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FeTe_(2) as an earth-abundant metal telluride catalyst for electrocatalytic nitrogen fixation

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Journal of Energy Chemistry 2021年第5期30卷 259-263页

作者： Yali Guo yonghua cheng Qingqing Li Ke Chu School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070GansuChina

Design of cost-effective,yet highly active electrocatalysts for nitrogen reduction reaction(NRR)is of vital significance for sustainable electrochemical NH_(3) ***,we have demonstrated,from both computational and experimental perspectives,that FeTe_(2) can be an efficient and durable NRR *** computations unveil that FeTe_(2) possesses abundant surface-terminated and low-coordinate Fe sites that can activate the NRR with a low limiting potential(-0.84 V)and currently impede the competing hydrogen evolution *** a proof-of-concept prototype,we synthesized FeTe_(2) nanoparticles supported on reduced graphene oxide(FeTe_(2)/RGO),which exhibited a high NRR activity with the exceptional combination of NH_(3) yield(39.2 lg h^(-1) mg^(-1))and Faradaic efficiency(18.1%),thus demonstrating the feasibility of using FeTe_(2) and other earth-abundant metal tellurides for electrocatalytic N_(2) fixation.

关键词： Electrocatalytic nitrogen reduction Fe catalysts Tellurides Density functional theory

MXene Quantum Dots/Copper Nanocomposites for Synergistically Enhanced N_(2)Electroreduction

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Energy & Environmental Materials 2023年第1期6卷 192-198页

作者： yonghua cheng Xingchuan Li Peng Shen Yali Guo Ke Chu School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070China

Electrocatalytic N_(2) reduction reaction(NRR)represents an appealing solution for sustainable ammonia production,whereas exploring high-efficiency NRR catalysts is highly desired but extremely ***,we combine Ti_(3) C_(2)T_(x)-MXene quantum dots(MQDs)with porous Cu nanosheets to design a novel heterostructured MQDs/Cu as an effective and durable NRR ***,MQDs/Cu showed a synergistically enhanced NRR activity with an NH_(3) yield of 78.5 lg h^(-1) mg^(-1)(-0.5 V)and a Faradaic efficiency of 21.3%(-0.4 V),far superior to pure MQDs and Cu,and outperforming the majority of the state-of-the-art NRR *** function theory computations demonstrated that the synergy of MQDs and Cu enabled the creation of interfacial Cu-Ti dimer as dual-active-centers to strongly activate the absorbed N 2 and promote the*N_(2)H formation,consequently resulting in the much reduced energy barriers and greatly enhanced NRR performance.

关键词： density functional theory electrocatalytic nitrogen fixation heterostructure MXene quantum dots

Zn nanosheets:An earth-abundant metallic catalyst for efficient electrochemical ammonia synthesis

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Journal of Energy Chemistry 2021年第3期30卷 318-322页

作者： Qingqing Li Jing Wang yonghua cheng Ke Chu School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070GansuChina

Ammonia(NH_(3)),a critical raw material for various industrial chemicals,is also recognized as a clean and efficient energy carrier for the future energy economy[1].However,the industrial-scale production of NH_(3) strongly relies on the Haber-Bosch process,which involves massive fuel consumption and enormous greenhouse gas emissions[2].Therefore,there is an urgent need to develop sustainable and energy-saving alternative routes for artificial NH3 production.

关键词： Electrocatalytic nitrogen fixation Metallic catalysts Zn nanosheets N2 activation First-principle calculations

基于“一源三岐”理论探讨子宫结合带异常的针药并施辨治思路

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中医药导报 2024年第10期30卷 168-171页

作者：程永华史云唐莹王慧颖北京中医药大学东直门医院北京100700 北京中医药大学深圳医院(龙岗) 广东深圳518172

子宫结合带是T2加权磁共振成像(MRT)中子宫内膜和子宫肌层之间的低信号带状结构,其结构或功能异常会导致众多妇科疾病,而有月经紊乱、痛经、不孕等临床表现。“一源三岐”理论首见于《儒门事亲》,该书总结并概括了冲任督三脉与胞宫在女... 详细信息

子宫结合带是T2加权磁共振成像(MRT)中子宫内膜和子宫肌层之间的低信号带状结构,其结构或功能异常会导致众多妇科疾病,而有月经紊乱、痛经、不孕等临床表现。“一源三岐”理论首见于《儒门事亲》,该书总结并概括了冲任督三脉与胞宫在女性正常生理中的重要作用。基于“一源三岐”理论,子宫结合带异常病位在胞宫,而与冲任带三脉密切相关,治疗时应顺应月经周期,分期论治,使冲盛任通、督阳充足,并加以引经药直达病所,合用针刺进一步加强益气填精、通调三脉之功,以收良效。

关键词：子宫结合带一源三岐针药并施

Single-atom metal-nitrogen-carbon catalysts energize single molecule detection for biosensing

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InfoMat 2023年第6期5卷 44-65页

作者： Xianyang Zhang Pengfei Chen Siwuxie He Bowen Jiang Yong Wang yonghua cheng Jian Peng Francis Verpoort John Wang Zongkui Kou State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanthe People's Republic of China “ZhuCai”Center of Innovation and Entrepreneurship Wuhan University of TechnologyWuhanthe People's Republic of China West China School of Pharmacy Sichuan UniversityChengduthe People's Republic of China Department of Materials Science and Engineering Faculty of EngineeringNational University of SingaporeSingapore Institute of Materials Research and Engineering A*StarSingapore

Biosensors featuring single molecule detection present huge opportunities as well as challenges in food safety inspection,disease diagnosis,and environmental ***-molecule detection is largely lacking of high enough activity,precision molecule selectivity,and understanding in the exact operating ***-atom catalysts(SACs),especially those metals-nitrogen-carbon that mimic the natural metalloenzyme structure,and with well-defined metal atom bond configurations,high level of molecular selectivity,and easy fabrication,endow single molecule detections with practical-use *** recent advances in single-atom catalysts also present new pathways in the key mechanism *** this short review,we will first visit the brief history and advantages of SACs that have been explored only recently for molecule-scale biosensors,where they are analogous and also differentiated from those nanozymes and natural *** applications in electrochemical,photochemical,and photoelectrochemical sensors are then discussed comprehensively by focusing on the different molecule-scale sensing modes in achieving local coordination-modulated signal ***,we identify new opportunities and challenges faced by these SACs-based single molecule detections in the further development of biosensors.

关键词： biosensors metal-nitrogen-carbon nanozyme single molecule detection single-atom catalysts

ADSORPTION BEHAVIOR OF Pb(II) ON POTASSIUM HEXATITANATE WHISKER BY FAAS

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Chinese Journal of Reactive Polymers 2008年第1期17卷 48-54页

作者： cheng yonghua XU Wanzhen YAN Yongsneng JING Junjie College of Chemistry Pingdingshan University Pingdingshan 467000 China School of Chemistry and Chemical Engineering Jiangsu University Zhenjiang 212013 China

Based on the advantage of high surface area and strong adsorption ability of potassium hexatitanate whisker, a method to determine trace Pb(II) content by combining solid phase extraction with Flame atomic absorption spectrometry (FAAS) was established. The adsorptive behavior of potassium hexatitanate whisker to Pb(II), primary influencing factors of adsorption and elution and effect of coexistence ions were investigated systemically. The optimal analytical conditions were discussed and examined. It was found that the adsorption rate of potassium hexatitanate whisker to Pb(II) was 100% at pH 4.0. Pb(II) could be eluted from potassium tetratitanate whisker with HCl (2mol/L) under boiling water for 30min. The detection limit was 5.75ng/mL, and relative standard deviation was 1.66% (n=9, CPb=2.0μg/mL).

关键词： Adsorption behavior Pb(II) Potassium hexatitanate whisker FAAS.

基于PLC的煤矿空压机变频调速系统优化设计

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煤矿机械 2019年第4期40卷 173-175页

作者：成咏华张冉唐山工业职业技术学院河北唐山063299

针对煤矿空压机组运行存在耗电量大、运行效率与可靠性低、机电设备维护和管理难度大等问题,利用S7系列PLC设计空压机变频调速控制系统。系统采用上、下位机监控框架,分别开发支持空压机组优化的软、硬件系统。以风包压力为实际控制对象... 详细信息

针对煤矿空压机组运行存在耗电量大、运行效率与可靠性低、机电设备维护和管理难度大等问题,利用S7系列PLC设计空压机变频调速控制系统。系统采用上、下位机监控框架,分别开发支持空压机组优化的软、硬件系统。以风包压力为实际控制对象,上位机S7-300利用模糊算法确认各空压机组的功率输出,在线整定PID参数,下位机S7-200对空压机组进行变频调速,适应井下风动负荷的动态变化。该系统实现了对空压机组运行状态的在线监控,系统运行平稳可靠,提高了空压机组的自动化控制水平。

关键词：煤矿空压机 PLC 变频调速系统模糊控制 PID控制

The initial experience of circumferential pulmonary vein isolation combined with autonomic ganglia modification for paroxysmal atrial fibrillation

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The initial experience of circumferential pulmonary vein iso...

The role of gut microbiota associated metabolites in digestive disorders

中华医学会心电生理和起搏分会第十次全国学术年会

作者： Jinlin Zhang,Xi su,cheng Tang,yonghua Zhang Department of Cardiology,Wuhan Asian Heart Hospital 430060

Objective The purpose of this study was to compare GP and circumferential pulmonary vei n isolation with PV isolation alone for treatment of paroxysmal AF. Methods 52 patients with paroxysmal AF were randomized to either circumferential pulmonary vein isolation(PV group) or anatomic GP modification followed by PV isolation(GP+PV group). Identification of GP by high frequency stimulation using a Grass stimulator(S88X USA) at 20 Hz with a pulse width of 10 ms at 12 to 24 *** ablation target sites were identified as the places where vagal reflexes were evoked. Resuits In both group,successful PV isolation was achieved in all patients using circumferential pulmonary vein antrium ablation approach,In GP+PV group,A mean of 39±10 HF stimulations were delivered to each patient,positive responses were elicited in 4±2 GP sites per patient.A mean of 5.2±2.8 RF applications were delivered over each targeted site with a vagal *** and HRV parameters showed significant changes over time for all *** of arrhythmia was documented in 42.3% patients in the PV group versus 13.5%patients in the GP+PV after a follow-up of 10.7±3.4 months after ablation(P<0.01) Conclusion Addition of anatomic GP modification to PV isolation confers significantly better outcomes than PV isolation alone for paroxysmal AF.

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Engineered Regeneration 2024年第2期5卷 228-246页

作者： Na Li cheng Zhao Pingnan Zhang Songting Wu Xiaotan Dou Saifei Xu Xiaoqi Zhang Chunyan Peng Ying Xie Shuling Huang Lin Zhou yonghua Shen Lei Wang Jinglin Wang chenggong Yu Department of Gastroenterology Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjing210008China Division of Hepatobiliary and Transplantation Surgery Department of Gernal SurgeryNanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjing210008China

The gut has been a focal point in the research of digestive system *** internal microbiota generates metabolites that function as signaling molecules and substrates,interacting with the intestinal wall and influ-encing host physiology and ***,the gut microbiota and metabolites owe highly diverse types and quantities,posing challenges for quantitative analysis,and monitoring frequent interactions between diges-tive tract metabolites and the intestinal wall remains a ***,research targeting gut microbiota metabolites has elucidated their relevance to digestive *** modulating metabolites such as short-chain fatty acids,bile acids,and lipopolysaccharides,it is possible to intervene in the progression of diseases such as inflammatory bowel disease and non-alcoholic fatty liver ***,research on gut microbiota is advancing,and more work is required to explore the interactions between host,microbes and underlying *** this review,we have revisited the generation of gut microbiota-related metabolites,their impact on diseases,and modes of interaction,emphasizing the significant role of metabolites in digestive system *** is believed that the linkage between gut microbiota and diseases in current research can be established through metabolites,providing a framework and foundation for research in the field of metabolomics and fundamental mechanisms.

关键词： Gut microbial metabolites Digestive disorders Inflammatory bowel disease(IBD) Non-alcoholic fatty liver disease(NAFLD)