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Interfacial synergistic effect in SnO_(2)/PtNi nanocrystals enclosed by high-index facets for high-efficiency ethylene glycol electrooxidation

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Nano Research 2022年第9期15卷 7877-7886页

作者： Shuna Li Haixiao Sun Jiaai Zhang Longjiao Zheng Yunrui Li Xu Fang Yujie Liu Qi Song Zhen Wang Yufeng Gao Xin Zhang Xiaoping Dai Yandi Cai Fei Gao State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and EnvironmentChina University of PetroleumBeijing 102249China Jiangsu Key Laboratory of Vehicle Emissions Control School of the EnvironmentNanjing UniversityNanjing 210093China

Strengthening the oxide-metal interfacial synergistic interaction in nanocatalysts is identified as potential strategy to boost intrinsic activities and the availability of active sites by regulating the surface/interface environment of ***,the SnO_(2)/PtNi concave nanocubes(CNCs)enclosed by high-index facets(HIFs)with tunable SnO_(2)composition are successfully fabricated through combining the hydrothermal and self-assembly *** interfacial interaction between ultrafine SnO_(2)nanoparticles and PtNi with HIFs surface structure is characterized by analytical *** as-prepared 0.20%SnO_(2)/PtNi catalyst exhibits extraordinarily high catalytic performance for ethylene glycol electrooxidation(EGOR)in acidic conditions with specific activity of 3.06 mA/cm^(2),which represents 6.2-fold enhancement compared with the state-of-the-art Pt/C ***,the kinetic study demonstrates that the strong interfacial interaction between SnO_(2)and PtNi not only degrades the activation energy barrier during the process of EGOR but also enhances the CO-resistance ability and long-term *** study provides a novel perspective to construct highly efficient and stable electrocatalysts for energy conversions.

关键词： Pt-based catalyst high-index facets undercoordinated surface atoms interfacial synergistic effect ethylene glycol electrooxidation

Phosphorus-doping-tuned PtNi concave nanocubes with high-index facets for enhanced methanol oxidation reaction

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Nano Research 2022年第8期15卷 6961-6968页

作者： Aixin Fan Congli Qin Ruxia Zhao Haixiao Sun Hui Sun Xiaoping Dai Jin-Yu Ye Shi-Gang Sun Yanhong Lu Xin Zhang School of Chemistry&Material Science Langfang Normal UniversityLangfang 065000China ShanDong Drug and Food Vacational Colleage Weihai 255000China State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of PetroleumBeijing 102249China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Surface engineering has been found to be an efficient strategy to boost the catalytic performance of noble-metal-based *** this work,a small amount of P was doped to the surface of PtNi concave cube(P-PtNi CNC).Interestingly,the P-PtNi CNC nanocatalyst shows an enhanced methanol oxidation reaction(MOR)performance with achieving 8.19 times of specific activity than that of comercial Pt/*** electrochemical in situ Fourier transform infrared spectroscopy(FTIR)results reveal that the surface P doping promotes the adsorption energy of OH,enhancing the resistance against CO ***,the intermediate adsorbed CO(COads)reacted with adsorbed OH(OHads)through the Langmuir–Hinshelwood(LH)mechanism to generate CO_(2)and release surface active sites for further *** work provides a promising strategy via the incorporation of non-metallic elements into the PtNi alloys bounded with high-index facets(HIFs)as efficient fuel cell catalysts.

关键词： P doping high-index facets methanol oxidation reaction in situ Fourier transform infrared spectroscopy

Catalytic PtPd bimetal nanocrystals with high-index facets for radiation injury repair

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Chinese Chemical Letters 2020年第1期31卷 269-274页

作者： Wei Long Jingya Wang Fujuan Xu Hongying Wu Xiaoyu Mu Junying Wang Yuanming Sun Xiao-Dong Zhang Key Laboratory of Tianjin Radiation and Molecular Nuclear Medicine Institute of Radiation MedicineChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjin 300192China Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology School of ScienceTianjin UniversityTianjin 300350China

Radiotherapy is one of the most important clinical cancer treatments,which works mainly by delive ring a prescribed radiation dose to the tumor ***,high doses of radiation may also lead many irreversible damages to the surrounding normal ***,how to effectively reduce these sideeffects has been a significant factor in influencing cancer therapeutic *** this work,we synthesized the hollow PtPd nanocubes with high-index facets,and investigated the radiation protection capability in vitro and in *** results showed the PtPd nanocrystals can decrease the ROS level and improve the survival rate of radiated ***,survival rate of radiated mice can significantly increase from 0 to 30%after PtPd ***,the enzyme and ROS level in radiated mice can be recovered.

关键词： Radiation protection Nanocrystals high-index facets Bimetal Radiation injury

highly Selective Enrichment of Phosphopeptides with high-index facets Exposed Octahedral Tin Dioxide Nanoparticles for Mass Spectrometric Analysis

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Highly Selective Enrichment of Phosphopeptides with High-Ind...

Deposition of SnO2 on the Anatase TiO2 {105} facets with high Photocatalytic Performance

第八届全国化学生物学学术会议

作者：马荣娜 Junjie Hu Huangxian Ju State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing University

＜正＞Many efforts have been devoted into developing novel materials for selective capture and enrichment of low-abundant phosphopeptides prior to mass spectrometic *** the present study,octahedral tin dioxide nanopar... 详细信息

关键词： high-index facets Octahedral SnO2 Phosphopeptide

来源： cnki会议评论

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Chinese Journal of Chemistry 2013年第12期31卷 1503-1507页

作者： Haibo Jiang Jun Xing Chongwu Wang Huagui Yang Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China Centre for Clean Environment andEnergy Gold Coast Campus Griffith University Queensland 4222 Australia

Anatase TiO2 as a promising photocatalyst has been widely employed in the decontamination treatment of polluted water, air purification and water splitting. Coupling TiO2 with other semiconductor materials could further enhance the photocatalytic activity. Here, we successfully synthesized the SnOz/TiO2 catalyst by depositing SnO2 particles on the anatase TiO2 {105} facets through a gas phase oxidation process. The SnOz/TiO2 catalyst shows higher photocatalytic activity for decomposition of MB than that of the pure YiO2 catalyst. The enhanced photo- catalytic activity can be attributed to the efficient charge separation since TiO2 and SnO2 catalyst have staggered energy level.

关键词： high-index facets SnOjTiO2 composite photocatalyst

Atomic-scaled surface engineering Ni-Pt nanoalloys towards enhanced catalytic efficiency for methanol oxidation reaction

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Nano Research 2020年第11期13卷 3088-3097页

作者： Aixian Shan Shuoyuan Huang Haofei Zhao Wengui Jiang Xueai Teng Yingchun Huang Chinping Chen Rongming Wang Woon-Ming Lau Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green InnovationBeijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceSchool of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing100083China Department of Physics Peking UniversityBeijing100871China Shunde Graduate School of University of Science and Technology Beijing Foshan528300China

Surface engineering is known as an effective strategy to enhance the catalytic properties of Pt-based ***,we report on surface engineering Ni-Pt nanoalloys with a facile method by varying the Ni doping concentration and oleylamine/oleicacid *** alloy-composition,exposed facet condition,and surface lattice strain are,thereby manipulated to optimize the catalytic efficiency of such nanoalloys for methanol oxidation reaction(MOR).Exemplary nanoalloys including Ni_(0.69)Pt_(0.31)truncated octahedrons,Ni_(0.45)Pt_(0.55)nanomultipods and Ni_(0.20)Pt_(0.80)nanoflowers are thoroughly characterized,with a commercial Pt/C catalyst as a common *** variations in MOR catalytic efficiency are significant:2.2 A/mgPt for Ni_(0.20)Pt_(0.80)nanoflowers,1.2 A/mgPt for Ni_(0.45)Pt_(0.55)nanomultipods,0.7 A/mgPt for Ni_(0.69)Pt_(0.31)truncated octahedrons,and 0.6 A/mgPt for the commercial Pt/C *** by density functional theory calculations,we correlate these observed catalysis-variations particularly to the intriguing presence of surface interplanar-strains,such as{111}facets with an interplanar-tensile-strain of 2.6%and{200}facets with an interplanar-tensile-strain of 3.5%,on the Ni_(0.20)Pt_(0.80)nanoflowers.

关键词： surface-strain high-index facets Ni-Pt alloy controllable synthesis electrocatalysis

Effective fabrication of porous Au-Ag alloy nanorods for in situ Raman monitoring catalytic oxidation and reduction reactions

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Journal of Materials Science & Technology 2021年第32期91卷 262-269页

作者： Shanlin Ke Caixia Kan Xingzhong Zhu Changshun Wang Weijian Gao Zhaosheng Li Xiaoguang Zhu Daning Shi College of Science Nanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Aerospace Information Materials and Physics Ministry of Industry and Information TechnologyNanjing 210016China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093China Institute of Solid State Physics Chinese Academy of SciencesHefei 230031China Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education Nanjing 210016China

Porous metal nanostructures exhibit excellent catalytic properties due to their high surface-to-volume ratios and abundant catalytic active sites. However, it is still challenging to control nanopores density and structural features in a facile route and the preparation of porous alloy nanorods for catalytic application has not been well explored. In this work, we demonstrate a synthetic strategy to fabricate highly porous Au–Ag alloy nanorods(P-Au Ag NRs) by critically dealloying Ag atoms from homogeneous solid Au–Ag alloy nanorods(Au Ag NRs). Combining the merits of the tunable plasmonic properties of noble metal nanorods, excellent stabilities of alloys, and superior catalytic activities of porous structures, we use the P-Au Ag NRs as a Raman probe for the in situ monitoring of the catalytic oxidation of 3,3',5,5' tetramethylbenzidine(TMB) and reduction of 4-nitrothiophenol(4-NTP). We also compare their compositiondependent catalytic activities. The results show that P-Au Ag NRs possess superior chemical stability and higher catalytic activity than those of core-shell structures due to synergistic structural and chemical mechanisms. This strategy provides a predictive design approach for the next-generation alloy catalysts with high-performance.

关键词： Catalysis Porous Au-Ag alloy nanorod high-index facets Raman monitoring Oxidation and reduction

Cu_(2−x)S derived copper nanoparticles:A platform for unraveling the role of surface reconstruction in efficient electrocatalytic CO_(2)-to-C_(2)H_(4)conversion

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Nano Research 2023年第4期16卷 4494-4498页

作者： Chaohua He Delong Duan Jingxiang Low Yu Bai Yawen Jiang Xinyu Wang Shuangming Chen Ran Long Li Song Yujie Xiong Hefei National Laboratory for Physical Sciences at the Microscale Frontiers Science Center for Planetary Exploration and Emerging TechnologiesSchool of Chemistry and Materials Scienceand National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China Hefei Comprehensive National Science Center 350 Shushanhu Rd.Hefei 230031China

Cu-based electrocatalysts have provoked much attention for their high activity and selectivity in carbon dioxide(CO_(2))conversion into multi-carbon ***,during the electrochemical reaction,Cu catalysts inevitably undergo surface reconstruction whose impact on CO_(2)conversion performance remains *** we report that polycrystalline Cu nanoparticles(denoted as Cu-s)with rich high-index facets,derived from Cu_(2−x)S through desulphurization and surface reconstruction,offer an excellent platform for investigating the role of surface reconstruction in electrocatalytic CO_(2)*** the formation of Cu-s catalyst,the two stages of desulphurization and surface reconstruction can be clearly resolved by in situ X-ray absorption spectroscopy and OH−adsorption characterizations,which are well correlated with the changes in electrocatalytic *** turns out that the high CO_(2)conversion performance,achieved by the Cu-s catalyst(Faradic efficiency of 68.6%and partial current density of 40.8 mA/cm^(2)in H-cell toward C_(2)H_(4)production),is attributed to the increased percentage of high-index facets in Cu-s during the surface ***,the operando electrochemical Raman spectroscopy further reveals that the conversion of the CO_(2)into the C_(2)H_(4)on Cu-s is intermediated by the production of**** findings manifest that the surface reconstruction is an effective method for tuning the reaction intermediate of the CO_(2)conversion toward high-value multicarbon(C2+)chemicals,and highlight the significance of in situ characterizations in enhancing the understanding of the surface structure and its role in electrocatalysis.

关键词： CO_(2)electroreduction reaction surface reconstruction high-index facets ethylene(C_(2)H_(4)) Cu catalysts

high-index faceted noble metal nanostructures drive renewable energy electrocatalysis

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Nano Materials Science 2020年第4期2卷 309-315页

作者： Chunji Li Mingchuan Luo Zhonghong Xia Shaojun Guo Department of Materials Science&Engineering College of EngineeringPeking UniversityBeijing100871China State Power Investment Corporation Hydrogen Energy Co. LTDChina BIC-ESAT College of EngineeringPeking UniversityBeijing100871China

Noble metallic nanocrystals are used in a wide variety of applications,such as catalysis,batteries,and bio-and chemical *** of the previous studies focus on the preparation of thermodynamically stable nanocrystals enclosed by low-index facets and discuss their corresponding catalytic ***,researchers have found that the nanocrystals with high-index facets(HIFs)are of more interest for ***,we review recent key progress in the synthesis of noble metallic nanoparticles enclosed with HIFs and their facetdependent electrocatalytic ***,we introduce the concept of HIFs,and establish the correlation between their surface structure and catalytic ***,we discuss various synthetic approaches for controlling the shapes and composition of the nanocrystals enclosed by ***,we showcase the enhanced electrocatalytic performance realized by HIF-based ***,we provide guidance on how to improve the electrocatalysis by engineering HIFs on noble metallic nanocrystals.

关键词： high-index facets Noble metal nanocrystals Electrocatalysis Electrochemical method Wet-chemical method