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Cooperation between single atom catalyst and support to promote nitrogen electroreduction to ammonia:A theoretical insight

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Journal of Energy Chemistry 2024年第9期96卷 336-344页

作者： Wanying Guo Siyao Wang hongxia Wang Qinghai Cai Jingxiang Zhao College of Chemistry and Chemical Engineering Harbin Normal UniversityHarbin 150025HeilongjiangChina

The co-catalysis between single atom catalyst(SAC)and its support has recently emerged as a promising strategy to synergistically boost the catalytic activity of some complex electrochemical reactions,encompassing multiple intermediates and ***,we utilized defective BC_(3)monolayer-supported SACs as a prototype to investigate the cooperative effects of SACs and their support on the catalytic performance of the nitrogen reduction reaction(NRR)for ammonia(NH_(3))*** results showed that these SACs can be firmly stabilized on these defective BC_(3)supports with high stability against ***,co-activation of the inert N_(2)reactant was observed in certain embedded SACs and their neighboring B atoms on certain BC3 sheets due to the noticeable charge transfer and significant N–N bond *** high-throughput screening revealed that the Mo/DV_(CC)and W/DV_(CC)exhibit superior NRR catalytic performance,characterized by a low limiting potential of−0.33 and−0.43 V,respectively,which can be further increased under acid conditions based on the constant potential ***,varying NRR catalytic activities can be attributed to the differences in the valence state of active ***,further microkinetic modeling analysis displayed that the turnover frequency of N_(2)–to–NH_(3)conversion on Mo/DV_(CC)is as large as 1.20×10^(−3)s^(−1)site^(−1) at 700 K and 100 bar,thus guaranteeing its ultra-fast reaction *** results not only suggest promising advanced electrocatalysts for NRR but also offer an effective avenue to regulate the electrocatalytic performance via the co-catalytic metal–support interactions.

关键词： Co-catalysis Single atom catalyst Nitrogen reduction DFT computations

Discrimination of pharmacodynamic components and volatile compounds of Poria cocos cultivated with five different materials based on GC-IMS analysis

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Food Quality and Safety 2024年第1期8卷 135-144页

作者： Yinan Wang Fei Zhou Hui Wang Jinping Zhang hongxia Xu Research Institute of Subtropical Forestry Chinese Academy of ForestryHangzhouChina Chun‘an County Thousand-island Lake Forest Farm HangzhouChina

Objectives:The chemical constituents of Poria cocos grown with different substrates vary significantly;thus,identifying and comparing their biomarkers are *** and Methods:Herein,the chemical constituents of Poria cocos obtained with five different substrates were assessed using gas chromatography–ion mobility spectrometry(GC-IMS),high-performance liquid chromatography and multivariate statistical ***:The content of moisture,ash,alcohol-soluble matter,and heavy metals,except for those of the miscellaneous wood Poria cocos,conform to the specifications defined in the Chinese Pharmacopoeia(Edition 2020),and the polysaccharide contents are all greater than 57%.Conclusions:Based on GC-IMS and the established fingerprints,87 compounds were detected,70 of which were identified in each *** statistical analysis revealed seven compounds(two esters,three alcohols,and two aldehydes),which could be considered as potential marker compounds for discrimination.

关键词： Poria cocos cultivation material pharmacodynamic component gas chromatography-ion mobility spectrometry(GC-IMS) volatile compound.

重组牛碱性成纤维细胞生长因子辅助治疗凹陷性痤疮瘢痕的临床观察

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中国医学科学院学报 2022年第2期44卷 208-212页

作者：杜红霞胡媛媛信阳市中心医院皮肤科河南信阳464000 信阳市中心医院医疗美容科河南信阳464000

目的探讨重组牛碱性成纤维细胞生长因子辅助治疗对凹陷性痤疮瘢痕患者瘢痕改善情况及炎性因子的影响。方法采用随机数字表法将120例凹陷性痤疮瘢痕患者分为试验组和对照组。两组患者均接受CO_(2)点阵激光治疗,术后对照组常规涂抹红霉素... 详细信息

目的探讨重组牛碱性成纤维细胞生长因子辅助治疗对凹陷性痤疮瘢痕患者瘢痕改善情况及炎性因子的影响。方法采用随机数字表法将120例凹陷性痤疮瘢痕患者分为试验组和对照组。两组患者均接受CO_(2)点阵激光治疗,术后对照组常规涂抹红霉素眼膏,试验组术后涂抹重组牛碱性成纤维细胞生长因子凝胶。分析随访治疗1个月后的临床疗效、临床相关指标、治疗前后瘢痕改善情况、炎性因子水平及不良反应情况。结果治疗后试验组总有效率高于对照组(P=0.040),总不良反应发生率低于对照组(P=0.028)。与对照组比较,试验组患者红斑持续时间明显缩短(P=0.025),结痂时间(P=0.002)及水肿消退时间(P<0.001)均明显提前。与治疗前比较,治疗后试验组和对照组患者Goodman和Baron痤疮瘢痕分级1级比例明显升高(P=0.001,P=0.027),4级比例明显下降(P<0.001,P=0.034),且治疗后试验组1级比例高于对照组(P=0.031),4级比例低于对照组(P=0.031)。与治疗前比较,治疗后两组患者血清肿瘤坏死因子-α、白细胞介素-1β水平均降低(P均<0.001),且试验组低于对照组(P均<0.001)。结论在CO_(2)点阵激光治疗基础上辅以重组牛碱性成纤维细胞生长因子凝胶治疗,可更有效地改善凹陷性痤疮瘢痕患者面部瘢痕情况,缓解局部炎症反应,疗效好,不良反应少。

关键词：凹陷性痤疮瘢痕重组牛碱性成纤维细胞生长因子炎性因子不良反应

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IMAGE-BUILDING AND FRAMING PROCESSES OF AN ANTI-MOTHER/-WOMAN IN CICERO’S PRO CLUENTIO

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Journal of Ancient Civilizations 2024年第1期39卷 51-72,124页

作者： hongxia Zhang Elizabeth Webster IHAC NENUChangchun

In this case study we explore Cicero’s processes of framing and image-building regarding the concept of an anti-mother/-*** this we examine Cicero’s portrayal of Sassia,a woman who features as one of the main antagonists of his speech Pro *** analyse Cicero’s depiction of Sassia’s evilness towards her son,Cluentius,through the lens of frame and framing *** doing so,this case study aims to present a deeper understanding of Cicero’s stratagems(e.g.,priming,calling for action;nudging,pushing someone towards action;and affordance,offering a frame to act outside of or within)which were employed in order to devise a negative characterisation of *** application of this methodological approach to Cicero’s framing of Sassia provides a new scope for analysing not only the classical text itself but also for the analysis of ancient human society to which it belonged.

关键词： affordance Cicero frames&framing image-building nudging&priming Roman Republic stereotypes

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氨硼烷催化水解制氢

化学进展 2020年第12期32卷 1930-1951页

作者：姚淇露杜红霞卢章辉江西师范大学先进材料研究院/化学化工学院南昌330022

氢气作为全球公认的清洁能源载体,备受关注。寻找安全高效的储氢材料以转型到氢能社会是当前氢能应用面临最大的挑战之一。氨硼烷(NH3BH3,AB)具有非常高的储氢质量分数(19.6 wt%)和体积储氢密度(0.145 kgH2/L),因其在储氢和放氢性能方... 详细信息

氢气作为全球公认的清洁能源载体,备受关注。寻找安全高效的储氢材料以转型到氢能社会是当前氢能应用面临最大的挑战之一。氨硼烷(NH3BH3,AB)具有非常高的储氢质量分数(19.6 wt%)和体积储氢密度(0.145 kgH2/L),因其在储氢和放氢性能方面的显著优势,被认为是一种颇具应用潜力的化学储氢材料。氨硼烷能够通过热解、醇解和水解放出氢气。其中,氨硼烷水解制氢可以通过催化剂进行可控放氢,且具有反应条件温和、不产生CO(易使催化剂中毒)等优点,被认为是一种安全高效和实用性强的制氢技术。本文简要介绍了氨硼烷的性质和合成,阐述了氨硼烷水解制氢的机理,综述了近年来氨硼烷水解制氢催化剂的研究进展,分析了碱对氨硼烷水解制氢的促进作用,并讨论了水解产物回收利用问题。

关键词：化学储氢材料氨硼烷水解制氢催化剂

From seawater to hydrogen via direct photocatalytic vapor splitting: A review on device design and system integration

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Frontiers in Energy 2024年第3期18卷 291-307页

作者： hongxia LI Khaja WAHAB AHMED Mohamed A.ABDELSALAM Michael FOWLER Xiao-Yu WU Technology Innovation Institute Masdar CityAbu Dhabi 9639United Arab Emirates Department of Chemical Engineering University of WaterlooWaterlooON N2L 3G1Canada Department of Mechanical and Nuclear Engineering Khalifa University of Science and TechnologyAbu Dhabi 127788United Arab Emirates Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooON N2L 3G1Canada

Solar-driven hydrogen production from seawater attracts great interest for its emerging role in decarbonizing global energy consumption. Given the complexity of natural seawater content, photocatalytic vapor splitting offers a low-cost and safe solution, but with a very low solar-to-hydrogen conversion efficiency. With a focus on cutting-edge photothermal–photocatalytic device design and system integration, the recent research advances on vapor splitting from seawater, as well as industrial implementations in the past decades were reviewed. In addition, the design strategies of the key processes were reviewed, including vapor temperature and pressure control during solar thermal vapor generation from seawater, capillary-fed vaporization with salt repellent, and direct photocatalytic vapor splitting for hydrogen production. Moreover, the existing laboratory-scale and industrial-scale systems, and the integration principles and remaining challenges in the future seawater-to-hydrogen technology were discussed.

关键词： seawater hydrogen photocatalytic vapor splitting solar-driven

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利用工业锰渣中温固化硫化砷渣

环境工程学报 2017年第2期11卷 1136-1140页

作者：杜颖肖红霞卢琼杜冬云中南民族大学资源与环境科学学院武汉430074

利用工业锰渣通过中温煅烧对硫化砷渣进行固化,考察煅烧温度、铁盐、碱性激发剂、水灰比、养护时间对固化效果的影响。结果表明:煅烧对砷的挥发影响较大,但是能显著降低砷的浸出浓度。同时"锰渣-铁盐—碱性激发剂"所构建的固化体系对砷... 详细信息

利用工业锰渣通过中温煅烧对硫化砷渣进行固化,考察煅烧温度、铁盐、碱性激发剂、水灰比、养护时间对固化效果的影响。结果表明:煅烧对砷的挥发影响较大,但是能显著降低砷的浸出浓度。同时"锰渣-铁盐—碱性激发剂"所构建的固化体系对砷具有很强的束缚能力。当硫化砷渣、锰渣、氧化钙、碳酸钙、氢氧化钠、硫酸铁和硫酸亚铁质量比为6∶1∶0.8∶0.05∶0.1∶0.5∶1时,在550℃下煅烧2 h,养护28 d,砷的浸出浓度为4.4 mg·L^(-1),达到危险废物填埋污染控制标准。

关键词：废物处理环境污染锰渣碱性激发剂硫化砷渣

不同水位梯度下拉鲁湿地典型湿草甸植物群落特征

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植物资源与环境学报 2018年第1期27卷 11-16页

作者：王丽杨涛杜红霞张军西安建筑科技大学环境与市政工程学院西北水资源与环境生态教育部重点实验室陕西省环境工程重点实验室陕西西安710055 中国电建集团西北勘测设计研究院有限公司环保与安评设计院陕西西安710065

以位于拉鲁湿地国家级自然保护区的高寒湿草甸为研究对象,基于微地貌差异选取了5个水位带(水位分别为-15.0、-5.0、0.0、2.5和6.5 cm),通过典型样地群落调查,分析了生长初期和生长旺盛期拉鲁湿地湿草甸植物群落的物种多样性及地上部分... 详细信息

以位于拉鲁湿地国家级自然保护区的高寒湿草甸为研究对象,基于微地貌差异选取了5个水位带(水位分别为-15.0、-5.0、0.0、2.5和6.5 cm),通过典型样地群落调查,分析了生长初期和生长旺盛期拉鲁湿地湿草甸植物群落的物种多样性及地上部分生物量特征对水位梯度的响应规律。结果表明:生长初期和生长旺盛期不同水位下拉鲁湿地湿草甸植物群落的物种多样性及地上部分生物量特征均存在显著差异(P<0.05)。群落的物种丰富度指数、Simpson多样性指数、Shannon-Wiener多样性指数和Pielou均匀度指数总体上在-15.0 cm水位下最大,在6.5cm水位下最小。随着水位的升高,2个生长期群落的物种丰富度指数、Simpson多样性指数和Shannon-Wiener多样性指数总体上呈降低的趋势;生长初期Pielou均匀度指数呈先降低后升高的趋势,而生长旺盛期则呈"降低—升高—降低"的趋势;而在-5.0~2.5 cm水位范围内,随着水位的升高,2个生长期群落的物种丰富度指数、Simpson多样性指数、Shannon-Wiener多样性指数和Pielou均匀度指数总体上呈升高的趋势。随着水位的升高,群落的地上部分生物量(地上部分鲜质量和干质量)呈"升高—降低—升高"的趋势,而地上部分干鲜比呈降低的趋势。在生长初期,地上部分鲜质量和干质量均在6.5 cm水位下最大,在-15.0和0.0 cm水位下较小;在生长旺盛期,地上部分鲜质量和干质量均在-5.0 cm水位下最大,在0.0和2.5 cm水位下较小。研究结果显示:物种丰富度指数和Shannon-Wiener多样性指数可以用于高寒湿草甸植被的监测和评价。

关键词：水位梯度高寒湿草甸物种多样性地上部分生物量

基于超图神经网络以多角度概念特征融合的概念先决学习

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中文信息学报 2023年第12期37卷 155-166页

作者：张鹏杜洪霞代劲重庆邮电大学软件工程学院智能信息技术与服务创新实验室重庆400065

概念之间的先决条件关系是智慧教育领域开展个性化学习相关工作的基础性任务,具有至关重要的作用。现有研究中基于特征计算的方法依赖于手工特征提取,受限于本文结构,基于二元图结构方法则忽略了概念和文档对象两两之间的复杂高阶关系... 详细信息

概念之间的先决条件关系是智慧教育领域开展个性化学习相关工作的基础性任务,具有至关重要的作用。现有研究中基于特征计算的方法依赖于手工特征提取,受限于本文结构,基于二元图结构方法则忽略了概念和文档对象两两之间的复杂高阶关系。为了解决以上问题,该文提出HyperCPRL,基于超图编码高阶拓扑结构的能力,从三个角度构造基于概念结构、概念语义距离和文档-概念隶属关系三个超图,以捕捉建模对象之间具有的复杂关系特征,再融合三个超图结点表征,并利用自注意力机制在概念全域进一步挖掘先决关系,利用孪生网络实现先决关系预测。在四个真实数据集上进行了大量实验对比,HyperCPRL取得了较好的效果,且对包含低度概念样本的识别能力更强。

关键词：先决关系概念依赖超图关系识别