrogenation of 2-nitro-4-acetylamino anisole to 2-amino-4-acetylamino anisole over Raney nickel catalyst

引用

Chinese Journal of chemical engineering 2023年第12期64卷 1-8页

作者： Xiangyang Cui Xin Zhang Baoju Wang Yuqi Sun Haikui Zou Guangwen Chu Yong Luo Jianfeng Chen State Key Laboratory of Organic-Inorganic Composites Research Center of the Ministry of Education for High Gravity Engineering and TechnologyBeijing University of Chemical TechnologyBeijing 100029China School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000China

The catalytic hydrogenation of 2-nitro-4-acetylamino anisole(NMA)is a less-polluting and efficient method to produce 2-amino-4-acetamino anisole(AMA).However,the kinetics of catalytic hydrogenation of NMA to AMA remains *** this work,the kinetic models including power-law model and Langmuir-Hinshelwood-Hougen-Watson(LHHW)model of NMA hydrogenation to AMA catalyzed by Raney nickel catalyst were *** experiments were carried out under the elimination of mass transfer resistance within the temperature range of 70–100°C and the hydrogen pressure of 0.8–1.5 *** reaction was found to follow 0.52-order kinetics with respect to the NMA concentration and 1.10-order kinetics in terms of hydrogen *** on the LHHW model,the dual-site dissociation adsorption of hydrogen was analyzed to be the rate determining *** research of intrinsic kinetics of NMA to AMA provides the guidance for the reactor design and inspires the catalyst modification.

关键词： Intrinsic kinetics 2-nitro-4-acetylamino anisole Catalytic hydrogenation Raney nickel catalyst

来源：评论

学校读者我要写书评

暂无评论

Reconfigurable liquids enabled by dynamic covalent chemistry

Aggregate

引用

Aggregate 2024年第6期5卷 247-253页

作者： Kaijuan Li Yuzheng Luo Yunhui Wen Wenrui Shan Shaowei Shi State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijingChina

Nanoparticle surfactants(NPSs)that form via the reversible non-covalent interactions between nanoparticles(NPs)and polymer ligands at the oil-water interface have received great attention in constructing structured liquids with unique *** dynamic covalent interactions to generate NPSs is expected to achieve a balance between high mechanical strength and dynamic responsiveness of the interfacial ***,we present the formation,assembly,and jamming of a new type of NPS by the co-assembly between polydopamine NPs(PDA NPs)and poly(styrene-co-methacrylamidophenylboronic acid)at the oilwater *** covalent boronate ester bonds form in situ at the interface and show multiple responsiveness when applying stimuli such as pH,H_(2)O_(2),and temperature,allowing the controlled assembly/jamming of NPSs and reconfiguration of liquid *** to the photothermal property of PDA NPs,the temperature responsiveness of boronate ester bonds can also be triggered by irradiating the biphasic system with near-infrared(NIR)***,when bringing two droplets encapsulated with NPSs into contact and irradiating the contact area by NIR,thermal welding of droplets can be realized,offering a straightforward to construct droplet networks and modular liquid devices.

关键词： dynamic covalent chemistry liquid-liquid interface nanoparticle surfactants structured liquids welding

来源：评论

学校读者我要写书评

暂无评论

engineering S-scheme W_(18)O_(49)/ZnIn_(2)S_(4)heterojunction by Co_(x)P nanoclusters for enhanced charge transfer capability and solar hydrogen evolution

引用

Nano Research 2024年第9期17卷 8095-8103页

作者： Xiaojie Liu Erkang Liu Zixian Wang Wen Zhang Mingyu Dou Hua Yang Changhua An Dacheng Li Jianmin Dou Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252059China Tianjin Key Laboratory of Organic Solar Cell and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin Key Laboratory of Advanced Functional Porous MaterialsInstitute for New Energy Materials and Low-Carbon TechnologiesTianjin University of TechnologyTianjin 300384China Institute of Powder Metallurgy and Advanced Ceramics School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Enhancement of the light-absorption response and utilization of the photogenerated carriers represent a robust strategy for the design of high-performance *** this work,grafting Co_(x)P nanoclusters onto S-scheme heterojunction of W18O49/ZnIn2S4(WO/ZIS-CoxP)with strong response to the ultraviolet-visible-near infrared ray(UV-vis-NIR)region has been achieved,which possesses efficient electron-transfer-channel,and boosts charge-separation and transport *** as-prepared WO/ZIS-Co_(x)P yields an impressive solar-driven hydrogen production rate of 45 mmol·g^(-1)·h^(-1).The increased photocatalytic performance is attributed to the synergistic effect of the composite catalyst:(1)The local surface plasmon resonance-induced“hot electron”injection of W_(18)O_(49)significantly increases the electron density;(2)the engineered S-scheme directional electron transfer promotes charge separation and enhances the reducing capability of photoexcited electrons;and(3)Co_(x)P as electron-trap site for accelerating surface proton reduction *** work provides a platform to impart nonprecious co-catalyst for engineering S-scheme heterojunction,serving a class of efficient solar-driven photocatalyst towards hydrogen production.

关键词： hydrogen cocatalyst photocatalysis S-scheme hot electron

来源：评论

学校读者我要写书评

暂无评论

Catalytic production of high-energy-density spiro polycyclic jet fuel with biomass derivatives

引用

Journal of Energy Chemistry 2025年第2期101卷 760-768,I0016页

作者： Wen-Jing Zhang Yan-Cheng Hu Yan-Hong Tan Jia Li Ning Li Jing-Pei Cao School of Chemical Engineering and Technology China University of Mining and TechnologyXuzhou 221116JiangsuChina CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

High-energy-density(HED)fuel(*** used JP-10 and RJ-4),featuring compact 3D polycyclic structure with high strain,is of critical importance for volume-limited military aircraft,since their high density and combustion heat can provide more propulsion *** reduce the reliance on petroleum source,it is highly desirable to develop renewable alternatives for the production of strained polycyclic HED fuel,but which remains a big challenge because of the inaccessibility caused by the high strain,We herein demonstrate a three-step catalytic route towards highly strained C_(17)and C_(18)spirofuel with biomass *** process includes catalytic aldol condensation of renewable cyclohexanone/cyclopentanone with benzaldehyde,catalytic spiro Diels-Alder(D-A)reaction of aldol adduct with isoprene,and catalytic *** key spiro D-A reaction is enabled by the catalysis of heterogeneous Lewis acidic ionic *** chloroaluminate IL,formed by benign urea and AICl3,exhibits good catalytic performance and reusability for this *** eventual hydrodeoxygenation(HDO)over Pd/C and H-Y produces strained tricyclic spirofuel with density>0.93 g/mL,combustion heat>41 MJ/L and freezing point<-40℃,which are better than the properties of tactical fuel ***,it is anticipated that the as-prepared renewable fuels have the potential to replace traditional petroleum-derived HED fuels.

关键词： Biomass derivatives High-energy-density Spiro polycyclic fuel Cycloaddition Lewis acidic ionic liquid

来源：评论

学校读者我要写书评

暂无评论

Dual-ion pre-inserted Mo glycerate template for constructing NiMo-OS core–shell structure with boosting performance in zinc ions hybrid supercapacitors

引用

Nano Research 2023年第5期16卷 6922-6932页

作者： Shujing Chen Zhengpeng Xiang Zhenyu Xiao Kun-Peng Wang Qi Zhang Lei Wang State Key Laboratory Base of Eco-Chemical Engineering International Science and Technology Cooperation Base of Eco-chemical Engineering and Green ManufacturingCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China

Zinc ion hybrid supercapacitors(ZHS)have received much attention due to the enhanced potential window range and high specific ***,the appropriate positive materials with high electrochemical performance are still a ***,NH_(4)^(+)and glycerate anions pre-inserted Mo glycerate(N-MoG)spheres are synthesized and serve as the template to form NH_(4)^(+)intercalated Ni_(3)S_(2)/Ni_(3)O_(2)(OH)_(4)@MoS_(2)core–shell nanoflower(N-NiMo-OS)in-situ grown on nickel foam(NF)(N-NiMo-OS/NF)by sulfurization *** with the product using traditional MoG as a template,N-NiMo-OS/NF inheriting a larger core structure from N-MoG delivers enhanced space for ions transport and volume expansion during the energy storage process,together with the synergistic effects of multi-components and the heterostructure,the as-prepared N-NiMo-OS/NF nanoflower exhibits excellent performance for the battery-type hybrid supercapacitors(BHS)and ZHS ***,the ZHS device delivers superior electrochemical performance to the BHS device,such as a higher specific capacity of 327.5 mAh·g^(−1)at 1 A·g^(−1),a preeminent energy density of 610.6 Wh·kg^(−1)at 1710 W·kg^(−1),long cycle *** in-situ Raman,ex-situ X-ray photoelectron spectroscopy(XPS),theoretical calculation demonstrate the extra Zn^(2+)insertion/extraction storage mechanism provides enhanced electrochemical performance for ZHS ***,the dual-ion pre-inserted strategy can be extended for other advanced electrode materials in energy storage fields.

关键词： NH_(4)^(+)and glycerate anions pre-inserted Mo glycerate(N-MoG)spheres NH_(4)^(+)intercalated Ni_(3)S_(2)/Ni_(3)O_(2)(OH)_(4)@MoS_(2)core–shell nanoflower(N-NiMo-OS)in-situ grown on nickel foam(NF)(N-NiMo-OS/NF)nanoflower battery-type hybrid supercapacitors zinc ions hybrid supercapacitors

来源：评论

学校读者我要写书评

暂无评论

Insertion of pillararene into Troger’s base-derived porous organic polymer for promoted heterogeneous catalytic performance in Knoevenagel condensation and CO_(2)fixation

引用

Chinese chemical Letters 2024年第1期35卷 482-485页

作者： Lu Liu Ziyi Liu Jingnan Cui Guiling Ning Weitao Gong State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China Engineering Laboratory of Boric and Magnesic Functional Material Preparative and Applied Technology Dalian 116024China

Development of new metal-free heterogeneous catalysts has long been the focus of intense research *** integration of multifunctional monomers into the skeletons of porous organic polymers(POPs)provides an efficient pathway to achieve this ***,we rationally designed and successfully prepared a new Troger’s base(TB)-derived POPs by insertion of pillar[5]arene macrocycle as a positively auxiliary *** the both merits of pillar[5]arene macrocycle and TB moiety,the as-prepared polymer was further explored as an effective metal-free heterogeneous catalyst and exhibited promoted catalytic performance in Knoevenagel condensation and CO_(2)*** work provides a new strategy to fabricate metal-free heterogeneous catalysts based on macrocyclic POPs.

关键词： Pillar[5]arene macrocycle Porous organic polymers Heterogeneous catalytic Knoevenagel condensation CO_(2)fixation

来源：评论

学校读者我要写书评

暂无评论

Synthesis of interfacial electric field-enhanced CdS/Cd_(x)Zn_(1-x)S/ZnO ternary heterojunction by lye dissolution etching mechanism for photocatalytic H_(2)production and CO_(2)reduction

引用

Journal of Materials Science & technology 2025年第1期204卷 152-165页

作者： Qi Li Shengchao Yang Yufan Huang Yuwei Liang Chunling Hu Min Wang Zhiyong Liu Yanlong Tai Jichang Liu Yongsheng Li School of Chemistry and Chemical Engineering Shihezi University/Key Laboratory of Green Process for Chemical Engineering/Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region/Engineering Center for Chemical Materials of Xinjiang BingtuanShihezi UniversityShihezi 832003China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China Key Laboratory of Human-Machine Intelligence-Synergy Systems of Chinese Academy of Sciences(CAS) Shenzhen Institutes of Advanced TechnologyShenzhen 518055China Lab of Low-Dimensional Materials Chemistry Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology ShanghaiShanghai 200237China

The difficulty in fabricating a multifaceted composite heterojunction system based on Cd_(x) Zn_(1-x) S limits the enhancement of photocatalytic *** the present scrutiny,novel ZnO/Cd_(x) Zn_(1-x) S/CdS com-posite heterojunctions are successfully prepared by the alkaline dissolution etching *** internal electric field at the interface of I-type and Z-scheme heterojunction improved the effective charge *** ZC 8 sample exhibits excellent photocatalytic performance and the H2 production efficiency is 15.67 mmol g^(−1) h^(−1) with good stability up to 82.9%in 24-hour *** performance of CH_(4) and CO capacity in the CO_(2) RR process is 3.47μmol g^(−1) h^(−1) and 23.5μmol g^(−1) h^(−1),*** photogener-ated accelerated charge transport is then examined in detail by in situ X-ray photoelectron spectroscopy(ISXPS)and density functional theory(DFT)*** work presents a new idea for the synthe-sis of Cd_(x) Zn_(1-x) S solid-solution-based materials and provides a solid reference for the detailed mechanism regarding the electric field at the heterojunction interface.

关键词： Photocatalysis Interface electric field Composite heterostructure Photocatalytic mechanism Cd_(x)Zn_(1-x)S solid-solution

来源：评论

学校读者我要写书评

暂无评论

Tuning the ratio of Bi/Bi_(2)O_(3)in Bi/PNC nanosheet for highefficiency electrosynthesis hydrogen peroxide

引用

Nano Research 2023年第7期16卷 9050-9058页

作者： Zhikang Bao Jinyan Zhao Shijie Zhang Xiaoge Peng Yizhen Shao Chenghang Jiang Zaixiang Xu Xing Zhong Zihao Yao Jianguo Wang Institute of Industrial Catalysis College of Chemical EngineeringState Key Laboratory Breeding Base of Green-Chemical Synthesis TechnologyZhejiang University of TechnologyHangzhou 310032China

Electrocatalytic two-electron oxygen reduction reaction(2e-ORR)is a promising method for producing green and sustainable H_(2)O_(2)but lacks high selectivity and yields *** it is critical to develop catalysts that meet industrial ***,we report the different ratios of Bi0/Bi^(3+)supported on a phosphorus,nitrogen,and carbon nanosheet(Bi/PNC),which can reduce O_(2) to H_(2)O_(2)with high selectivity(up to 97.75%at 0.4 VRHE)in 0.1 M KOH electrolyte and retain 97%selectivity even after 100 h *** a homemade flow-cell system was built for electrocatalytic production of H_(2)O_(2)under an O_(2) atmosphere using an improved gas diffusion *** Bi/PNC-4 can achieve a high H_(2)O_(2)yield of 2.76 mol·gcatalyst^(-1)·h^(-1)(alkaline),5.29 mol·gcatalyst^(-1)·h^(-1)(neutral),and 3.50 mol·gcatalyst^(-1)·h^(-1)(acid)in universal pH *** in-situ generated H_(2)O_(2)can function as a degradation agent for efficiently degrading pesticides and *** outstanding selectivity and activities are attributed to the synergistic effects of Bi0 and Bi^(3+)that promote proton-coupled reduction of O_(2) to OOH^(*)(ΔGOOH^(*)=4.27 eV),and the formation of H_(2)O_(2).The fast yield of H_(2)O_(2)on Bi/PNC catalysts in flow-cell provides a promising path of electrocatalytic 2e-ORR for practical H_(2)O_(2)production.

关键词： hydrogen peroxide nanosheet Bi_(2)O_(3) Bi degradation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：