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Pt single atoms coupled with Ru nanoclusters enable robust hydrogen oxidation for high-performance anion exchange membrane fuel cells

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Nano Research 2024年第7期17卷 6147-6156页

作者： Jianmei Wang Bingxing Zhang Xiaozhong Zheng xuerui liu Wei Guo Zhouxin Luo Yongfeng liu Mingxia Gao Jian Chen Zhongbin Zhuang Hongge Pan Wenping Sun School of Materials Science and Engineering Zhejiang UniversityHangzhou 310058China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China State Key Lab of Organic–Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China

The sluggish reaction kinetics of alkaline hydrogen oxidation reaction(HOR)is one of the key challenges for anion exchange membrane fuel cells(AEMFCs).To achieve robust alkaline HOR with minimized cost,we developed a single atom-cluster multiscale structure with isolated Pt single atoms anchored on Ru nanoclusters supported on nitrogen-doped carbon nanosheets(Pt1-Ru/NC).The well-defined structure not only provides multiple sites with varied affinity with the intermediates but also enables simultaneous modulation of different sites via interfacial *** addition to weakening Ru–H bond strength,the isolated Pt sites are heavily involved in hydrogen adsorption and synergistically accelerate the Volmer step with the help of Ru ***,this catalyst configuration inhibits the excessive occupancy of oxygen-containing species on Ru sites and facilitates the HOR at elevated *** Pt1-Ru/NC catalyst exhibits superior alkaline HOR performance with extremely high activity and excellent *** AEMFC with a 0.1 mg·cmPGM^(−2)loading of Pt1-Ru/NC anode catalyst achieves a peak powder density of 1172 mW·cm^(−2),which is 2.17 and 1.55 times higher than that of Pt/C and PtRu/C,*** work provides a new catalyst concept to address the sluggish kinetics of electrocatalytic reactions containing multiple intermediates and elemental steps.

关键词： nanoclusters multiscale structure hydrogen oxidation reaction electrocatalysis anion exchange membrane fuel cells

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The difference of the ionomer–catalyst interfaces for poly(aryl piperidinium)hydroxide exchange membrane fuel cells and proton exchange membrane fuel cells

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Nano Research 2024年第7期17卷 6102-6110页

作者： xuerui liu Xingdong Wang Chanyu Zhang Yun Cai Bowen Chen Dongyue Xin Xiaoxiao Jin Wei Zhu Klaus Wippermann Hui Li Ruiyu Li Zhongbin Zhuang Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China State Key Lab of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Research Institute of Petroleum Processing SINOPECBeijing 100083China DeepHytec Co. Ltd.Shenzhen 518118China Institute of Energy and Climate Research(IEK-14) Forschungszentrum Jülich GmbHJülich 52425Germany Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

The microstructures of the ionomer–catalyst interfaces in the catalyst layers are important for the fuel cell performance because they determine the distribution of the active triple-phase ***,we investigate the ionomer–catalyst interactions in hydroxide exchange membrane fuel cells(HEMFCs)using poly(aryl piperidinium)and compare them with proton exchange membrane fuel cells(PEMFCs).It is found that different catalyst layer microstructures are between the two types of fuel *** ionomer/carbon(I/C)ratio does not have a remarkable impact on the HEMFC performance,while it has a strong impact on the PEMFC performance,indicating the weaker interaction between the HEMFC ionomer and *** dynamics simulations demonstrate that the HEMFC ionomer tends to distribute on the carbon support,unlike the PEMFC ionomer,which heavily covers the Pt *** results suggest that the poisoning effect of the ionomer on the catalyst is much weaker in HEMFCs,and the improved ionomer/catalyst interaction is beneficial for the HEMFC performances.

关键词： hydroxide exchange membrane fuel cells catalysts ionomer oxygen reduction reaction interfaces

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自动化技术在电力企业中的应用

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今日自动化 2024年第2期 12-13,16页

作者：刘雪瑞国网山东省电力公司梁山县供电公司山东济宁272600

文章以自动化技术在电力企业中的应用为重点展开分析,探讨了其应用场景,论述了其应用方式、应用过程中借助的重点技术及应用优势,并展望了其应用趋势,以服务电力企业建设。

关键词：电气自动化控制技术电力企业信息管理

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数字经济时代休闲时空行为研究现状与展望

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四川师范大学学报（自然科学版） 2024年第4期47卷 469-480页

作者：刘雪蕊孙红雯东南大学人文学院旅游学系江苏南京211189

中国已迈入数字经济时代.居民的休闲行为成为现代城市生活必不可少的组成部分.基于时空行为研究范式来创新现有的休闲理论体系,结合中国实际总结休闲时空行为,是数字经济时代中国人本城镇建设面临的迫切现实需求.围绕休闲时空行为研究... 详细信息

中国已迈入数字经济时代.居民的休闲行为成为现代城市生活必不可少的组成部分.基于时空行为研究范式来创新现有的休闲理论体系,结合中国实际总结休闲时空行为,是数字经济时代中国人本城镇建设面临的迫切现实需求.围绕休闲时空行为研究的最新发展与创新以及前沿问题展开系统梳理,面向数字经济时代居民休闲时空行为的变化,提出休闲时空行为研究的若干前沿命题,为中国休闲时空行为研究提供理论支撑和实践思路.数字经济时代下休闲时空行为研究的核心依旧是研究主题的确立,尤其是理论层面的问题.通过多学科的协同、不同类型数据的融合,实现理论和方法突破,为中国数字化发展与智慧城市建设奠定基础.

关键词：数字经济时空行为休闲行为信息和通信技术

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生防链霉菌菌株S16鉴定和防蔬菜根肿病的潜力评价

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植物病理学报 2024年第2期54卷 410-418页

作者：贺赛雅袁加升周星海刘学瑞魏兰芳姬广海云南农业大学省部共建云南生物资源保护与利用国家重点实验室云南昆明650201 云南农业大学农科基础实验教学中心云南昆明650201

【目的】为了寻找新的生防资源应对日益严重十字花科蔬菜根肿病。【方法】本实验从根肿病重病田仅存的几株健康白菜的根际土壤中,通过培养组学分离到485株细菌,以辣椒疫霉Phytophthora capsici为指示菌,利用平板对峙和温室盆栽试验筛选... 详细信息

【目的】为了寻找新的生防资源应对日益严重十字花科蔬菜根肿病。【方法】本实验从根肿病重病田仅存的几株健康白菜的根际土壤中,通过培养组学分离到485株细菌,以辣椒疫霉Phytophthora capsici为指示菌,利用平板对峙和温室盆栽试验筛选对白菜根肿病的生防菌株,并通过形态学特征、16S rDNA序列对其进行鉴定,利用热处理、酸碱处理、紫外线处理和蛋白酶K处理对生防菌的稳定性进行测定,同时利用平板对峙的方法测定了该菌的抑菌谱。【结果】通过对峙培养筛选获得46株有抑菌效果的生防菌株,并利用盆栽实验进行复筛,获得1株对白菜根肿病具有较好防治效果的菌株,命名为S16。该菌株S16对60℃以上的高温比较敏感;对紫外线照射不敏感,有较强的UV稳定性;pH在4~8处理后稳定性较好,且酶处理对菌株产生的抗菌物质几乎没影响。结合形态学特征和系统发育分析结果将该菌株鉴定为灰色橙黄链霉菌Streptomyces griseoaurantiacus。S16对辣椒疫霉***等8种病原真菌具有抑制效果,抑菌谱较广,对白菜根肿病的盆栽防效达到68.74%。【结论】表明灰色橙黄链霉菌S16对十字花科根肿病具有显著的防效,可作为生防菌进一步开发利用。

关键词：十字花科蔬菜根肿病灰色橙黄链霉菌生物防治

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碳材料活化过硫酸盐降解有机污染物的研究进展

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浙江化工 2024年第1期55卷 41-45页

作者：刘雪瑞曲建华东北农业大学黑龙江哈尔滨150010

基于过硫酸盐的高级氧化技术具有操作简单、高效环保等优点,碳材料活化过硫酸盐被广泛应用于有机污染物的降解过程中。碳材料表面富含多孔结构、各种活性官能团且其本身具有优异的导电性和化学稳定性,能够有效地活化过硫酸盐通过自由基... 详细信息

基于过硫酸盐的高级氧化技术具有操作简单、高效环保等优点,碳材料活化过硫酸盐被广泛应用于有机污染物的降解过程中。碳材料表面富含多孔结构、各种活性官能团且其本身具有优异的导电性和化学稳定性,能够有效地活化过硫酸盐通过自由基或非自由基途径降解有机污染物,在催化领域发挥出较大的应用潜力,有望成为新一代的绿色催化剂。本文综述了石墨烯、碳纳米管、活性炭、生物炭以及石墨相氮化碳在过硫酸盐高级氧化中的实际应用。

关键词：过硫酸盐石墨烯碳纳米管活性炭生物炭石墨相氮化碳

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中药有效成分调控氧化应激防治骨关节炎的研究进展

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中国实验方剂学杂志 2024年第11期30卷 282-289页

作者：张爽毕映燕刘晓婷宫玉锁刘学睿元宝华禄成龙陈绪帆王莹光佳如甘肃省中医院兰州730000 甘肃中医药大学兰州730000 宁夏回族自治区体育科学技术中心银川750001

骨关节炎(OA)是常见的退行性关节疾病,发病率逐年攀升,治疗常以镇痛类及非甾体抗炎药为主,长期使用易造成胃肠损伤,出现病情反复的现象。中药防治OA历史悠久,应用广泛、不良反应少,具有治疗范围广、多靶点、多途径等独特优势。中药有效... 详细信息

骨关节炎(OA)是常见的退行性关节疾病,发病率逐年攀升,治疗常以镇痛类及非甾体抗炎药为主,长期使用易造成胃肠损伤,出现病情反复的现象。中药防治OA历史悠久,应用广泛、不良反应少,具有治疗范围广、多靶点、多途径等独特优势。中药有效成分通过干预氧化应激(OS)反应生物标志物丙二醛(MDA)和超氧化物歧化酶(SOD)表达,降低活性氧(ROS)含量,减轻OS损伤,增加机体的抗氧化能力,通过调控核因子E2相关因子2(Nrf2)/血红素氧合酶-1(HO-1)、磷脂酰肌醇3-激酶(PI3K)/蛋白激酶B(Akt)、核转录因子-κB(NF-κB)、c-Jun氨基末端激酶(JNK)、NOD样受体蛋白3(NLRP3)和骨保护素(OPG)等信号通路,下调白细胞介素-6(IL-6)、白细胞介素-1β(IL-1β)和肿瘤坏死因子-α(TNF-α)等炎症因子表达,有效缓解关节局部炎症反应,保护软骨细胞与骨组织,抑制软骨细胞凋亡,进一步缓解OA疾病发展进程。目前OA医学研究现状与发展趋势仍存在一定局限,需要继续发展中医药事业,该文对中药有效成分调控OS反应以防治OA的相关文献报道进行综述,为后续研究提供新的方向和思路。

关键词：中药有效成分氧化应激抗氧化骨关节炎

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Defective Ni_(3)S_(2)nanowires as highly active electrocatalysts for ethanol oxidative upgrading

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Nano Research 2022年第4期15卷 2987-2993页

作者： Yufeng Zhang Wei Zhu Jinjie Fang Zhiyuan Xu Yanrong Xue Di liu Rui Sui Qingqing Lv xuerui liu Yongsheng Wang Wei Chen Zhongbin Zhuang State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

Electrochemical upgrading of biomass ethanol to value-added chemicals is promising for sustainable ***,we synthesize defective Ni_(3)S_(2) nanowires(NWs),which show high activity towards electrochemical oxidation of ethanol to *** Ni_(3)S_(2) NWs are formed by the oriented attachment mechanism,and rich defects are introduced during the growth.A low onset potential of 1.31 V and high mass activity of 8,716 mA·mgNi^(-1) at 1.5 V are achieved using the synthesized Ni_(3)S_(2) NWs toward the ethanol electro-oxidation,which are better than the Ni(OH)2 NWs and the Ni_(3)S_(2) nanoparticles(NPs).And the selectivity for the acetate generation is ca.99%.The high activity of Ni_(3)S_(2) NWs is attributed to the easier oxidation of Ni(II)to the catalytically active Ni(III)species with the promotion from S component and rich *** results demonstrate that the defective NWs can be synthesized by the oriented attachment method and the defective Ni_(3)S_(2) NWs structure as the efficient nonnoble metal electrocatalysts for oxidative upgrading of ethanol.

关键词： nickel sulfide electrocatalyst ethanol oxidation defects oriented attachment

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Silver based single atom catalyst with heteroatom coordination environment as high performance oxygen reduction reaction catalyst

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Nano Research 2022年第9期15卷 7968-7975页

作者： Rui Sui Xuejiang Zhang Xingdong Wang Xinyu Wang Jiajing Pei Yufeng Zhang xuerui liu Wenxing Chen Wei Zhu Zhongbin Zhuang State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China International Clean Energy Research Office China Three Gorges CorporationBeijing 100038China Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

Ag is a potential low-cost oxygen reduction reaction(ORR)catalyst in alkaline condition,which is important for the zinc-air ***,we report that an Ag based single atom catalyst with heteroatom ***1-h-NPClSC,has been synthesized and shown much improved performance towards ORR by manipulating the coordination environment of the Ag *** shows a high half wave potential(0.896 V)and a high turnover frequency(TOF)(5.9 s^(−1))at 0.85 V,which are higher than the previously reported Ag based catalysts and commercial Pt/C.A zinc-air battery with high peak power density of 270 mW·cm^(−2)is fabricated by using the Ag1-h-NPClSC as air *** high performance is attributed to(1)the hollow structure providing good mass transfer;(2)the single atom metal center structure providing high utility of the Ag;(3)heteroatom coordination environment providing the adjusted binding to the ORR *** functional theory(DFT)calculations show that the energy barrier for the formation of OOH*,which is considered as the rate determine step for ORR on Ag nanoparticles,is lowered on Ag1-h-NPClSC,thus improving the ORR *** work demonstrates that the well manipulated Ag based single atom catalysts are promising in electrocatalysis.

关键词： Ag single-atom heteroatom coordination oxygen reduction zinc-air battery

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Complementary and alternative medicine on cognitive defects and neuroinflammation after sepsis

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Journal of Traditional Chinese Medicine 2024年第2期44卷 408-416页

作者： LI Zhenxuan WANG xuerui Luis Ulloa Ayman Youssef BAI Yunjing XU Xiaolong liu Qingquan Department of Infectious Diseases Beijing Hospital of Traditional Chinese MedicineCapital Medical UniversityBeijing 100010China Beijing Key Laboratory of Basic Research with Traditional Chinese Medicine on Infectious Diseases Beijing 100010China Infection immunity laboratory Beijing Institute of Traditional Chinese MedicineBeijing 100010China Clinical College of Traditional Chinese Medicine Capital Medical UniversityBeijing 100069China Center for Perioperative Organ Protection Department of AnesthesiologyDuke University Medical CenterDurhamNorth Carolina 27710USA

Sepsis-associated encephalopathy(SAE)is a common manifestation of sepsis,ranging from mild confusion and delirium to severe cognitive impairment and deep *** is associated with higher mortality and long-term outcomes,particularly substantial declines in cognitive *** mechanisms of SAE probably include neuroinflammation that is mediated by systemic inflammation and ischemic lesions in the brain,a disrupted blood–brain barrier,oxidative stress,neurotransmitter dysfunction,and severe microglial *** evidence suggests that complementary and alternative medicine,especially Traditional Chinese Medicine(TCM),is favorable in alleviating cognitive decline after ***,we summarized the studies of traditional herbal remedies,TCM formulas and acupuncture therapy in animal models of neurological dysfunctions after sepsis in recent decades and reviewed their potential mechanisms.

关键词： sepsis-associated encephalopathy cognitive dysfunction complementary therapies neuroinflammatory diseases medicine Chinese traditional review

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