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Size-effect on Ni electrocatalyst:The case of electrochemical benzyl alcohol oxidation

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Nano Research 2023年第1期16卷 202-208页

作者： Jian Zhong yongli shen Pei Zhu Shuang Yao Changhua An Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

The nanoparticles(NPs)of Ni with different sizes endows its distinctive physical and chemical properties,which represents a typical strategy for the development of high-performance ***,the size effect of metallic Ni-NPs on electrocatalytic performance remains ***,the Ni-NPs with different sizes supported on nitrogen doped carbon(NC)has been synthesized by controlling the pyrolysis temperature,leading to the synthesis of Ni@NC-500(8.3 nm),Ni@NC-280(1.9 nm)and Ni@NC-200(1.0 nm).The electrooxidation of benzyl alcohol(BA)over these nanocatalysts shows the yield of benzoic acid was 99%,82%,55%on Ni@NC-280,Ni@NC-200 and Ni@NC-500,*** experimental and theoretical simulation demonstrate that the difference in the adsorption strength of reactant molecules by Ni-NPs is responsible for their different performance,where the Ni@NC-280 exhibits an optimal adsorption configuration between Ni@NC-280 electrode and *** work provides a new angle for designing and synthesizing efficient electrocatalysts,which may be extended to the exploration of various promising electrocatalytic systems.

关键词： size effect electro-oxidation Ni nanoparticles benzyl alcohol

FeNi nanoparticles on Mo_(2)TiC_(2)T_(x)MXene@nickel foam as robust electrocatalysts for overall water splitting

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Nano Research 2021年第10期14卷 3474-3481页

作者： Jiayang Wang Peilei He yongli shen Linxiu Dai Zhe Li Yue Wu Changhua An Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China Department of Chemical and Biological Engineering Iowa State UniversityIA 50011USA

The development of cost-effective electrocatalysts for overall water splitting is highly desirable,remaining a critical challenge at current ***,a class of composite FeNi@MXene(Mo_(2)TiC_(2)T_(x))@nickel foam(NF)has been synthesized through introducing Fe2+ions and in-situ combining with surface nickel atoms on nickel *** obtained FeNi@Mo_(2)TiC_(2)T_(x)@NF exhibited high activity with overpotentials of 165 and 190 mV for the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)at a current density of 10 mA·cm^(-2),*** synergetic effects of Mo_(2)TiC_(2)T_(x)and FeNi nanoalloys lead to increasing catalytic activities,where MXene provides high active surface area and rich active sites for HER,and FeNi nanoalloys promote the *** simulation of electron exchange capacity between FeNi and MXene in FeNi@Mo_(2)TiC_(2)T_(x)catalyst shows that electrons transferred from surface Mo atoms to the interface between FeNi and MXene,indicating that the electrons are accumulated near the FeNi *** kind of electronic distribution facilitates the formation of intermediate of ***,(H++e-)is more inclined onto Mo-Ni interfaces for *** Gibbs free energy changes for H*to HER and potential-limiting step for-OOH intermediate in OER over FeNi@Mo_(2)TiC_(2)T_(x)are much less than those on bare *** catalyst can be further used for overall water splitting in alkaline solution,realizing a current density of 50 mA·cm^(-2)at 1.74 *** work provides a facile strategy to achieve efficient and cheap catalysts for new energy production.

关键词： MXene FeNi water splitting electrocatalysis

STM study on micromorphology of pyrite and dynamic significance of ore-formation

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Chinese Science Bulletin 1999年第15期44卷 1401-1403,1442页

作者： Rong Ye Lunshan Zhao Zhesheng Ma yongli shen Xiaoping Zhao Chinese Acad Sci Inst Geochem Guiyang 550002 Peoples R China China Univ Geosci Beijing 100083 Peoples R China Jiangsu Univ Technol Zhanjiang 212000 Peoples R China

A careful scanning tunneling microscope (STM) observation has been made on the micromorphology structure of the crystal faces for a group of pyrites which include two types of pyrite specimens: natural pyrites, from the different stage of hydrothermal ore deposits and artificial crystal of pyrite. It has been discovered that there is a set of micromorphological structures on the surfaces of pyrite crystals, including pisolitic hillocks, lotus root-like hillocks and spiral steps. This study reveals that the micromorphology of pyrite crystals, which are closely related to thermodynamic conditions and dynamic environment of the ore-forming systems, carries a lot of genetic information.

关键词： STM micromorphology of pyrite dynamics of ore-forming processes.

Topology conversion of 1T MoS_(2) to S-doped 2H-MoTe_(2) nanosheets with Te vacancies for enhanced electrocatalytic hydrogen evolution

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Science China Materials 2021年第9期64卷 2202-2211页

作者： Yaqian Wang yongli shen Xiong Xiao Linxiu Dai Shuang Yao Changhua An Life and Health Institute Tianjin Key Laboratory of Organic Solar Cells and Photochemical ConversionSchool of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

Metastable 1T’MoTe_(2) has attracted much attention as a cost-effective electrocatalyst for hydrogen evolution reaction(HER)in recent ***,few studies were done over common stable 2 H phase because it often exhibits inferior ***,stable 2H MoTe_(2) with S-doped Te vacancies has been synthesized by one-step telluride conversion of 1T MoS_(2) at 700℃under Ar/H_(2) *** is demonstrated that the synergistic effect of S-doping and Te vacancies changes the electronic structures of the *** functional theory(DFT)studies show that plentiful electrons accumulate on the surface S atoms in S-doped Te vacancies of 2H MoTe_(2) catalyst,which may be as active sites to promote ***,the as-synthesized catalyst can be directly used as working electrode,and realizes current density of 100 mA cm^(-2) at overpotential of 217 mV with Tafel slope of 94 mV dec^(-1).This work stimulates intensive studies on the activation of inert phase of other nanocatalysts towards various reactions.

关键词： MoTe_(2) defect electrocatalysis hydrogen evolution

临时固结支撑在客运专线铁路连续梁0号块施工中的应用

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铁道标准设计 2009年第1期29卷 67-69页

作者：申永利中铁一局集团有限公司西安710054

介绍利用临时固结钢管混凝土墩柱作为支撑,在其上焊接牛腿,安装钢楔和托梁搭设平台,悬臂灌注客运专线连续梁0号块混凝土施工技术。对于悬臂灌注连续梁0号块位于复杂地形条件如河流、公路和铁路旁边、地基不易处理的地方和地势变化较大... 详细信息

介绍利用临时固结钢管混凝土墩柱作为支撑,在其上焊接牛腿,安装钢楔和托梁搭设平台,悬臂灌注客运专线连续梁0号块混凝土施工技术。对于悬臂灌注连续梁0号块位于复杂地形条件如河流、公路和铁路旁边、地基不易处理的地方和地势变化较大的不易搭设满堂支架时,可以推荐应用。

关键词：客运专线连续梁施工

Metal nanoparticles decorated CoFe-(oxy)hydroxysulfides nanosheets fabricated by a general strategy for electrocatalytic water splitting

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Journal of Energy Chemistry 2025年第1期100卷 26-38页

作者： Xiaodong Yang Haochen shen Xiaoming Xiao Zhichao Li Qi Zhou Wei Yang Bin Jiang yongli Sun Luhong Zhang Zhenhua Yan School of Chemical Engineering and Technology Tianjin University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

This study presents a novel method to fabricate metal-decorated,sulfur-doped layered double hydroxides （M/SLDH） through spontaneous redox and sulfurization *** developed Ag/SLDH and Pt/SLDH catalysts with abundant heterogeneous interfaces and hierarchical nanostructures demonstrated outstanding oxygen evolution reaction （OER） and hydrogen evolution reaction （HER） performance,achieving low overpotentials of 212 and 35 mV at 10 mA cm-2in 1 M KOH,*** both anode and cathode in water splitting,they required only 1.47 V to reach 10 mA cm-2and exhibited high structural robustness,maintaining stability at 1000 mA cm-2for 300 ***-situ Raman analysis revealed that the synergistic effects of metal nanoparticles and S doping significantly promote the transformation into the S-Co1-xFexOOH layer,which serves as the active phase for water ***,ultraviolet photoelectron spectroscopy （UPS） and density functional theory （DFT） analyses indicated that incorporating metal nanoparticles and S doping increase electron density near the Fermi level and reduce reaction energy barriers,thus enhancing intrinsic OER and HER *** study provides a scalable strategy for synthesizing high-performance electrocatalysts for water splitting,with promising potential for broader applications.

关键词： LDH Spontaneous reaction Metal nanoparticles Water splitting

原子分散的钪路易斯酸位点修饰氮化碳用于高效光催化合成过氧化氢

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Science China Materials 2023年第2期66卷 672-678页

作者：姚爽唐婷申勇立杨帆安长华 Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

光催化氧还原制备过氧化氢具有节能、环保等优点.然而,低活性以及低选择性的问题限制了其实际应用.基于金属离子耦合电子转移机制,本文通过浸渍-煅烧法合成了原子分散的钪路易斯酸位点修饰的氮化碳,光合成过氧化氢速率高达55μmol h^(-... 详细信息

光催化氧还原制备过氧化氢具有节能、环保等优点.然而,低活性以及低选择性的问题限制了其实际应用.基于金属离子耦合电子转移机制,本文通过浸渍-煅烧法合成了原子分散的钪路易斯酸位点修饰的氮化碳,光合成过氧化氢速率高达55μmol h^(-1),是氮化碳的6.2倍.光催化性能的提升归因于原子分散钪路易斯酸位点与·O_(2)^(-)结合,提高了O_(2)的得电子能力,减少了·O_(2)^(-)逆反应的发生,促进了氧还原反应进行.密度泛函理论模拟及Koutecky-Levich分析表明,钪原子的引入减少了O–O键的断裂,提高了合成过氧化氢的选择性.本研究提出了一种路易斯酸单金属位点光催化剂设计新概念,可同时提升催化反应活性及选择性.

关键词：路易斯酸光催化合成氮化碳氧还原反应过氧化氢光合成煅烧法还原制备

Synthesis of ultrathin Co2AlO4 nanosheets with oxygen vacancies for enhanced electrocatalytic oxygen evolution

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Science China Materials 2020年第1期63卷 91-99页

作者： Jiayang Wang yongli shen Guijuan Wei Wei Xi Xiaoming Ma Weiqing Zhang Peipei Zhu Changhua An Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

In this work, we reported the synthesis of twodimensional spinel structure of ultrathin Co2AlO4 nanosheets via dealloying and subsequent annealing processes. Oxygen vacancy defects were further introduced into Co2AlO4 nanosheets by a mild solvothermal reduction method, resulting in large electrochemical surface area and high active site densities, making the related Co atoms get electrons, and producing more empty orbitals. The positive charge of Co and Al atoms adjacent to the O vacancies in VO-rich Co2AlO4 reduced significantly, that is, more electrons are concentrated on the Co and Al atoms. Those electrons closed to the Fermi level have a promoting effect during the H2O activation. As a result, the obtained ultrathin Co2AlO4 nanosheets with oxygen vacancies show a low overpotential of 280 m V at the current density of 10 mA cm^-2 and a small Tafel slope of70.98 m V dec^-1. Moreover, it also displays a remarkable stability in alkaline solution, which is superior to most of the reported Co3O4 electrocatalysts. The present work paves a new way to achieve efficient new energetic materials for sustainable community.

关键词： Co2AlO4 nanosheets oxygen vacancies oxygen evolution

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白念珠菌脑膜炎1例

中华内科杂志 2024年第1期63卷 97-99页

作者：陶紫薇沈泳利翁亚丽南京医科大学第一附属医院感染病科南京210029 中国科学技术大学附属第一医院(安徽省立医院)感染病院感染科

侵袭性念珠菌病一般发生在免疫功能受损人群,且累及中枢神经系统的病例极为罕见。本文报道了1例免疫功能正常的年轻女性确诊白念珠菌脑膜炎的病例,患者经历了长达3年的抗真菌治疗,其间出现疾病复发、唑类药物全耐药和视力下降等后遗症,... 详细信息

侵袭性念珠菌病一般发生在免疫功能受损人群,且累及中枢神经系统的病例极为罕见。本文报道了1例免疫功能正常的年轻女性确诊白念珠菌脑膜炎的病例,患者经历了长达3年的抗真菌治疗,其间出现疾病复发、唑类药物全耐药和视力下降等后遗症,最终病情好转。本文分析这例罕见的白念珠菌脑膜炎病例、复杂的治疗过程和并发症,提高临床医师对该类疾病的认识。

关键词：念珠菌白色脑膜炎多药耐药视力障碍