检索结果-南通市图书馆

Achieving Negatively Charged pt single atoms on Amorphous Ni(OH)_(2)Nanosheets with Promoted Hydrogen Absorption in Hydrogen Evolution

引用

Nano-Micro Letters 2024年第10期16卷 213-224页

作者： Yue Liu Gui Liu Xiangyu Chen Chuang Xue Mingke Sun Yifei Liu Jianxin Kang Xiujuan Sun Lin Guo School of Chemistry Beijing Advanced Innovation Center for Biomedical EngineeringKey Laboratory of Bio-inspired Smart Interfacial Science and TechnologyBeihang UniversityBeijing 100191People's Republic of China School of Chemistry Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of EducationXiangtan UniversityXiangtan 411105HunanPeople'Republic of China

single-atom(SA)catalysts with nearly 100%atom utilization have been widely employed in electrolysis for decades,due to the outperforming catalytic activity and ***,most of the reported SA catalysts are fixed through the strong bonding between the dispersed single metallic atoms with nonmetallic atoms of the substrates,which greatly limits the controllable regulation of electrocatalytic activity of SA *** this work,pt-Ni bonded pt SA catalyst with adjustable electronic states was successfully constructed through a controllable electrochemical reduction on the coordination unsaturated amorphous Ni(OH)_(2)nanosheet *** on the X-ray absorption fine structure analysis and first-principles calculations,pt SA was bonded with Ni sites of amorphous Ni(OH)_(2),rather than conventional O sites,resulting in negatively charged pt^(δ-).In situ Raman spectroscopy revealed that the changed configuration and electronic states greatly enhanced absorbability for activated hydrogen atoms,which were the essential intermediate for alkaline hydrogen evolution *** hydrogen spillover process was revealed from amorphous Ni(OH)_(2)that effectively cleave the H-O-H bond of H_(2)O and produce H atom to the pt SA sites,leading to a low overpotential of 48 mV in alkaline electrolyte at-1000 mA cm^(-2)mg^(-1)_(pt),evidently better than commercial pt/C *** work provided new strategy for the control-lable modulation of the local structure of SA catalysts and the systematic regulation of the electronic states.

关键词： Hydrogen evolution reaction Amorphous pt single atoms Hydrogen spillover

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improved Plasmonic Hot‑Electron Capture in Au Nanoparticle/Polymeric Carbon Nitride by pt single atoms for Broad‑Spectrum Photocatalytic H_(2)Evolution

引用

Nano-Micro Letters 2023年第8期15卷 423-435页

作者： Manyi Gao Fenyang Tian Xin Zhang Zhaoyu Chen Weiwei Yang Yongsheng Yu MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangPeople’s Republic of China Space Environment Simulation Research Infrastructure Harbin Institute of TechnologyHarbin 150001People’s Republic of China

ABSTRACT Rationally designing broad-spectrum photocatalysts to harvest whole visible-light region photons and enhance solar energy conversion is a“holy grail”for researchers,but is still a challenging ***,based on the common polymeric carbon nitride(PCN),a hybrid co-catalysts system comprising plasmonic Au nanoparticles(NPs)and atomically dispersed pt single atoms(ptSAs)with different functions was constructed to address this *** the dual co-catalysts decorated PCN(ptSAs–Au_(2.5)/PCN),the PCN is photoexcited to generate electrons under UV and short-wavelength visible light,and the synergetic Au NPs and ptSAs not only accelerate charge separation and transfer though Schottky junctions and metal-support bond but also act as the co-catalysts for H_(2) ***,the Au NPs absorb long-wavelength visible light owing to its localized surface plasmon resonance,and the adjacent ptSAs trap the plasmonic hot-electrons for H_(2) evolution via direct electron transfer ***,the ptSAs–Au_(2.5)/PCN exhibits excellent broad-spectrum photocatalytic H_(2) evolution activity with the H_(2) evolution rate of 8.8 mmol g^(−1) h^(−1) at 420 nm and 264μmol g^(−1) h^(−1) at 550 nm,much higher than that of Au_(2.5)/PCN and ptSAs–PCN,*** work provides a new strategy to design broad-spectrum photocatalysts for energy conversion reaction.

关键词： Polymeric carbon nitride Au nanoparticles pt single atoms Photocatalytic H2 evolution Broad-spectrum photocatalysts

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Lattice strain induced by trace pt single atoms in nickel for accelerating industrial hydrogen evolution

引用

Journal of Energy Chemistry 2024年第11期98卷 503-511页

作者： Rui Yao Yun Wu Kaiyang Zhang Shuhui Fan Qiang Zhao Jinping Li Guang Liu College of Chemical Engineering and Technology Shanxi Key Laboratory of Gas Energy Efficient and Clean UtilizationTaiyuan University of TechnologyTaiyuan 030024ShanxiChina Shanxi Research Institute of Huairou Laboratory Taiyuan 030031ShanxiChina

Strategically designing the electrocatalytic system and cleverly inducing strain is an effective approach to balance the cost and activity of pt-based electrocatalysts for industrial-scale hydrogen ***,we present a unipolar pulsed electrodeposition(UPED) strategy to induce strain in the Ni lattice by introducing trace amounts of pt single atoms(SAs)(0.22 wt%).The overpotential decreased by 183 mV at 10 mA cm^(-2) in 1.0 M KOH after introducing trace amounts of pt_(SAs).The industrial electrolyzer,assembled with pt_(SAs)Ni cathode and a commercial NiFeO_(x) anode,requires a cell voltage of 1.90 V to attain 1 A cm^(-2) of current density and remains stable for 280 h,demonstrating significant potential for practical *** aberration corrected scanning transmission electron microscopy(AC-STEM),X-ray absorption(XAS),and geometric phase analysis(GPA) indicate that the introduction of trace amounts of pt SAs induces tensile strain in the Ni lattice,thereby altering the local electronic structure and coordination environment around cubic Ni for enhancing the water decomposition kinetics and fundamentally changing the reaction *** doping-strain strategy showcases conformational relationships that could offer new ideas to construct efficient hydrogen evolution reaction(HER) electrocatalysts for industrial hydrogen production in the future.

关键词： Unipolar pulsed electrodeposition pt single atoms Ni lattice Hydrogen evolution reaction H intermediates

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

pt single atoms in oxygen vacancies boost reverse water-gas shift reaction by enhancing hydrogen spillover

引用

Science China Materials 2024年第11期67卷 3579-3588页

作者： Xin Kang Jiancong Liu Ying Xie Dongxu Wang Qihui Liu Peng Yu Chungui Tian Honggang Fu Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationHeilongjiang UniversityHarbin 150080China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025China

The construction of synergistic catalysis of single atom catalysts(SACs)and oxygen vacancies(OV)on supports is crucial for the enhancement of heterogeneous catalytic efficiency,yet presents considerable ***,we have developed an amine-molecule-assisted in-situ anchoring strategy that effectively stabilizes pt SACs on OV sites of reduced TiO_(2)(TiO_(2)–x)by controlling the interaction of amine with pt species and TiO_(2)–*** evidence indicates that pt SACs are anchored on the OV with forming ptδ+–OV–Ti3+sites and strong metal-support interaction,which not only prevents the sintering of pt SACs under high-temperature reduction treatments,but also enhances the hydrogen spillover process to facilitate the formation of more OV *** the reverse water-gas shift(RWGS)reaction,the enhanced amount of OV sites can increase CO_(2)adsorption,while the pt SACs can efficiently promote the activation and spillover of *** combined synergistic effects greatly improve its catalytic performance with a high turnover frequency(TOF)of 9289 h−1 at 330℃ and notable stability for over 200 h,surpassing those of pt clusters and nanoparticles on TiO_(2)–*** work provides a new avenue for the controllable synthesis of synergistic catalysts with SACs and OV,significantly advancing catalytic efficiency.

关键词： pt single atoms oxygen vacancies TiO_(2) reverse water-gas shift reaction hydrogen spillover

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

1T-phase MoS_(2)edge-anchored pt_(1)-S_(3)active site boosting selective hydrogenation of biomass-derived maleic anhydride

引用

Rare Metals 2023年第8期42卷 2658-2669页

作者： Xue Sun Yi Zhao Kuan Chang Bo Peng Qing-Qing Gu Bing Yang Bai-Yang Yu Jing Xu Fu-Dong Liu Ying Zhang Cheng-Si Pan Yang Lou Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China International Joint Research Center for Photoresponsive Molecules and Materials Jiangnan UniversityWuxi 214122China SINOPEC Research Institute of Petroleum Processing Beijing 100083China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsDalian 116023China School of Food Science and Technology Jiangnan UniversityWuxi 214122China Department of Civil Environmentaland Construction EngineeringCatalysis Cluster for Renewable Energy and Chemical Transformations(REACT)NanoScience Technology Center(NSTC)University of Central FloridaOrlandoFL 32816USA

Selective hydrogenation of biomass-derived maleic anhydride(MAH)to succinic anhydride(SA)is valuable but remains a challenge due to the complicated reaction *** here report that single pt atoms decorated onto the edges of two-dimensional(2D)1Tphase MoS_(2)(pt1/1T-MOS_(2)SAC)as a proof-of-concept catalyst can efficiently convert biomass-derived MAH to SA with 100%conversion and 100%selectivity under mild *** kinetic data and characterization results suggest that the catalytic performance of the edge-anchored pt1/1T-MoS_(2)SAC originates from the facile H_(2)dissociation induced by the electron-deficient pt1atoms and the pocket-like configuration of pt1active site confines the adsorption configuration of MAH by the steric *** strategy of fabricating edge-confined catalysts offers a new direction to design novel SACs for biomass-derived transformations.

关键词： Two-dimensional(2D)1T-MoS_(2) Edgeconfinement pt single atoms Selective hydrogenation reaction Reaction kinetics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Atomic pt anchored on hierarchically porous monolithic carbon nanowires as high-performance catalyst for liquid hydrogenation

引用

Nano Research 2023年第4期16卷 5880-5886页

作者： Zhengbin Tian Xiaohui Deng Ping He Guang-Hui Wang Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China University of Chinese Academy of Sciences 100049 BeijingChina

Monolithic catalysts play a crucial role in various catalytic applications,e.g.,chemical synthesis,energy conversion,and environmental treatment,but their catalytic efficiency is often limited by the restricted mass transfer and insufficient exposure of active ***,we present a dual-templating strategy to fabricate atomic pt dispersed on monolithic N-doped mesoporous carbon nanowires(pt_(1)/NMCW)with abundant super-/macropores,which,as monolithic catalyst,exhibits high catalytic performance in hydrogenation of 4-nitrophenol(4-NP).During synthesis,triblock copolymer(Pluronic F127)is employed as a primary soft template to generate the mesoporous structured carbon nanowires to improve the accessibility of pt single sites;KCl crystallite is used as a secondary hard template to create the super-/macropores,which are beneficial for enhancing the mass transfer *** to the dual-templating strategy that creates the monolithic carbon nanowires with hierarchically porous structure,the obtained pt_(1)/NMCW shows highly enhanced catalytic activity in 4-NP hydrogenation,outperforming its analogue synthesized without using KCl as template and being comparable to the nano-powder catalyst(i.e.,atomic pt loaded on the Ndoped carbon nanospheres,pt_(1)/NCS).

关键词： dual-templating strategy monolithic catalysts porous carbon nanowires pt single atoms hydrogenation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：