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Nano Research 2024年第3期17卷 1107-1113页

作者： Jing Ni Zhaoping Shi Yibo Wang Jiahao Yang hongxiang wu Pengbo Wang Kai Li Meiling Xiao Changpeng Liu Wei Xing State Key Laboratory of Electroanalytic Chemistry Jilin Province Key Laboratory of Low Carbon Chemistry PowerChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

The scale-up deployment of ruthenium(Ru)-based oxygen evolution reaction(OER)electrocatalysts in proton exchange membrane water electrolysis(PEMWE)is greatly restricted by the poor *** the lattice-oxygen-mediated mechanism(LOM)has been identified as the major contributor to the fast performance degradation,impeding lattice oxygen diffusion to inhibit lattice oxygen participation is imperative,yet remains challenging due to the lack of efficient ***,we strategically regulate the bonding nature of Ru–O towards suppressed LOM via Ru-based high-entropy oxide(HEO)*** lattice disorder in HEOs is believed to increase migration energy barrier of lattice *** a result,the screened Ti_(23)Nb_(9)Hf_(13)W_(12)Ru_(43)O_(x) exhibits 11.7 times slower lattice oxygen diffusion rate,84%reduction in LOM ratio,and 29 times lifespan extension compared with the state-of-the-art RuO_(2) *** work opens up a feasible avenue to constructing stabilized Ru-based OER catalysts towards scalable application.

关键词： ruthenium-based high-entropy oxide suppressing the lattice oxygen diffusion acidic oxygen evolution reaction

Stabilizing high-efficiency iridium single atoms via lattice confinement for acidic oxygen evolution

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Nano Research 2024年第4期17卷 2492-2498页

作者： Yibo Wang Jiadong Jiang Zhaoping Shi hongxiang wu Jiahao Yang Pengbo Wang Shuai Hou Meiling Xiao Junjie Ge Changpeng Liu Wei Xing Laboratory of Advanced Power Sources Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026.China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Jilin Province Key Laboratory of Low Carbon Chemical Power Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Physics and Technology for Advanced Batteries Ministry of EducationCollege of PhysicsJilin UniversityChangchun 130012China

Stable and efficient single atom catalysts(SACs)are highly desirable yet challenging in catalyzing acidic oxygen evolution reaction(OER).Herein,we report a novel iridium single atom catalyst structure,with atomic Ir doped in tetragonal PdO matrix(IrSAs-PdO)via a lattice-confined *** optimized IrSAs-PdO-0.10 exhibited remarkable OER activity with an overpotential of 277 mV at 10 mA·cm^(-2) and long-term stability of 1000 h in 0.5 M H_(2)SO_(4).Furthermore,the turnover frequency attains 1.6 s^(-1) at an overpotential of 300 mV with a 24-fold increase in the intrinsic *** high activity originates from isolated iridium sites with low valence states and decreased Ir–O bonding covalency,and the excellent stability is a result of the effective confinement of iridium sites by Ir–O–Pd ***,we demonstrated for the first time that SACs have great potential in realizing ultralow loading of iridium(as low as microgram per square center meter level)in a practical water electrolyzer.

关键词： lattice confinement iridium single atoms ultralow iridium loading acidic oxygen evolution proton exchange membrane water electrolysis

Degradation mechanisms and stabilization strategies of ruthenium-based catalysts for OER in the proton exchange membrane water electrolyzer

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Progress in Natural Science:Materials International 2024年第1期34卷 207-222页

作者： Ming Yang hongxiang wu Zhaoping Shi Yibo Wang Jiahao Yang Jing Ni Pengbo Wang Yuqing Cheng Ziang Wang Meiling Xiao Changpeng Liu Wei Xing Laboratory of Advanced Power Sources Changchun Institute of Applied Chemistry Chinese Academy of Sciences School of Applied Chemistry and Engineering University of Science and Technology of China Jilin Province Key Laboratory of Low Carbon Chemical Power Sources State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences

Designing economical oxygen evolution reaction(OER) electrocatalysts with high activity and long-term stability is essential to promote the scale-up applications of proton exchange membrane water electrolyzer(PEMWE) for hydrogen production. Ruthenium(Ru)-based materials with high intrinsic activity are hailed as the most promising catalysts, but still infeasible for practical application considering their long unresolved poor stability(only dozens of lifespan). Thus, tremendous efforts have been devoted to uncovering the degradation mechanisms and developing stabilization strategies for the Ru-based catalysts. In this review, starting from summarizing the fundamental understanding of deactivation mechanisms, a picture of the stability issue of Ru-based catalysts is proposed, which is followed by a detailed discussion on the recently developed strategies and progress made on enhancing durability. Finally, insights on the prospects for the future development of stable and practical Rubased OER catalysts are provided.

关键词： OER Ru-based catalysts PEMWE Degradation mechanisms Stabilization strategies

Unraveling the potential-dependent degradation mechanism in Fe–N–C catalysts for oxygen reduction reaction

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Science China Chemistry 2024年

作者： Yuyi Chu Yuqing Cheng Pengbo Wang Jingsen Bai Xin Guan Shuo Wang Chang Lan hongxiang wu Zhaoping Shi Siyuan Zhu Wei Liu Changpeng Liu Meiling Xiao Wei Xing State Key Laboratory of Electroanalytic Chemistry Jilin Province Key Laboratory of Low Carbon Chemistry Power Changchun Institute of Applied Chemistry Chinese Academy of Sciences School of Applied Chemistry and Engineering University of Science and Technology of China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences

Fe–N–C is hailed as the most promising candidate for replacing costly platinum-based catalysts for proton-exchange membrane fuel cells(PEMFCs) owing to their impressive catalytic activity and low cost. However, the durability of Fe–N–C catalysts remains a major challenge, primarily due to an insufficient understanding of their degradation mechanisms. In this study, we monitor the real-time changes in the electrode during the oxygen reduction reaction(ORR), shedding light on the potentialdependent degradation mechanisms inherent to Fe–N–C catalysts. Utilizing in-situ differential electrochemical mass spectroscopy, we identify three distinct potential regions with varying degrees of performance loss, notably observing carbon corrosion signals at low potentials. Theoretical calculations and fluorescence probe experiments corroborate that degradation mechanisms at high potentials are primarily driven by strong oxidative potentials that overcome the carbon oxidation energy barrier, whereas the degradation at low potentials is predominantly caused by the high concentrations of reactive oxygen species(ROS) generated during the ORR. The potential-dependent carbon corrosion consequently leads to a similar dependence of demetallation of active sites on the working potential. This study offers a comprehensive understanding of the intrinsic interrelations among various degradation mechanisms, thus paving the way for enhancing the durability of Fe–N–C catalysts in PEMFC applications.

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生物质炭对农田土壤腐殖质的影响——Meta分析

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土壤 2024年第1期56卷 42-48页

作者：邓倩马娟娟孙西欢郑利剑武洪翔李旭峰安江龙太原理工大学水利科学与工程学院太原030024

为量化生物质炭对土壤腐殖质含量的影响程度,以不添加生物质炭土壤为对照,对不同土壤质地、土壤pH及生物质炭裂解温度、施用量、施用时长下生物质炭对土壤腐殖质含量的变化情况进行了Meta分析。结果表明:与对照相比,添加生物质炭显著提... 详细信息

为量化生物质炭对土壤腐殖质含量的影响程度,以不添加生物质炭土壤为对照,对不同土壤质地、土壤pH及生物质炭裂解温度、施用量、施用时长下生物质炭对土壤腐殖质含量的变化情况进行了Meta分析。结果表明:与对照相比,添加生物质炭显著提高了砂土腐殖质中的胡敏酸和胡敏素含量,平均提高幅度分别为18.6%和92.2%;增加了中性、碱性土壤中的胡敏酸含量,平均增幅分别为12.5%和13.7%;施用裂解温度为500~600℃的生物质炭对于土壤胡敏酸、富里酸和胡敏素含量的提升幅度最大,平均增幅分别为22.6%、14.1%和68.5%;生物质炭添加量为20~40 t/hm2条件下,显著提高了土壤胡敏酸、富里酸和胡敏素含量,平均增幅分别为23.7%、6.9%和84.6%;生物质炭施入土壤3个月内,胡敏酸含量显著升高,平均增幅为29.5%,在3个月到1年内增幅逐渐降低,1年后增幅又逐渐升高;生物质炭施入土壤6个月内,胡敏素含量增幅最高,平均为72.2%;随着生物质炭施用时间延长,土壤胡敏素含量的增幅逐渐降低。综上所述,施用裂解温度为500~600℃的生物质炭,在短期内对中性或碱性条件下的砂土及壤土中的腐殖质含量有较好的提升效果,随着施入时间的延长,该效果会逐渐稳定。

关键词：土壤腐殖质有机碳 Meta分析生物质炭

轴承钢GCr15宽钢带铸轧组织遗传对性能的影响

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连铸 2024年第4期 47-51,76页

作者：朱施利裘韶均贾国军张本亮吴红翔杨志强宁波钢铁有限公司技术中心浙江宁波315807

为研究轴承钢GCr15连铸和热轧过程中组织遗传对产品性能的影响,取含Ni轴承钢GCr15连铸坯、热轧中间坯和热轧宽钢带试样,采用金相显微镜、扫描电镜和拉伸试验机等手段,分别研究了边部、1/4处和中部试样的低倍组织、显微组织、晶粒度级别... 详细信息

为研究轴承钢GCr15连铸和热轧过程中组织遗传对产品性能的影响,取含Ni轴承钢GCr15连铸坯、热轧中间坯和热轧宽钢带试样,采用金相显微镜、扫描电镜和拉伸试验机等手段,分别研究了边部、1/4处和中部试样的低倍组织、显微组织、晶粒度级别、元素含量和力学性能,并观察了钢带拉伸断口形貌。结果表明,铸坯经轧制到热轧中间坯再到热轧钢带过程存在晶粒大小和显微组织遗传,钢带力学性能受到了遗传的影响。GCr15钢铸坯低倍组织致密,疏松级别为0.5级,无角裂和边裂;电磁搅拌圈痕外组织致密,圈内相对疏松。热轧中间坯和钢带从边部、1/4处到中部组织逐渐粗化、片层状珠光体趋于明显,中间坯晶粒度从2.5级、2.0级到1.5级,钢带晶粒度从12级、11级到10.5级。碳和铬在中间坯中间部位偏聚,中部碳偏析指数相对于均值为1.02,而相对于边部为1.04。钢带边部强度较高,抗拉强度R_(m)、屈服强度R_(p0.2)分别高出1/4处和中部约200、250 MPa。钢带不同位置断口都呈现为韧性断裂,1/4处试样的韧性优于边部和中部位置。

关键词：轴承钢GCr15 宽钢带铸轧组织遗传性能

Amide as Terminal Groups： Synthesis and Properties as New Tolane-Type Liquid Crystals

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Chinese Journal of Chemistry 2015年第7期33卷 771-776页

作者： Hong Zhang Fengying Hong Dezhao Zhu Zhengce Xia hongxiang wu Hui Wang Zhuo Zeng College of Chemistry & Environment South China Normal University Guangzhou Guangdong 510006 China Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

A series of novel tolane-type liquid crystals with amide group as terminal group have been prepared. The terminal amide groups were modified, and the influence of these structural parameters on liquid crystal phases was investigated by polarizing optical microscope （POM） and differential scanning calorimetry （DSC）. Three of these new compounds exhibit nematic phase, good thermal stabilities. In general, these liquid crystals with amide as end groups have high melting points and phase transition temperatures, which result from the hydrogen bonds. Based on theoretical calculations, these new molecules with strong electron donating amide as end group have narrower HOMO-LUMO energy gap and higher dipole moment than tolane.

关键词： amides liquid crystals mesophase phase transition

Inactivation efficiency of slightly acidic electrolyzed water against microbes on facility surfaces in a disinfection channel

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International Journal of Agricultural and Biological Engineering 2017年第6期10卷 23-30页

作者： Zang Yitian Li Baoming Shi Zhengxiang Sheng Xiaowei wu hongxiang Shu Dengqun College of Animal Science and Technology Jiangxi Agricultural UniversityNanchang 330045China Key Laboratory of Structure and Environment in Agricultural Engineering Ministry of AgricultureChina Agricultural UniversityBeijing 100083China

Slightly acidic electrolyzed water(SAEW,pH 6.0-6.5)is an ideal and environmentally-friendly disinfectant,which was used to prevent and control bacterial infections on *** work aims to investigate the inactivation effectiveness of SAEW in inactivating microbes in a disinfection *** bactericidal efficiency of SAEW on equipment surfaces was compared to two commercial disinfectants,Kuei A bromide solution(KAS,5:1000 v/v)and Glutaraldehyde solution(GS,5:1000 v/v).The disinfection effectiveness of SAEW in inactivating Salmonella enteritidis(***)on equipment surfaces in the disinfection channel was evaluated,and a model was developed using multiple linear regression *** indicated that SAEW was significantly(p0.05).In addition,available chlorine concentration(ACC)was an important factor than other factors,and the inactivation efficiency of Salmonella enteritidis sprayed by SAEW treatment was different between iron materials,kits and clothing surfaces(iron>kit>clothing).

关键词： slightly acidic electrolyzed water disinfection channel S.enteritidis disinfection bacterial infection prevention and control livestock farm

Migration of paleo-uplift in southwestern Tarim Basin and its implications for orogenesis and reservoir development, NW China

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Petroleum Exploration and Development 2023年第1期50卷 99-110页

作者： YAN Jiakai CHEN Hanlin CHENG Xiaogan CHEN Yongquan ZENG Changmin CHEN Cai wu hongxiang School of Earth Sciences Zhejiang UniversityHangzhou 310058China Research Center for Structures in Oil and Gas Bearing Basins Ministry of EducationHangzhou 310058China Exploration and Development Research Institute of Petro China Tarim Oilfield Company Korla 841000China

Based on well horizon calibration,the typical seismic profiles in southwestern Tarim Basin were interpreted systematically,regional geological sections were established,and the regional denudation thickness of each tectonic period was *** this basis,the plane morphology maps of ancient structures of the Cambrian pre-salt dolomites in different periods were compiled,and the spatial distribution,development,evolution and migration of paleo-uplift in the late Early Paleozoic were *** the late Early Paleozoic,there existed a unified regional paleo-uplift widely distributed in southwestern Tarim Basin,which is called the southwestern Tarim ***“Tarim SW paleo-uplift”and“Hetian paleo-uplift”proposed in previous literatures are not independent,but the result of the spatio-temporal migration and evolution of the southwestern Tarim paleo-uplift identified in this *** southwestern Tarim paleo-uplift emerged at the end of Middle Ordovician,and took its initial shape with increased amplitude in the Late *** the Silurian,the southwestern Tarim paleo-uplift rose steadily and expanded rapidly to the east,incorporating Pishan-Hetian and other areas,with the structural high locating in the Pishan-Hetian *** the Devonian,the southwestern Tarim paleo-uplift began to shrink gradually,to a limited range in the Pishan-Hetian area in the southern part of the *** the Carboniferous,the southwestern Tarim paleo-uplift became an underwater uplift,that is,the paleo-uplift gradually died *** southwestern Tarim paleo-uplift belongs to the forebulge of the southwestern Tarim foreland basin in the late Early Paleozoic,and its formation and evolution are related to the early Paleozoic orogeny of the West Kunlun orogenic belt in the south of the Tarim *** migration of the southwestern Tarim paleo-uplift from the northwestern part of the southwestern Tarim Basin to the Pishan-Hetian area indicates the early Paleozoic orogenic

关键词： paleo-uplift denudation planar morphology of ancient structure spatio-temporal migration Early Paleozoic orogeny southwestern Tarim Basin

家禽骨骼肌肌纤维类型影响因素及其转化的研究进展

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中国畜牧兽医 2024年第4期51卷 1561-1572页

作者：谢兵红单艳菊范晨宇薛夫光吴红翔巨晓军束婧婷刘一帆江苏省家禽科学研究所江苏省家禽遗传育种重点实验室扬州225125 江西农业大学动物科学技术学院动物健康安全生产南昌重点实验室南昌330000 江苏省家禽科学研究所科技创新有限公司扬州211412

肌纤维是构成肌肉组织的基本单位。肌肉的肌纤维类型组成与肉品质密切相关,并可在机体生长发育、营养和饲养环境等外界刺激下发生变化。近年来,由于消费者和育种学家对肉品质的关注,家禽肌纤维类型及其转换规律已成为本领域的研究热点... 详细信息

肌纤维是构成肌肉组织的基本单位。肌肉的肌纤维类型组成与肉品质密切相关,并可在机体生长发育、营养和饲养环境等外界刺激下发生变化。近年来,由于消费者和育种学家对肉品质的关注,家禽肌纤维类型及其转换规律已成为本领域的研究热点之一。随着组学研究技术的发展,转录组学、蛋白组学等技术已广泛应用于家禽肌纤维类型调控机理的研究,极大地推动了相关研究的进展。充分了解目前有关肌纤维类型转化的研究,是后续开展相关肉品质与调控机制研究的重要理论基础。在此背景下,作者介绍了肌纤维的结构组成及不同类型的分类方法,简述了肌纤维类型与家禽肌肉品质特征相关性状如肉色、pH、系水力和嫩度之间的关系,并总结了生长、品种、环境和饲养方式等因素对肌纤维类型的影响,重点讨论了现有的分子调控研究进展,旨在为家禽肌纤维类型转换机理的研究提供参考。最后,对未来优质肉鸡的育种方向提出了展望,希望随着现代分子生物技术的发展,单细胞/空间组学技术、基于CRISPR/Cas9系统的基因编辑技术等前沿技术能在肌纤维类型研究领域广泛运用,肌纤维类型转换的机制研究将不断完善,并建立家禽肉质性状的分子选育方法。

关键词：家禽肉品质肌纤维类型肌纤维类型转换