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Metal-encapsulated nitrogen-doped carbon nanotube arrays electrode for enhancing sulfion oxidation reaction and hydrogen evolution reaction by regulating of intermediate adsorption

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Chinese Chemical Letters 2024年第8期35卷 533-538页

作者： Xiao Li Wanqiang Yu Yujie Wang Ruiying Liu Qingquan Yu Riming Hu Xuchuan Jiang qingsheng gao Hong Liu Jiayuan Yu Weijia Zhou Institute for Advanced Interdisciplinary Research(iAIR) School of Chemistry and Chemical EngineeringUniversity of JinanJi’nan 250022China Institute for Smart Materials&Engineering School of Materials Science and EngineeringUniversity of JinanJi’nan 250022China College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 510632China State Key Laboratory of Crystal Materials Shandong UniversityJi’nan 250100China

For treatment of sulfion-containing wastewater,coupling the electrochemical sulfion oxidation reaction(SOR)with hydrogen evolution reaction(HER)can be an ideal way for sulfur and H_(2)resources ***,we synthesize a metal-modified carbon nanotube arrays electrode(Co@N-CNTs/CC)for SOR and *** electrode has excellent performance for SOR and HER attributed to the unique array *** can achieve 99.36 mA/cm^(2)at 0.6 V for SOR,and 10 mA/cm^(2)at 0.067 V for *** functional theory calculations verify that metal modification is able to regulate the electronic structure of carbon nanotube,which is able to optimize the adsorption of *** Co@N-CNTs/CC as bifunctional elec-trodes to establish a hybrid electrolytic cell can reduce about 67%of energy consumption compared with the traditional water splitting electrolytic ***,the hybrid electrolytic cell is used to treat actual sulfion-containing wastewater,achieving the sulfur yield of 30 mg h^(−1)cm^(−2)and the hydrogen production of 0.64 mL/min.

关键词： Sulfion oxidation reaction Hydrogen evolution reaction Nitrogen-doping carbon nanotube Core-shell structure Resource upgrade

Co-N-C氧还原反应电催化剂的制备及性能研究

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复旦学报（自然科学版） 2024年第2期63卷 199-208,215页

作者：宋昱扬张文彪高庆生暨南大学化学与材料学院广东广州511400

锌空气电池可作为一种无污染、长效、稳定可靠的电源,但其阴极氧还原反应(Oxygen Reduction Reaction, ORR)缓慢的动力学过程严重阻碍了大规模应用。本文通过表面活化策略在炭黑上构筑不饱和位点用于锚定Co,再以不同质量比的尿素作为氮... 详细信息

锌空气电池可作为一种无污染、长效、稳定可靠的电源,但其阴极氧还原反应(Oxygen Reduction Reaction, ORR)缓慢的动力学过程严重阻碍了大规模应用。本文通过表面活化策略在炭黑上构筑不饱和位点用于锚定Co,再以不同质量比的尿素作为氮源,制备了不同氮掺杂量的催化剂,并测试了一系列催化剂的ORR活性,及其在不同电解液中活性的差异。将催化剂用于组装锌空气电池,开路电压达1.441 V,并表现出良好的放电性能,峰值功率密度可达123.5 mW·cm^(-2)。

关键词：氧还原反应钴基氮掺杂碳催化剂锌空气电池

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高熵电催化剂超快速高温合成的研究进展

科学通报 2024年第25期69卷 3715-3727页

作者：冯磊陈艺中许招芬谭静雯高庆生暨南大学化学与材料学院广州510632

高熵材料在电催化应用中引起极大的关注.然而,高熵材料的合理设计及制造与合成技术密切相关.与传统合成技术不同,超快速高温合成策略利用特殊的动力学条件,制备具有非热力学平衡结构的高熵电催化剂,并获得优异的催化性能.本文首先阐述... 详细信息

高熵材料在电催化应用中引起极大的关注.然而,高熵材料的合理设计及制造与合成技术密切相关.与传统合成技术不同,超快速高温合成策略利用特殊的动力学条件,制备具有非热力学平衡结构的高熵电催化剂,并获得优异的催化性能.本文首先阐述了高熵材料的熵理论,并介绍了焦耳快速加热、微波辅助技术、激光烧蚀与喷雾快速热解等一系列超快速高温合成技术,比较了这些合成技术的机理与优缺点.其次,全面分析了高熵合金、高熵氧化物、高熵碳化物及高熵硫化物的亚稳态结构与电催化性能的内在关联,以此证明超快速高温合成策略的电催化应用潜力.最后,对超快速高温合成策略的未来技术发展方向进行了展望,并指出了其在制备高熵材料过程中存在的挑战.本文对合成高性能电催化剂具有重要意义.

关键词：超快速高温合成熵理论高熵电催化剂电催化应用

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冷却塔风机驱动系统改造

氯碱工业 2024年第8期60卷 14-16页

作者：高庆胜王世辉唐山三友氯碱有限责任公司河北唐山063305 河北省聚氯乙烯技术创新中心河北唐山063305

原冷却塔风机驱动系统采用了三相异步电动机+传动轴+减速机的结构形式。该驱动系统存在的主要问题是:具有一定的机械效率损失;组成部件较多,故障点多。对驱动系统进行了改造,采用直联永磁电动机替换了原驱动系统,风机叶片可直接安装在... 详细信息

原冷却塔风机驱动系统采用了三相异步电动机+传动轴+减速机的结构形式。该驱动系统存在的主要问题是:具有一定的机械效率损失;组成部件较多,故障点多。对驱动系统进行了改造,采用直联永磁电动机替换了原驱动系统,风机叶片可直接安装在该驱动装置上,无需减速机及联轴器,减少电能消耗、故障点及维修成本。

关键词：冷却塔风机直联永磁电动机减速机联轴器

In-situ reconstruction of catalysts in cathodic electrocatalysis: New insights into active-site structures and working mechanisms

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Journal of Energy Chemistry 2022年第7期31卷 414-436,I0011页

作者： Wenbiao Zhang Yang Yang Yi Tang qingsheng gao College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 510632GuangdongChina Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsLaboratory of Advanced Materials and Collaborative Innovation Center of Chemistry for Energy Materials(iCHEM)Fudan UniversityShanghai 200433China

Cathodic electrocatalytic reactions, such as hydrogen evolution and CO_(2)/N_(2) reduction, are the key processes that store intermittent electricity into stable chemical energy. Although a great progress has been made to boost activity and selectivity via elaborative catalyst design, the structure–property relationships have not been sufficiently understood in the context of surface reconfiguration under working conditions. Recent efforts devoted to tracking dynamic evolution of electrocatalysts using in-situ and/or operando techniques gave new insights into the real structure and working mechanism of active sites,and provided principles to design better catalysts. The achievement of cathodic electrocatalysts in this subject is herein summarized, focusing on the correlations between reconstructed surface and electrocatalytic performance. Briefly, the thermodynamics of reconstruction at cathodes is discussed at first, and then the representative progresses in H_(2) evolution and CO_(2)/N_(2) reduction are introduced in sequence to acquire insights into electrochemical processes on in-situ reconfigured surfaces or interfaces. Finally, a perspective is offered to guide future investigations. This review is anticipated to shed some new light on in-depth understanding cathodic electrocatalysis and exploiting prominent electrocatalysts.

关键词： Hydrogen evolution reaction CO_(2)reduction reaction Nitrogen reduction reaction In-situ reconstruction Electronic configurations Valence states Topological changes

Recent advances of two-dimensional CoFe layered-double-hydroxides for electrocatalytic water oxidation

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Chinese Chemical Letters 2022年第6期33卷 2845-2855页

作者： Yi Zhou Jialai Hu Lichun Yang qingsheng gao College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 510632China School of Materials Science and Engineering and Guangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhou 510640China Ningbo Fengcheng Advanced Energy Materials Research Institute Co. Ltd.Ningbo 315000China

Oxygen evolution reaction(OER)is pivotal to drive green hydrogen generation from water electrolysis,but yet is strictly overshadowed by the sluggish reaction ***-abundant and cut-price transitionmetal compounds,particularly Co Fe layered-double-hydroxides(LDHs),show the distinct superiorities in contrast to noble metals and their *** this review,we firstly underline their fundamental issues in electrocatalytic water oxidation,including Co Fe LDHs crystal structure,the surface of(hydr)oxides confined to OER and the controversial roles of Fe species,aiming at understanding the structure-related activity and catalytic *** approaches for optimizing OER activity of Co Fe LDHs are then comprehensively overviewed,which will shed light on the different working mechanisms and provide a concise analysis of their unique ***,a perspective on the future development of Co Fe LDHs electrocatalysts is *** hope this review can give a concise and explicit guidance for the development of transition-metal-based electrocatalysts in the energy field.

关键词： CoFe layered-double-hydroxides Electrocatalytic water oxidation Two-dimensional nanostructures Surface reconstruction d-band

Phase Engineering of CoMo0_(4)Anode Materials toward Improved Cycle Life for Li^(+)Storage

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Chinese Journal of Chemistry 2021年第5期39卷 1121-1128页

作者： Xiaoqing Huang Junhao Li Wenbiao Zhang Wenjie Huang Lichun Yang qingsheng gao College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhouGuangdong 510632China School of Materials Science and Engineering and Guangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhouGuangdong 510641China

Anode materials based on conversion reactions usually possess high energy densities for lithium-ion batteries(LIBs).However,they suffer from poor rate performance and cycle life due to serious volume ***,α/β-CoMo04 heterogeneous nanorods are synthesized via a facile co-precipitation method,and further are phase-engineered through varying calcination temperature,accomplishing the obviously improved cycle life and rate performance as anodes for *** evaluated at a current density of 1.0 A·g^(-1)the optimal nanorods with anα/βphase ratio of 6.0 afford the reversible capacity of 1143.6 mAh·g^(-1)after 200 cycles,outperforming most of recently reported bimetal ***^(+)storage mechanism is further analyzed by using in-situ X-ray diffraction and ex-situ transition electronic ***'s revealed thatβ-CoMoO_(4)follows a one-step conversion reaction;whileα-CoMo0_(4)proceeds an intercalation pathway before the conversion *** storage of Li^(+)would alleviate the volume effect of heterostructuredα/β-CoMo0_(4),forming electronically conductive network evenly composed of Co and Mo nanograins to enable the reversible electrochemical *** work is anticipated to give some hints for the rational design of high-performance energy materials.

关键词： Electrochemistry Anode materials Bimetal oxides Crystal engineering Reaction mechanisms

基于水雾在线冷却的钛合金激光焊接应力变形研究

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电焊机 2024年第6期54卷 80-86页

作者：高庆生章文亮庄明祥叶泽涛刘永强占小红中航西安飞机工业集团股份有限公司陕西西安710089 南京航空航天大学材料科学与技术学院江苏南京211106

为解决TC4钛合金薄板激光焊接后因残余应力引起的变形问题,选用500 mm×50 mm×1.2 mm规格的TC4钛合金薄板作为研究对象,通过激光焊接并应用水雾在线冷却法进行同步冷却。保持激光功率、焊接速度、离焦量等焊接工艺参数一致,仅改变水雾... 详细信息

为解决TC4钛合金薄板激光焊接后因残余应力引起的变形问题,选用500 mm×50 mm×1.2 mm规格的TC4钛合金薄板作为研究对象,通过激光焊接并应用水雾在线冷却法进行同步冷却。保持激光功率、焊接速度、离焦量等焊接工艺参数一致,仅改变水雾压力,以研究不同冷却条件下的应力变形控制效果。结果表明,在水雾压力为0.4 MPa、激光功率800 W、焊接速度1.3 m/min、离焦量0 mm的条件下,与自然冷却相比,焊后残余应力降低了29%,最大纵向挠曲变形量减少17.6%;水雾冷却下的焊缝组织尺寸更细小,分布更规整有序。试验证明,水雾在线冷却法能有效改善TC4钛合金薄板激光焊接后的残余应力和变形问题,还可以促进马氏体相变,使焊缝的网篮状组织更加规整有序,从而提升接头的力学性能。

关键词：激光焊接水雾冷却焊接变形残余应力 TC4钛合金

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Revealing Real Facet Effect（{100}, {110} and {111}） of Palladium Nanocrystals for Biosensing

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Revealing Real Facet Effect（{100}, {110} and {111}） of Pal...