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Oxygen‑Coordinated Single Mn Sites for Efficient Electrocatalytic Nitrate Reduction to Ammonia

Nano-Micro Letters 2024年第1期16卷 147-159页

作者： Shengbo Zhang Yuankang Zha Yixing Ye Ke Li Yue lin lirong Zheng Guozhong Wang Yunxia Zhang Huajie Yin Tongfei Shi Haimin Zhang Laboratory of Materials Physics Centre for Environmental and Energy NanomaterialsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China Key Laboratory of Agricultural Sensors Ministry of AgricultureSchool of Information and ComputerAnhui Agricultural UniversityHefei 230026People’s Republic of China Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026People’s Republic of China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of Sciences19B Yuquan RoadBeijing 100049People’s Republic of China

Electrocatalytic nitrate reduction reaction has attracted increasing attention due to its goal of low carbon emission and environmental protection.Here,we report an efficient NitRR catalyst composed of single Mn sites with atomically dispersed oxygen(O)coordination on bacterial cellulose-converted graphitic carbon(Mn-O-C).Evidence of the atomically dispersed Mn-(O-C_(2))_(4)moieties embedding in the exposed basal plane of carbon surface is confirmed by X-ray absorption spectroscopy.As a result,the as-synthesized Mn-O-C catalyst exhibits superior NitRR activity with an NH_(3)yield rate(RNH_(3))of 1476.9±62.6μg h^(−1)cm^(−2)at−0.7 V(vs.reversible hydrogen electrode,RHE)and a faradaic efficiency(FE)of 89.0±3.8%at−0.5 V(vs.RHE)under ambient conditions.Further,when evaluated with a practical flow cell,Mn-O-C shows a high RNH_(3)of 3706.7±552.0μg h^(−1)cm^(−2)at a current density of 100 mA cm−2,2.5 times of that in the H cell.The in situ FT-IR and Raman spectroscopic studies combined with theoretical calculations indicate that the Mn-(O-C_(2))_(4)sites not only effectively inhibit the competitive hydrogen evolution reaction,but also greatly promote the adsorption and activation of nitrate(NO_(3)^(−)),thus boosting both the FE and selectivity of NH_(3)over Mn-(O-C_(2))_(4)sites.

关键词： Atomically dispersed Oxygen coordination Nitrate reduction reaction In situ spectroscopic studies Hydrogen evolution reaction

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Interfacial modification using the cross-linkable tannic acid for highly-efficient perovskite solar cells with excellent stability

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Journal of Energy Chemistry 2024年第4期91卷 236-244页

作者： Xing Gao lirong Rong Fei Wu Yen-Hung lin Ye Zeng Junhong Tan Rongxing He Cheng Zhong linna Zhu Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy School of Materials&EnergySouthwest UniversityChongqing 400715China Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Department of ChemistryWuhan UniversityWuhan 430072HubeiChina Key Laboratory of Luminescence Analysis and Molecular Sensing Ministry of EducationSchool of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China Department of Electronic and Computer Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloon 999077Hong KongChina State Key Laboratory of Advanced Displays and Optoelectronics Technologies The Hong Kong University of Science and TechnologyClear Water BayKowloon 999077Hong KongChina

Although the performance of perovskite solar cells(PSCs)has been dramatically increased in recent years,stability is still the main obstacle preventing the PSCs from being commercial.PSC device instability can be caused by a variety of reasons,including ions diffusion,surface and grain boundary defects,etc.In this work,the cross-linkable tannic acid(TA)is introduced to modify perovskite film through post-treatment method.The numerous organic functional groups(–OH and C=O)in TA can interact with the uncoordinated Pb^(2+)and I^(-)ions in perovskite,thus passivating defects and inhibiting ions diffusion.In addition,the formed TA network can absorb a small amount of the residual moisture inside the device to protect the perovskite layer.Furthermore,TA modification regulates the energy level of perovskite,and reduces interfacial charge recombination.Ultimately,following TA treatment,the device efficiency is increased significantly from 21.31%to 23.11%,with a decreased hysteresis effect.Notably,the treated device shows excellent air,thermal,and operational stability.In light of this,the readily available,inexpensive TA has the potential to operate as a multipurpose interfacial modifier to increase device efficiency while also enhancing device stability.

关键词： Tannic acid Defect passivation lons diffusion Hydrophilic Stability Perovskite solar cells

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Nickel-iron in the second coordination shell boost single-atomicsite iridium catalysts for high-performance urea electrooxidation

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Nano Research 2024年第5期17卷 3919-3926页

作者： Xiaoyu Chen Jiawei Wan Jing Chai Liang Zhang Fang Zhang Qinghua Zhang lin Gu lirong Zheng Ranbo Yu Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and DeliveryChinese Academy of SciencesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Center for Combustion Energy School of Vehicle and MobilityState Key Laboratory of Intelligent Green Vehicle and MobilityTsinghua UniversityBeijing 100084China Analysis and Testing Center Beijing Institute of TechnologyBeijing 100081China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Single-atom catalysts(SACs)with high catalytic activity as well as great stability are demonstrating great promotion in electrocatalytic energy conversion,which is also a big challenge to achieve.Herein,we proposed a facile synthetic strategy to construct nickel-iron bimetallic hydroxide nanoribbon stabilized single-atom iridium catalysts(Ir-NiFe-OH),where the nickel-iron hydroxide nanoribbon not only can serve as good electronic conductor,but also can well stabilize and fully expose single-atom sites.Adopted as catalyst for urea oxidation reaction(UOR),it exhibited excellent UOR performance that it only needed a low operated potential of 1.38 V to achieve the current density of 100 mA·cm^(-2).In-situ Fourier transform infrared spectroscopy,X-ray absorption spectrum,and density functional theory calculations proved that Ir species are active centers and the existence of both Ni and Fe in the local structure of Ir atom can optimize the d-band center of Ir species,promoting the adsorption of intermediates and desorption of products for UOR.The hydrogen evolution reaction(HER)/UOR electrocatalytic cell demanded voltages of 1.46 and 1.50 V to achieve 50 and 100 mA·cm^(-2),respectively,which demonstrated a higher activity and better stability than those of conventional catalysts.This work opens a new avenue to develop catalysts for UORs with boosted activity and stability.

关键词： single-atom iridium coordinate structure nanoribbon urea electrooxidation

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Preventive effect of Shenkang injection against high glucose-induced senescence of renal tubular cells

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Frontiers of Medicine 2019年第2期13卷 267-276页

作者： Biqiong Fu Jie Yang Jia Chen lirong lin Kehong Chen Weiwei Zhang Jianguo Zhang Yani He Department of Nephrology Daping HospitalArmy Medical UniversityChongqing 400042China

Shenkang injection (SKI) is a classic prescription composed of Radix Astragali, rhubarb, Astragalus, Safflower, and Salvia. This treatment was approved by the State Food and Drug Administration of China in 1999 for treatment of chronic kidney diseases based on good efficacy and safety. This study aimed to investigate the protective effect of SKI against high glucose (HG)-induced renal tubular cell senescence and its underlying mechanism. Primary renal proximal tubule epithelial cells were cultured in (1) control medium (control group), medium containing 5 mmol/L glucose;(2) mannitol medium (mannitol group), medium containing 5 mmol/L glucose, and 25 mmol/L mannitol;(3) HG medium (HG group) containing 30 mmol/L glucose;(4) SKI treatment at high (200 mg/L), medium (100 mg/L), or low (50 mg/L) concentration in HG medium (HG+ SKI group);or (5) 200 mg/L SKI treatment in control medium (control+ SKI group) for 72 h. HG-induced senescent cells showed the emergence of senescence associated heterochromatin foci, up-regulation of P16INK4 and cyclin D1, increased senescence-associated β-galactosidase activity, and elevated expression of membrane decoy receptor 2. SKI treatment potently prevented these changes in a dose-independent manner. SKI treatment prevented HG-induced up-regulation of pro-senescence molecule mammalian target of rapamycin and p66Shc and down-regulation of anti-senescence molecules klotho, sirt1, and peroxisome proliferator-activated receptor-g in renal tubular epithelial cells. SKI may be a novel strategy for protecting against HG-induced renal tubular cell senescence in treatment of diabetic nephropathy.

关键词： Shenkang injection senescence renal tubular epithelial cells diabetic nephropathy

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The soil configuration on granite residuals affects Benggang erosion by altering the soil water regime on the slope

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International Soil and Water Conservation Research 2021年第3期9卷 419-432页

作者： Xiaoqian Duan Yusong Deng Yu Tao Yangbo He lirong lin Jiazhou Chen Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River)of the Ministry of Agriculture College of Resources and EnvironmentHuazhong Agricultural UniversityWuhan430070People's Republic of China

A permanent collapsing gully,locally called Benggang,formed on slopes with deep granite red soil and is a type of unique gully erosion widely prevalent in southern China.Three different soil configurations(SC),ie,red-transition-sandy(SC I,the transition is the soil layer between the red soil and the sandy soil layer),transition-sandy(SC II)or sandy(SC III)are usually present in the soil profile of the Benggang slope.However,little attention has been paid to impacts of SCs on the triggering of Benggang erosion.In this study,we aimed to explore the relationships between soil water content(SWC)and triggering of Benggang erosion under different SC conditions.The soil properties of different soil layers were measured and the SWC at depths of 20,40,60,and 80 cm were monitored at 5-min intervals along a typical Benggang(SC I)during 2016-2018.The SWC of Benggang slopes with different SCs were simulated by VADOSE/W model.Results showed that the red soil layer had a higher water retention capacity and shear strength than the sandy soil layer.Even if the SWC is higher(e.g.,0.42 cm^(3)/cm^(3))at red soil layer or transition layer,the corresponding shear strength is greater than that of sandy soil layer with a lower SWC(e.g.,032 cm^(3)/cm^(3)).Relationships between shear strength and SWC of different soil layers indicate that Benggang erosion is triggered by an increase in the SWC in the deep sandy layer.Results also showed that differences exist in the SWC distribution among the different SCs.The SWC is higher in topsoil than in deeper soil in SC I and SC II,while in SC III,the opposite trend is observed.These results revealed that the presence of the red soil or transition layer can reduce the infiltration of rainwater into the deep sandy layer,thus can reduce the possibility of collapse.Our results show that the SC affects the stability of the headwall,and results provide great significances to guide the mitigation of Benggang erosion.

关键词： Saturated hydraulic conductivity Water retention capacity Shear strength VADOSE/W model

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中医临床预测模型研究方法学质量的系统评价

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中国循证医学杂志 2024年第3期24卷 312-321页

作者：景城阳冯琳李嘉琛梁立荣廖星中国中医科学院中医临床基础医学研究所循证医学基础研究室北京100700 首都医科大学附属北京朝阳医院北京市呼吸疾病研究所临床流行病学研究室北京100020

目的系统评价中医临床预测模型研究的方法学质量。方法计算机检索PubMed、Embase、Web of Science、CNKI、WanFang Data、VIP和SinoMed数据库,搜集与中医临床预测模型研究相关的文献,检索时限均从建库至2023年3月31日。由2名研究者独立... 详细信息

目的系统评价中医临床预测模型研究的方法学质量。方法计算机检索PubMed、Embase、Web of Science、CNKI、WanFang Data、VIP和SinoMed数据库,搜集与中医临床预测模型研究相关的文献,检索时限均从建库至2023年3月31日。由2名研究者独立筛选文献和提取资料,并基于预测模型偏倚风险评估工具PROBAST评价纳入研究的偏倚风险。结果共纳入113项中医临床预测模型研究(79项诊断模型研究和34项预后模型研究),其中111项(98.2%)研究存在高偏倚风险,各有1项(0.9%)研究为低偏倚风险和偏倚风险不清。统计分析领域被评为高偏倚风险的比例最高,其次是研究对象领域。由于特定研究信息的报告普遍缺失,大量研究在预测因子和预测结局领域中的偏倚风险不清。结论现有中医临床预测模型研究的方法学质量普遍较差,几乎均存在高偏倚风险。产生偏倚风险的原因包括非前瞻性设计的数据来源、结局定义包含预测因子、建模样本量不足、特征选择不合理、性能评估欠准确和内部验证方法错误。未来建模研究需针对模型的设计、构建、评价和验证进行全方位的方法学质量改进,并全面报告模型的所有关键信息,以促进其在医疗实践中的转化应用。

关键词：临床预测模型预测模型研究方法学质量系统评价中医

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劳动教育融入高职思政课实践教学的研究

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成才之路 2024年第6期 45-48页

作者：林丽榕福州职业技术学院福建福州350100

劳动教育融入思政课实践教学是新时代高职院校落实立德树人的重要支撑点,能提高学生的观察力、专注力,增强他们认知、理解和判断事物的能力。文章简述劳动教育在高职教育中的重要性,分析劳动教育与思政课融合的可行性,探讨劳动教育融入... 详细信息

劳动教育融入思政课实践教学是新时代高职院校落实立德树人的重要支撑点,能提高学生的观察力、专注力,增强他们认知、理解和判断事物的能力。文章简述劳动教育在高职教育中的重要性,分析劳动教育与思政课融合的可行性,探讨劳动教育融入高职思政课实践教学的策略,指出高职院校要做好四个方面:统筹规划,搭建一体化教学平台;整合分流,创新实践教学融合模式;靶向发力,完善实践教学评价机制;发挥教师的积极性、主动性、创造性。

关键词：高职院校劳动教育思政课实践教学立德树人

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基于CiteSpace的地名研究可视化分析

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现代语文 2024年第2期 66-76,F0002页

作者：张琳杜丽荣山东大学文化传播学院山东威海264209

以1990—2022年中国知网所刊发的地名研究文献为数据来源,借助CiteSpace软件对其进行可视化分析。其中,期刊文献有10311篇,博士、硕士学位论文文献有595篇。在相关调查数据统计的基础上,绘制出发文量、作者、研究机构等可视化图谱以及... 详细信息

以1990—2022年中国知网所刊发的地名研究文献为数据来源,借助CiteSpace软件对其进行可视化分析。其中,期刊文献有10311篇,博士、硕士学位论文文献有595篇。在相关调查数据统计的基础上,绘制出发文量、作者、研究机构等可视化图谱以及战略坐标图,剖析其关注度和新颖度。同时,结合地名研究著作、科研立项等状况,对地名的研究现状予以综合分析,并对今后地名研究的发展趋势进行预测。

关键词：地名研究 CiteSpace 中国知网可视化分析

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抗二肽基肽酶样蛋白-6抗体相关脑炎的诊断学特征并文献复习

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中华诊断学电子杂志 2024年第2期12卷 116-119页

作者：林立荣郝洪军内蒙古包钢医院神经内科包头014010 北京大学第一医院神经内科 100032

目的:探讨抗二肽基肽酶样蛋白-6(DPPX)抗体相关脑炎的诊断学特征。方法:回顾性分析2021年6月25日内蒙古包钢医院神经内科收治的1例血清抗DPPX抗体阳性患者的既往及现有临床资料,总结抗DPPX抗体相关脑炎的诊断学特征并复习相关文献。结果... 详细信息

目的:探讨抗二肽基肽酶样蛋白-6(DPPX)抗体相关脑炎的诊断学特征。方法:回顾性分析2021年6月25日内蒙古包钢医院神经内科收治的1例血清抗DPPX抗体阳性患者的既往及现有临床资料,总结抗DPPX抗体相关脑炎的诊断学特征并复习相关文献。结果:患者男性,53岁,因"右眼渐进性失明10 d"入院。眼科查体示双侧瞳孔不等大,左侧3.0 mm,右侧4.0 mm,右侧直接、间接光反射消失;右眼无光感,左眼0.4;眼底、黄斑区及眼底荧光造影未见异常;右眼视诱发未引出。头颅磁共振成像(MRI)未见新发梗死及占位性病变;动态脑电图大致正常;血清抗DPPX抗体++(1∶20滴度稀释),其他N-甲基-D-天冬氨酸(NMDA)受体脑炎抗体均阴性;脑脊液余项检查大致正常。住院期间给予营养神经治疗,住院6 d后下方视野有所恢复,有光感。出院诊断为抗DPPX抗体脑炎。患者既往于2018年3月8日因左侧肢体肌力减弱住院治疗,左侧肢体肌力为4级,左上肢痛觉减退,余查体阴性。头颅MRI未见新发梗死;颈部MRI示颈5/6水平髓内占位,诊断为星形细胞瘤,未予特殊治疗,自行康复锻炼,2020年3月左侧肢体肌力及感觉均完全恢复正常。结论:本例抗DPPX抗体脑炎患者以偏侧肢体肌力减弱起病,且两次临床症状均有不同程度自行缓解情况,进一步证明该病可能存在自限性。

关键词：二肽基肽酶样蛋白自身抗体脑炎钾通道诊断

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全二维气相色谱-质谱法在新污染物筛查中的应用

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科学通报 2024年第6期69卷 672-687页

作者：程欣高丽荣张潆心曹小颖乔林刘杨艾俏锋郑明辉中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室北京100085 中国科学院大学资源与环境学院北京100049 国科大杭州高等研究院环境学院杭州310024

随着化学工业的发展,新化学物质在人类日常活动中不断涌现.新化学物质会在生产、加工、使用以及含新化学品废物处理等过程中向环境中释放,形成新污染物,而目前识别的新污染物种类是非常有限的,其对人体造成的健康效应还缺少全面评估.因... 详细信息

随着化学工业的发展,新化学物质在人类日常活动中不断涌现.新化学物质会在生产、加工、使用以及含新化学品废物处理等过程中向环境中释放,形成新污染物,而目前识别的新污染物种类是非常有限的,其对人体造成的健康效应还缺少全面评估.因此,精准识别环境中的新污染物,评估其环境与健康风险是环境保护领域的一项具有挑战性的工作.全二维色谱-高分辨质谱法是筛查并鉴别环境中新污染物的有力工具,近年来在环境分析领域得到广泛应用.以“全二维气相色谱”为关键词在Web of Science核心合集数据库中检索相关文献得到约3000条结果.基于全二维气相色谱(GC×GC)的优异分离能力,其主要用于挥发性、半挥发性新污染物筛查.本文综述了基于全二维气相色谱-质谱法的新污染物筛查方法(疑似筛查和非靶向筛查)及流程,包括样品制备、仪器分析、数据处理、化合物结构鉴定和风险评估5个步骤.同时,总结了近10年来全二维气相色谱-质谱法在筛查不同环境基质中(包括水、空气、土壤、沉积物和生物等)新污染物取得的进展.最后,本文提出了全二维气相色谱-质谱法在筛查环境中的新污染物中面临的挑战以及未来的发展趋势.

关键词：全二维气相色谱质谱新污染物非靶向筛查

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