检索结果-南通市图书馆

Science China Chemistry 2022年第6期65卷 1112-1121页

作者： Liangbin Liu Chongyang Tang lingzheng bu Xiangheng Xiao Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China School of Physics and Technology Wuhan UniversityWuhan430072China

Two-dimensional(2 D) platinum(Pt)-based nanomaterials are considered as the ideal fuel cell catalysts, while their rational synthesis associated with phase control remains a formidable challenge. Herein, we firstly design the novel 2 D Pt-lead-sulphur heterophased nanosheets(Pt Pb S HPNSs) as efficient high-toleration electrocatalysts for methanol oxidation reaction(MOR).They exhibit much higher activity and more highlighted bifunctional antipoisoning abilities than Pt Pb NSs and commercial Pt/*** density functional theory(DFT) simulation verifies that the decreased electron density of Pt sites worked by Pb and S makes CO intermediate favorable to desorb, avoiding the formation of CO*-polluted Pt sites. Simultaneously, this heterophased interface effectively weakens the adsorption of S^(2-)-species and improves the S-poisoning tolerance, showing a route to realize nearly innoxious catalysis. The present work highlights the importance of heterophase control in tuning antipoisoning property for 2 D Pt-based nanomaterials, which is key for the rational design of efficient fuel cell anodic catalysts.

关键词： two-dimensional platinum heterophase control methanol oxidation reaction poisoning tolerance

同方期刊数据库

Efficient catalytic hydrogen generation by intermetallic platinum-lead nanostructures with highly tunable porous feature

在线全文

学校读者我要写书评

暂无评论

Science bulletin 2019年第1期64卷 36-43页

作者： Bin E lingzheng bu Qi Shao Yujing Li Xiaoqing Huang College of Chemistry Chemical Engineering and Materials Science Soochow University Department of Materials Science and Engineering China University of Petroleum College of Materials Beijing Institute of Technology

The water-gas shift(WGS) reaction is an essential industrial reaction for upgrading hydrogen(H2) by removing carbon monoxide(CO), while highly efficient platinum(Pt)-based catalysts for WGS with simultaneously high activity and stability are still yet to be developed due to the poisoning issue during the reaction. Herein, we report on the porous PtPb peanut nanocrystals(porous PtPb PNCs) and porous PtPb octahedron nanocrystals(porous PtPb ONCs) with controllable ratios of Pt/Pb as extremely active and stable catalysts towards WGS reaction. It exhibits the composition-dependent activity with porous PtPb PNCs-40/ZnO being the most active for WGS to H_2, 16.9 times higher than that of the commercial Pt/C. The porous PtPb PNCs-40/ZnO also display outstanding durability with barely activity decay and negligible structure and composition changes after ten successive reaction cycles. X-ray photoelectron spectroscopy(XPS) results reveal that the suitable binding energy of Pt 4f_(7/2) and the high ratio of Pt(0)to Pt(II) in porous PtPb PNCs/ZnO and porous PtPb ONCs/ZnO are crucial for the enhanced WGS *** CO stripping results indicate the optimized CO adsorption strength on the Pt surface ensure the excellent WGS activity and the outstanding durability. The present work demonstrates an important advance in tuning the porous metal nanomaterials as highly efficient and durable catalysts for catalysis,energy conversion and beyond.

关键词： Porous Selective etching Hydrogen Pt-Pb Water-gas shift

Facet and dimensionality control of Pt nanostructures for efficient oxygen reduction and methanol oxidation electrocatalysts

在线全文

学校读者我要写书评

暂无评论

Nano Research 2016年第9期9卷 2811-2821页

作者： lingzheng bu Yonggang Feng Jianlin Yao Shaojun Guo Jun Guo Xiaoqing Huang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Department of Materials Science and Engineering & Department of Energy and Resources Engineering College of EngineeringPeking UniversityBeijing 100871China Testing & Analysis Center Soochow UniversitySuzhou 215123China

The control of the size, composition, and shape of platinum nanocrystals has attracted much attention recently, mostly due to their unique properties and related catalytic functionalities. However, the realization of platinum nanocrystals with controlled exposed facets and dimensionality remains a significant challenge. Herein, we show an efficient synthetic strategy to selectively prepare highly controllable platinum nanocrystals with distinct dimensionalities from onedimensional nanowires to zero-dimensional octahedra. Although the synthesis of platinum nanowires has been reported multiple times, the synthetic approach reported herein is much more novel and robust and ultimately results in high yields of high-quality platinum nanowires. Such dimensionality tuning on {111} facet dominated platinum nanocrystals allows us to firstly investigate the effect of the number of edges/corners on the electrocatalytic properties. Our results show that the synthesized platinum nanocrystals exhibit very interesting dimensionality-dependent electrocatalytic activity towards both the oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR), in which one-dimensional platinum nanowires with minimized edges/corners show enhanced electrocatalytic activities with respect to zero-dimensional platinum octahedra. Our dimensionality tuning also provides Pt nanowires with superior durability for the oxygen reduction reaction with negligible activity decay over the course of 30,000 potential sweeps. The present work highlights that the {111} facet bound platinum nanowires with minimized edges/corners are indeed promising candidates as electrocatalysts with excellent activity and superior durability. [Figure not available: see fulltext.] © 2016, Tsinghua University Press and Springer-Verlag Berlin Heidelberg.

关键词： platinum nanowires octahedra {111} facet oxygen reduction reaction methanol oxidation reaction

Face-centered cubic structured RuCu hollow urchin-like nanospheres enable remarkable hydrogen evolution catalysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2022年第1期65卷 87-95页

作者： Juntao Zhang Jiabo Le Yuanting Dong lingzheng bu Ying Zhang Jun Cheng Leigang Li Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China

Ruthenium(Ru)is one of the most promising metals for its versatility in driving a wide range of catalytic ***,owing to the intrinsic preference of hexagonal close-packed(hcp)phase for bulk Ru,currently,it is still challenging to construct Ru-based nanomaterials with face-centered-cubic(fcc)phase for optimizing their performance towards potential ***,we report a facile wet-chemical method to directly create unconventional fcc-structured Ru-copper hollow urchin-like nanospheres(fcc-RuCu HUNSs)as a class of efficient pH-universal hydrogen evolution reaction(HER)***,this synthetic strategy can be expanded to prepare other fcc-Ru-based alloy ***,the novel fcc-RuCu HUNSs exhibit superior HER performance with the overpotential of only 25,34,40,and 26 m V to reach the current density of 10 mA cm^(-2)in 0.5 M H_(2)SO_(4),0.05 M H_(2)SO_(4),0.1 M KOH,and 1 M KOH,respectively,much lower than those of hcpRuCu HUNSs and commercial Pt/*** functional theory(DFT)calculations further indicate that their excellent pH-universal HER performance results from the optimized adsorption free energy of H and work *** work highlights the importance of phase control to design high-efficiency nanocatalysts for relevant catalytic reactions in energy conversion.

关键词： ruthenium phase control face-centered cubic hydrogen evolution catalysis pH-universal

同方期刊数据库

Highly porous Pt-Pb nanostructures as active and ultrastable catalysts for polyhydric alcohol electrooxidations

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2019年第3期62卷 341-350页

作者： lingzheng bu Qi Shao Xiaoqing Huang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

Highly porous materials have attracted intensive attention in the past decades due to their unique geometrical configuration, unusual structural features, and outstanding physicochemical properties, but the facile creation of porous metal nanomaterias remains a formidable challenge. Most reports focused on using hard templates to create porous metal nanomaterials via sacrificing the templates. Herein, we have created a new class of porous PtPb/Pt nanocrystals(NCs)with well-defined morphology, composition and porosity through a facile chemical etching approach. Due to the highly open three-dimensional(3D) structure and alloy effect, the porous PtPb/Pt NCs exhibit enhanced performances towards polyhydric alcohol electrooxidations with the optimized porous Pt3Pb nanoplates exhibiting superior activities of 1.75 mA cm-2 and 1.19 A mgPt-1 for ethylene glycol oxidation reaction(EGOR) and of 1.46 m A cm-2 and 1.00 A mg-1Pt for glycerol oxidation reaction(GOR) that are much higher than the commercial Pt/C(0.34 mA cm-2 and 0.22 A mgPt-1 for EGOR, 0.30 mA cm-2 and 0.20 A mgPt-1for GOR). In addition, the porous Pt3Pb nanoplates can endure the long-term stability in EG and glycerol oxidation reactions with limited activity and structure change after 20,000 and 5,000 cycles,respectively, showing a highly promising class of porous Ptbased electrocatalysts for direct polyhydric alcohol fuel cells and beyond.

关键词： nanoporous Pt-Pb nanoplate Pt-Pb octahedron ethylene glycol oxidation glycerol oxidation

Highly Distorted Platinum Nanorods for High-Efficiency Fuel Cell Catalysis

在线全文

学校读者我要写书评

暂无评论

CCS Chemistry 2020年第5期2卷 401-412页

作者： lingzheng bu Bolong Huang Yiming Zhu Fandi Ning Xiaochun Zhou Xiaoqing Huang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversityJiangsu 215123(China) Department of Applied Biology and Chemical Technology Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SAR(China) Division of Advanced Nanomaterials Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences(CAS)Jiangsu 215123(China)

Different from studies where less defective platinum(Pt)-based nanomaterials have been widely used to improve the catalysis of the oxygen reduction reaction(ORR)for proton-exchange membrane fuel cells(PEMFCs),herein we have demonstrated that a new class of Pt nanorods(NRs)with a highly distorted configuration can be applied as an advanced,high-efficiency fuel cell catalyst,as transformed from spongy Pt–tellurium NRs(PtTe2 NRs)through sequential chemical and electrochemical aging *** resulting highly distorted Pt NRs exhibit excellent ORR-specific and mass activities of 4.70mA cm−2 and 2.77 Amg−1 Pt at 0.90 V versus the reversible hydrogen electrode(RHE),which are 18.8 and 16.3 times higher than those of commercial Pt/C catalyst,and the mass activity is 6.3 times higher than 2020 *** of Energy ***,negligible activity decays were observed after 30,000 *** high ORR performance endows these unique Pt NRs with enhanced activity and lifetimes for practical fuel cell catalysis in comparison with commercial Pt/C,which is consistent with the experimental *** has been demonstrated that the anomaly of strong electron–lattice coupling suppresses Coulombic repulsion for barrier-free electron transfer while concurrently exposing a large number of active sites,which is a key to superior high-performance fuel cell reactions.

关键词： distortion oxygen reduction reaction platinum nanorod fuel cell catalysis

Surface Engineered Ru_(2)Ni Multilayer Nanosheets for Hydrogen Oxidation Catalysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2023年第8期5卷 1931-1941页

作者： Juntao Zhang Xing Fan Suling Wang Maofeng Cao lingzheng bu Yong Xu Haiping Lin Xiaoqing Huang College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005 Institute of Functional Nano and Soft Materials Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123 Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006 School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710119

The hydrogen oxidation reaction(HOR)in alkaline conditions is of great importance for the application of anion exchange membrane fuel cells(AEMFCs).However,the electrocatalysts for alkaline HOR generally suffer from the disadvantage of sluggish ***,we have fabricated Ru2Ni multilayered nanosheets(Ru2Ni MLNSs)in the layer-by-layer manner and engineered the surface properties via postannealing for efficient alkaline *** investigations reveal that such annealing at different temperatures can alter the surface properties of Ru2Ni MLNSs and thus regulate their adsorption abilities toward*H and**** particular,the optimal catalyst exhibits a mass activity of 4.34 A mgRu−1 at an overpotential of 50 mV,which is 18.1 and 13.2 times higher than those of Ru/C(0.24 A mgRu−1)and Pt/C(0.33 A mgPt−1),*** calculations indicate that the presence of surface O atoms can facilitate the HOR activity while the excessive coverage of O atoms on Ru2Ni surface leads to the strengthened H binding and the decay of HOR *** work not only provides an efficient catalyst for alkaline HOR,but it also may shed new light on the design of high-performance catalysts for electrocatalysis and *** have fabricated Ru2Ni multilayer nanosheets(Ru2Ni MLNSs)and realized the surface engineering via an annealing *** investigations show that such surface engineering can regulate the surface properties and thus promote the alkaline HOR ***,the optimal catalyst exhibits a much higher activity than those of commercial Ru/C and Pt/C and is a promising catalyst for alkaline HOR.

关键词： surface engineering Ru2Ni multilayered nanosheet synergy surface O atom hydrogen oxidation catalysis

Atomically isolated Pd sites within Pd-S nanocrystals enable trifunctional catalysis for direct,electrocatalytic and photocatalytic syntheses of H_(2)O_(2)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第3期15卷 1861-1867页

作者： Tang Yang Chengyong Yang Jiabo Le Zhiyong Yu lingzheng bu Leigang Li Shuxing Bai Qi Shao Zhiwei Hu Chih-Wen Pao Jun Cheng Yonggang Feng Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Max-Planck-Institute for Chemical Physics of Solids Nöthnitzer Street 40Dresden 01187Germany “National Synchrotron Radiation Research Center” Hsinchu 30076TaiwanChina

Although high-efficiency production of hydrogen peroxide(H_(2)O_(2))can be realized separately by means of direct,electrochemical,and photocatalytic synthesis,developing versatile catalysts is particularly challenging yet ***,for the first time we reported that palladium-sulphur nanocrystals(Pd-S NCs)can be adopted as robust and universal catalysts,which can realize the efficient O_(2) conversion by three *** a result,Pd-S NCs exhibit an excellent selectivity(89.5%)to H_(2)O_(2)with high productivity(133.6 mol·kgcat^(−1)·h^(−1))in the direct synthesis,along with the significantly enhanced H_(2)O_(2)production activity and stability via electrocatalytic and photocatalytic *** is demonstrated that the isolated Pd sites can enhance the adsorption of O_(2) and inhibit its O–O bond dissociation,improving H_(2)O_(2)selectivity and reducing H_(2)O_(2)*** study confirms that the difference in surface atom composition and arrangement is the key factor for different ORR mechanisms on Pd NCs and Pd-S NCs.

关键词： Pd-S universality direct synthesis of H_(2)O_(2) oxygen reduction photocatalysis

H-Implanted Pd Icosahedra for Oxygen Reduction Catalysis: From Calculation to Practice

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2021年第8期3卷 1972-1982页

作者： lingzheng bu Xiaorong Zhu Yiming Zhu Chen Cheng Yafei Li Qi Shao Liang Zhang Xiaoqing Huang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu 215123 State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005 Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials Jiangsu Key Laboratory of New Power BatteriesSchool of Chemistry and Materials ScienceNanjing Normal UniversityJiangsu 210023 Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversityJiangsu 215123

Although palladium(Pd)has gradually emerged as the most likely candidate to replace platinum(Pt)in the oxygen reduction reaction(ORR),the specific electronic structure of conventional Pd results in too strong Pd–O binding strength and unsatisfactory ORR ***,guided by density functional theory,we have explored a strategy to expand lattice spacing by implanting hydrogen(H)atoms in Pd nanocrystals(NCs),which realizes decreased electron density to boost ORR.

关键词： H-implanting palladium icosahedron non-platinum oxygen reduction catalysis

Defect engineered 2D mesoporous Mo-Co-O nanosheets with crystalline-amorphous composite structure for efficient oxygen evolution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Materials 2022年第12期65卷 3470-3478页

作者： Chuansheng He Xiaochen Hu Jia Wang lingzheng bu Changhong Zhan Bingyan Xu Leigang Li Yunchao Li Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen University.Xiamen 361005China College of Chemistry Beijing Normal UniversityBeijing 100875China Graduate School of Integrated Sciences for Life Hiroshima UniversityHigashi-HiroshimaHiroshimaJapan

Two-dimensional(2D)mesoporous metal-oxide(hydroxide)nanomaterials with defects are promising towards the realization of efficient ***,we report a facile and effective one-pot solvothermal route to synthesize mesoporous Mo_(x)-Co-O hybrid nanosheets(NSs)which is composed of crystalline Mo_(4)O_(11) and amorphous cobalt *** to the corrosion of 1-octylamine at high temperatures,abundant mesoporous holes are created in situ over the Mo_(x)-Co-O hybrid NSs during the solvothermal process,which is beneficial to increasing the electrochemical surface *** dimension of the Mox-Co-O NSs,size of mesoporous and the concentration of defects can be easily modulated by controlling the molar ratio of Mo/*** measurements reveal that the 2D mesoporous Mo_(x)-Co-O NSs show an excellent activity for the oxygen evolution reaction with the highest catalytic activity of η_(10)=276 mV at 10 mA cm^(−2)in 1 mol L^(−1)*** adsorption of intermediates and abundant oxygen vacancies achieved by appropriate Mo doping are the two main factors that contribute to the excellent catalytic activity of Mo_(0.2)-Co-O *** work,with the construction of 2D metal-oxide(hydroxide)crystallineamorphous nanomaterials possessing abundant holes,oxygen vacancies and enhanced adsorption of intermediates,provides important insight on the design of more efficient catalysts.

关键词： mesoporous oxygen vacancy amorphous nanosheet oxygen evolution reaction