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Nano Research 2024年第6期17卷 5073-5079页

作者： Ge Yu Ruilong Li Yida Zhang Xingen Lin gongming wang Xun Hong Center of Advanced Nanocatalysis(CAN) Department of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China National Synchrotron Radiation Laboratory(NSRL) University of Science and Technology of ChinaHefei 230029China

IrRu bimetallic oxides are recognized as the promising acidic oxygen evolution reaction(OER)catalysts,but breaking the trade-off between their activity and stability is an unresolved ***,addressing the issues of mass transport obstruction of IrRu bimetallic oxides under high current remains a challenge for the development of proton exchange membrane water electrolysis(PEM-WE).Herein,we prepared an IrRuO_(x)nanomeshes(IrRuO_(x)NMs)with high coordination number(CN)of Ir-O-Ru bonds in a mixed molten salt with high solubility of the Ir/Ru precursor.X-ray absorption spectroscopy analysis revealed that the IrRuO_(x)NMs possess high coordination number of Ir-O-Ru bonds(CNIr-O-Ru=5.6)with a distance of 3.18Å.Moreover,the nanomesh structures of IrRuO_(x)NMs provided hierarchical channels to accelerate the transport of oxygen and water,thus further improving the electrochemical ***,the IrRuO_(x)NMs as OER catalysts can simultaneously achieve high activity and stability with low overpotential of 196 mV to reach 10 mA·cm^(−2)and slightly increase by 70 mV over 650 h *** electrochemical mass spectrometry tests suggest that the preferred OER mechanism for IrRuO_(x)NMs is the adsorbent evolution mechanism,which is beneficial for the robust structural stability.

关键词： oxygen evolution reaction IrRuO_(x) Ir-O-Ru bonds two-dimensional(2D)nanomesh proton exchange membrane device mass transport

Manipulating photogenerated electron flow in nickel single‐atom catalysts for photocatalytic CO_(2)reduction into tunable syngas

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Carbon Energy 2024年第8期6卷 205-213页

作者： Yida Zhang Qingyu wang Lihui Wu Haibin Pan Chengyuan Liu Yue Lin gongming wang Xusheng Zheng National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefeiAnhuiChina College of Chemistry and Materials Science University of Science and Technology of ChinaHefeiAnhuiChina Department of Chemistry Hefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefeiAnhuiChina

The key to designing photocatalysts is to orient the migration of photogenerated electrons to the target active sites rather than dissipate at inert ***,we demonstrate that the doping of phosphorus(P)significantly enriches photogenerated electrons at Ni active sites and enhances the performance for CO_(2)reduction into *** photocatalytic CO_(2)reduction,Ni single‐atom‐anchored P‐modulated carbon nitride showed an impressive syngas yield rate of 85μmol gcat^(−1)h^(−1)and continuously adjustable CO/H_(2)ratios ranging from 5:1 to 1:2,which exceeded those of most of the reported carbon nitride‐based single‐atom *** studies reveal that P doping improves the conductivity of catalysts,which promotes photogenerated electron transfer to the Ni active sites rather than dissipate randomly at low‐activity nonmetallic sites,facilitating the CO_(2)‐to‐syngas photoreduction process.

关键词： carbon nitride CO_(2)photoreduction electron flow Ni single atoms syngas

Supporting IrO_(x) nanosheets on hollow TiO_(2) for highly efficient acidic water splitting

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Nano Research 2024年第8期17卷 6903-6909页

作者： Ge Yu Ruilong Li Yanmin Hu Xingen Lin Ze Lin Dongyang Wu gongming wang Xun Hong Center of Advanced Nanocatalysis(CAN) Department of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China

The efficiency of proton exchange membrane water electrolysis(PEM-WE)for hydrogen production is heavily dependent on the noble metal iridium-based ***,the scarcity of iridium limits the large-scale application of *** address this issue,it is promising to select an appropriate support because it not only enhances the utilization efficiency of noble metals but also improves mass transport under high ***,we supported amorphous IrO_(x) nanosheets onto the hollow TiO_(2) sphere(denoted as IrO_(x)),which demonstrated excellent performance in acidic electrolytic water ***,the annealed IrO_(x)catalyst at 150℃in air exhibited a mass activity of 1347.5 A·gIr^(−1),which is much higher than that of commercial IrO_(2) of 12.33 A·gIr^(−1) at the overpotential of 300 mV for oxygen evolution reaction(OER).Meanwhile,the annealed IrO_(x) exhibited good stability for 600 h operating at 10 mA·cm^(−2).Moreover,when using IrO_(x) and annealed IrO_(x) catalysts for water splitting,a cell voltage as low as 1.485 V can be achieved at 10 mA·cm^(−2).The cell can continuously operate for 200 h with negligible degradation of performance.

关键词： oxygen evolution reaction hydrogen evolution reaction amorphous IrO_(x) hollow TiO_(2) proton exchange membrane water electrolysis

微液滴限域合成和调控空心多孔Ir基电解水催化剂及其传质促进作用

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Science Bulletin 2024年第8期69卷 1081-1090页

作者：刘丽黄婷杨晓良柳守杰汪顺生项琳琳王功名蒯龙 School of Chemical and Environmental Engineering Anhui Laboratory of Clean Catalytic EngineeringKey Laboratory of Production and Conversion of Green HydrogenAnhui Polytechnic UniversityWuhu 241000China Department of Chemistry University of Science and Technology of ChinaHefei 230026China School of Materials Science and Engineering Anhui UniversityHefei 230601China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China

Maximally exploiting the active sites of iridium catalysts is essential for building low-cost proton exchange membrane(PEM)electrolyzers for green H_(2)***,we report a novel microdrop-confined fusion/blasting(MCFB)strategy for fabricating porous hollow IrO_(1-x)microspheres(IrO_(1-x)-PHM)by introducing explosive gas mediators from a NaNO_(3)/glucose ***,the developed MCFB strategy is demonstrated to be general for synthesizing a series of Ir-based composites,including Ir-Cu,Ir-Ru,Ir-Pt,Ir-Rh,Ir-Pd,and Ir-Cu-Pd and other noble metals such as Rh,Ru,and *** hollow structures can be regulated using different organics with NaNO_(3).The assembled PEM electrolyzer with IrO_(1-x)-PHM as the anode catalyst(0.5 mg/cm^(2))displays an impressive polarization voltage of 1.593and 1.726 V at current densities of 1 and 2 A/cm^(2),respectively,outperforming commercial IrO_(x)catalysts and most of the ever-reported iridium catalysts with such low catalyst *** importantly,the breakdown of the polarization loss indicates that the improved performance is due to the facilitated mass transport induced by the *** study offers a versatile platform for fabricating efficient Irbased catalysts for PEM electrolyzers and beyond.

关键词： Microdrop-confined synthesis Porous hollow microspheres PEM electrolyzer Water splitting Mass transfer

Two-dimensional MOS2 for hydrogen evolution reaction catalysis: The electronic structure regulation

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Nano Research 2021年第6期14卷 1985-2002页

作者： Shuwen Niu Jinyan Cai gongming wang Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry University of Science and Technology of ChinaHefei230026China

Molybdenum disulfide (MoS2) has been recognized as one of the most promising candidates to replace precious Pt for hydrogen evolution reaction (HER) catalysis, due to the natural abundance, low cost, tunable electronic properties, and excellent chemical stability. Although notable processes have been achieved in the past decades, their performance is still far less than that of Pt. Searching effective strategies to boosting their HER performance is still the primary goal. In this review, the recent process of the electronic regulation of MoS2 for HER is summarized, including band structure engineering, electronic state modulation, orbital orientation regulation, interface engineering. Last, the key challenges and opportunities in the development of MoS2-based materials for electrochemical HER are also discussed.

关键词： hydrogen evolution reaction(HER) electronic structure modulation molybdenum disulfide density functional theory phase and interfacial engineering

艾司氯胺酮对小鼠脑缺血再灌注损伤的影响及其与线粒体应激的关系

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中华麻醉学杂志 2024年第2期44卷 176-181页

作者：王霞李培龙黄亚茹迟文英王公明孟凡军山东第一医科大学(山东省医学科学院)研究生部济南250117 山东第一医科大学附属中心医院烧伤整复外科济南250013 山东第一医科大学附属中心医院麻醉科济南250013 山东第一医科大学附属省立医院麻醉科济南250021

目的评价艾司氯胺酮对小鼠脑缺血再灌注损伤的影响及其与线粒体应激的关系。方法实验Ⅰ SPF级雄性C57BL/6小鼠18只,8~12周龄,体质量28~30 g,采用随机数字表法分为3组(n=6):假手术组(S组)、脑缺血再灌注组(IR组)和艾司氯胺酮+脑缺血再灌... 详细信息

目的评价艾司氯胺酮对小鼠脑缺血再灌注损伤的影响及其与线粒体应激的关系。方法实验Ⅰ SPF级雄性C57BL/6小鼠18只,8~12周龄,体质量28~30 g,采用随机数字表法分为3组(n=6):假手术组(S组)、脑缺血再灌注组(IR组)和艾司氯胺酮+脑缺血再灌注组(E+IR组)。采用大脑中动脉栓塞1 h,再灌注24 h的方法制备脑缺血再灌注损伤模型;E组造模前20 min腹腔注射艾司氯胺酮10 mg/kg。采用Zea Longa评分及平衡木实验(Feeney评分)评估小鼠神经功能;TTC染色法测定脑梗死体积。实验Ⅱ将原代皮层神经元采用随机数字表法分为3组(n=42):对照组(C组)、氧糖剥夺/复氧复糖组(OGD/R组)和艾司氯胺酮+OGD/R组(E+OGD/R组)。采用氧糖剥夺1 h,复氧复糖24 h的方法制备OGD/R模型。E+OGD/R组加入25 μmol/L艾司氯胺酮处理40 min后制备模型。采用CCK-8法检测神经元活力,透射电镜下观察神经元超微结构,检测ROS、谷胱甘肽过氧化物酶(GSH-px)和MDA的水平,JC-1试剂盒检测线粒体膜电位,TUNEL染色法测定神经元凋亡率,Western blot法测定Bax、细胞色素C(Cyt C)、cleaved-caspase-9、caspase-3和cleaved-caspase-3的表达。结果实验Ⅰ与S组相比,IR组Zea Longa评分、Feeney评分和脑梗死体积升高(P<0.01);与IR组相比,E+IR组Zea Longa评分、Feeney评分和脑梗死体积降低(P<0.01)。实验Ⅱ与C组相比,OGD/R组神经元活力和GSH-px活性降低,神经元凋亡率、ROS、MDA水平、线粒体膜电位和cleaved-caspase-3/caspase-3比值升高,Bax、Cyt C和cleaved-caspase-9表达上调(P<0.01);与OGD/R组相比,E+OGD/R组神经元活力和GSH-px活性升高,神经元凋亡率、ROS、MDA水平、线粒体膜电位和cleaved-caspase-3/caspase-3比值降低,Bax、Cyt C和cleaved-caspase-9表达下调(P<0.01)。结论艾司氯胺酮可减轻小鼠脑缺血再灌注损伤,其机制可能与抑制神经元线粒体应激,改善线粒体功能,抑制线粒体途径的神经元凋亡有关。

关键词：艾司氯胺酮再灌注损伤脑线粒体应激,生理学

Phosphorus incorporation activates the basal plane of tungsten disulfide for efficient hydrogen evolution catalysis

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Nano Research 2022年第4期15卷 2855-2861页

作者： Fan wang Shuwen Niu Xinqi Liang gongming wang Minghua Chen Key Laboratory of Engineering Dielectric and Applications(Ministry of Education) Harbin University of Science and TechnologyHarbin 150080China Department of Chemistry University of Science and Technology of ChinaHefei 230026China

The basal planes of transition metal dichalcogenides are basically inert for catalysis due to the absence of adsorption and activation sites,which substantially limit their catalytic ***,a facile strategy to activate the basal plane of WS_(2) for hydrogen evolution reaction(HER)catalysis by phosphorous-induced electron density modulation is *** optimized P doped WS_(2)(P-WS_(2))nanowires arrays deliver a low overpotential of 88 mV at 10 mA·cm^(-2)with a Tafel slope of 62 mV·dec^(-1)for HER,which is substantially better than the pristine counterpart.X-ray photoelectron spectroscopy confirms the surface electron densities of WS_(2) have been availably manipulated by P ***,density functional theory(DFT)studies further prove P doping can redistribute the density of states(DOS)around EF,which endow the inert basal plane of PWS_(2) with edge-like catalytic activity toward hydrogen evolution *** work offers a facile and effective approach to modulate the catalytic surface of WS_(2) toward highly efficient HER catalysis.

关键词： tungsten disulfide electronic structure modulator orbital orientation density of states redistribution hydrogen evolution reaction

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发酵技术在海藻功能性食品加工中的应用

食品与发酵工业 2024年第12期50卷 379-387页

作者：王冬晴马长伟王共明刘芳井月欣赵云苹张健矫春娜徐英江中国农业大学食品科学与营养工程学院北京100083 山东省海洋资源与环境研究院烟台市海珍品质量安全控制与精深加工重点实验室山东烟台264006

发酵是一种清洁、低能耗的传统食品加工技术,具有提高食品营养价值、延长食品货架期、产生特殊风味物质等优点。海藻作为海洋植物,生长过程不占用淡水和土地资源,是一种可持续的食物来源,众多研究者利用发酵技术处理海藻提高了其功能活... 详细信息

发酵是一种清洁、低能耗的传统食品加工技术,具有提高食品营养价值、延长食品货架期、产生特殊风味物质等优点。海藻作为海洋植物,生长过程不占用淡水和土地资源,是一种可持续的食物来源,众多研究者利用发酵技术处理海藻提高了其功能活性,产生了对人体健康有益的生物活性物质。该文综述了国内外海藻及海藻发酵技术的研究现状,系统总结了海藻发酵前后γ-氨基丁酸、多糖、酚类等化学成分的变化,归纳了海藻发酵后在抗氧化、降血糖、抗血栓等方面潜在的功能,梳理了目前已有的海藻发酵功能性食品,并对未来海藻发酵的发展方向提出构想,为开发具有特定功能活性的海藻发酵食品、扩大海藻产品的品类提供参考。

关键词：发酵技术海藻化学成分功能活性功能性食品

A nearest neighbor search algorithm of high-dimensional data based on sequential NPsim matrix

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High Technology Letters 2016年第3期22卷 241-247页

作者：李文法 wang gongming Ma Nan Liu Hongzhe Beijing Key Laboratory of Information Service Engineering Beijing Union University National Laboratory of Biomacromolecules Institute of BiophysicsChinese Academy of Sciences

Problems existin similarity measurement and index tree construction which affect the performance of nearest neighbor search of high-dimensional data. The equidistance problem is solved using NPsim function to calculate similarity. And a sequential NPsim matrix is built to improve indexing performance. To sum up the above innovations,a nearest neighbor search algorithm of high-dimensional data based on sequential NPsim matrix is proposed in comparison with the nearest neighbor search algorithms based on KD-tree or SR-tree on Munsell spectral data set. Experimental results show that the proposed algorithm similarity is better than that of other algorithms and searching speed is more than thousands times of others. In addition,the slow construction speed of sequential NPsim matrix can be increased by using parallel computing.

关键词： nearest neighbor search high-dimensional data similarity indexing tree NPsim KD-tree SR-tree Munsell

碱金属阳离子对硝酸根还原产氨反应的元素依赖性影响

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Science Bulletin 2024年第8期69卷 1100-1108页

作者：张意达马镇涛杨绍康王青雨刘利民柏彧饶德伟王功名李洪良郑旭升 National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China College of Chemistry and Materials Science Experimental Center of Engineering and Material ScienceUniversity of Science and Technology of ChinaHefei 230026China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China

Catalytic conversion of nitrate(NO_(3)^(-))pollutants into ammonia(NH_(3))offers a sustainable and promising route for both wastewater treatment and NH_(3)*** cations are prevalent in nitrate solutions,but their roles beyond charge balance in catalytic NO_(3)^(-)conversion have been generally ***,we report the promotion effect of K^(+)cations in KNO_(3)solution for NO_(3)^(-)reduction over a TiO_(2)-supported Ni single-atom catalyst(Ni_(1)/TiO_(2)).For photocatalytic NO_(3)^(-)reduction reaction,Ni_(1)/TiO_(2)exhibited a 1.9-fold NH_(3)yield rate with nearly 100%selectivity in KNO_(3)solution relative to that in NaNO_(3)*** studies reveal that the K^(+)cations from KNO_(3)gradually bonded with the surface of Ni_(1)/TiO_(2),in situ forming a K-O-Ni moiety during reaction,whereas the Na^(+)ions were unable to interact with the catalyst in NaNO_(3)*** charge accumulation on the Ni sites induced by the incorporation of K atom promoted the adsorption and activation of NO_(3)^(-).Furthermore,the K-O-Ni moiety facilitated the multiple proton-electron coupling of NO_(3)^(-)into NH_(3)by stabilizing the intermediates.

关键词： Nitrate reduction Alkali cations Potassium Ni single-atom catalyst Ammonia