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Synthesis and application of transition metal phosphides as electrocatalyst for water splitting

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Science Bulletin 2017年第9期62卷 633-644页

作者： Jinzhan Su Jinglan Zhou Lu Wang Cong Liu yubin chen International Research Center for Renewable Energy (IRCRE) State Key Laboratory for Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China

With continuous research on photocatalytic water splitting, searching for efficient catalyst for hydrogen evolution reaction(HER) becomes popular topic in addition to main catalyst research. Transition metal phosphides are receiving intense attention due to its abundance in the Earth's crust and comparable catalytic properties to noble metals. In this review, the synthesis approaches, HER reaction mechanism,photocatalytic activity, approaches to improve the activity of transition metal phosphides were reviewed and discussed. It was showed that the transition metal phosphides have great potential to reduce the cost of photocatalyst and promising application on water splitting. The stability problem and participation of poisonous reactant and product in its synthesis reaction limit its application and developing in a certain extent, but with the continuous efforts on the development and improvement of the synthesis methods,transition metal phosphides will find wide application in water splitting.

关键词： Transition metal phosphide Electrocatalyst HER Photocatalytic water splitting

Expert recommendations on collection and annotation of otoscopy images for intelligent medicine

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Intelligent Medicine 2022年第4期2卷 230-234页

作者： Yuexin Cai Junbo Zeng Liping Lan Suijun chen Yongkang Ou Linqi Zeng Qintai Yang Peng Li yubin chen Qi Li Hongzheng Zhang Fan Shu Guoping chen Wenben chen Yahan Yang Ruiyang Li Anqi Yan Haotian Lin Yiqing Zheng Department of Otolaryngology Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhouGuangdong 510120China Shenshan Medical Center Sun Yat-sen Memorial HospitalSun Yat-sen UniversityShanweiGuangdong 516600Chin Zhongshan Ophthalmic Center Sun Yat-sen UniversityState Key Laboratory of OphthalmologyGuangzhouGuangdong 510623China Zhongshan School of Medicine Sun Yat-sen UniversityGuangzhouGuangdong 510080China Department of Otolaryngology Head and Neck Surgery The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510630China Department of Otolaryngology-Head and Neck Surgery Nanfang HospitalSouth Medical UniversityGuangzhouGuangdong 510515China Department of Otolaryngology-Head&Neck Surgery Zhujiang HospitalSouth Medical UniversityGuangzhouGuangdong 510280China Department of Otolaryngology Zhongshan City People’s HospitalZhongshan Affiliated Hospital of Sun Yat-sen UniversityZhongshanGuangdong 528403China

Middle and outer ear diseases are common otological diseases worldwide.Otoscopy and otoendoscopy exami-nations are essential first steps in the evaluation of patients with otological diseases.Misdiagnosis often occurs when the doctor lacks experience in interpreting the results of otoscopy or otoendoscopy,leading to delays in treatment or complications.Using deep learning to process otoscopy images and developing otoscopic artificial-intelligence-based decision-making systems will become a significant trend in the future.However,the uneven quality of otoscopy images is among the major obstacles to development of such artificial intelligence systems,and no standardized process for data acquisition,and annotation of otoscopy images in intelligent medicine has yet been fully established.The standards for data storage and data management are unified with those of other specialties and are introduced in detail here.This expert recommendation criterion improved and standardized the collection and annotation procedures for otoscopy images and fills the current gap in otologic intelligent medicine;it would thus lay a solid foundation for the standardized collection,storage,and annotation of oto-scopy images and the application of training algorithms,and promote the development of automatic diagnosis and treatment for otological diseases.The full text introduced image collection(including patient preparation,equipment standards,and image storage),image annotation standards,and quality control.

关键词： Otoscopy image Intelligent medicine Annotation Collection

Toward practical photoelectrochemical water splitting and CO_(2) reduction using earth-abundant materials

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Journal of Energy Chemistry 2021年第10期30卷 469-488,I0013页

作者： yubin chen Ya Liu Feng Wang Xiangjiu Guan Liejin Guo International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina

Photoelectrochemical(PEC)fuel generation from water splitting and CO_(2)reduction(CO_(2)R)utilizing solar energy holds immense potential to solve the current energy and environmental issues.In the past decades,numerous studies have been devoted to this fast-growing research field,and it is essential to develop efficient photoelectrodes with earth-abundant materials for the practical application of PEC systems.A thorough review of earth-abundant materials and associated devices for PEC fuel generation is beneficial to uncover the inherent obstacles and pave the way for future research.Herein,we summarize the recent progress of earth-abundant light-absorbers and cocatalysts in the PEC systems.The unbiased configurations and scaling-up strategies of PEC devices using earth-abundant materials are examined.A comparison between PEC water splitting and CO_(2)R is carried out to promote better understanding of the design principles for practical materials and devices.Last,the prospects on advanced materials,underlying mechanisms,and reaction systems of PEC water splitting and CO_(2)R are proposed.

关键词： Solar energy Photoelectrochemical technology Water splitting CO_(2)reduction Earth-abundant materials

Impacts of different methylprednisolone administration routes in patients with sudden hearing loss or Meniere’s disease

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Journal of Otology 2020年第4期15卷 149-154页

作者： Dan chen Zhipeng Li Qilin Zhou yubin chen Luoying Yang Jingqian Tan Xiangli Zeng Peng Li Department of Otolaryngology Third Affiliated Hospital of Sun Yat-Sen UniversityTianhe Road 600GuangzhouGuangdong510630PR China Department of Emergency Third Affiliated Hospital of Sun Yat-Sen UniversityTianhe Road 600GuangzhouGuangdong510630PR China

Background:Evidence suggests that glucocorticoids are important in the treatment of sudden hearing loss(SHL)and Meniere’s disease(MD).However,different glucocorticoid administration methods may have a significant impact on treatment outcomes.Objective:This study aimed to investigate effects of different glucocorticoid administration methods on sudden hearing loss and Meniere’s disease.Methods:In this study,glucocorticoids were administered orally in 18 patients,by retroauricular injection in 15 patients and by intratympanic injection in 15 patients.White blood cell(WBC)count,serum Kt,fasting plasma glucose(FPG),body temperature,heart rate and blood pressure were used to evaluate effects of glucocorticoids on patients with hearing loss.Visual analog scale(VAS)of pain and sleep disorders were also surveyed,and pure tone audiometry(PTA)results were compared among groups to evaluate efficacy of different glucocorticoids administration methods.Result:WBC count,heart rate and blood pressure were higher in patients taking oral glucocorticoids,while body temperature,serum Kt and FPG levels did not change in all three groups.However,patients who received intratympanic injection of glucocorticoids experienced more pain,while those taking oral glucocorticoids reported more sleep impairment.Treatment efficacy on hearing loss was not significantly different among the three groups.Conclusion:These findings suggest that systemic glucocorticoid administration can result in greater whole body responses than local administration,but with similar hearing treatment efficacy.

关键词： Sudden hearing loss Meniere’s disease Glucocorticoids Administration method Overall response

基于遗传算法的吸波材料P波段电磁参数的计算与优化

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航空材料学报 2024年第3期44卷 102-110页

作者：周梦雨陈宇滨和玉光杨程中国航发北京航空材料研究院北京100095 北京石墨烯技术研究院有限公司北京100094

针对吸波材料P波段电磁参数准确测试存在困难的问题,本研究基于吸波材料反射率计算理论模型中电磁参数与反射率的关系,利用遗传算法不断调整磁性材料的电磁参数,直到磁性材料反射率的计算值与测试值相吻合。探究遗传算法中种群数量、变... 详细信息

针对吸波材料P波段电磁参数准确测试存在困难的问题,本研究基于吸波材料反射率计算理论模型中电磁参数与反射率的关系,利用遗传算法不断调整磁性材料的电磁参数,直到磁性材料反射率的计算值与测试值相吻合。探究遗传算法中种群数量、变异概率以及迭代次数对电磁参数求解的影响。结果表明,设定未知解的上下限为(0,100),种群数量为1000~2000,迭代次数为100,变异概率为0.1,可以兼顾求解速度和准确性。将4种不同厚度磁性材料的反射率的测试值与计算值的差值求和,进行指数化处理,作为目标函数,并参考前后频点的电磁性能,得到误差最小且相对稳定的一组解即为磁性材料的电磁参数。最后制作磁性材料石墨烯平板样件进行实验验证,结果表明:反射率计算值与测试值的误差由初始的58.8%降为7.5%。计算值与测试值相吻合,验证了该电磁参数计算优化方法的可行性和有效性。

关键词：吸波材料电磁参数反射率遗传算法

数字普惠金融对农业规模经营的影响效应——基于空间面板模型与门槛模型的实证分析

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当代经济管理 2024年第3期46卷 87-96页

作者：陈宇斌王森陆杉广东海洋大学经济学院广东湛江524000 暨南大学国际商学院广东珠海519000 湖南工商大学资源环境学院湖南长沙413000

从农村地区信贷约束与农业规模经营互为矛盾的现实困境出发,文章进一步着眼于数字普惠金融视角,基于2011—2019年省际面板数据,并运用普通面板模型、空间面板模型和面板门槛模型考察了数字普惠金融对农业规模经营的影响及其空间溢出效... 详细信息

从农村地区信贷约束与农业规模经营互为矛盾的现实困境出发,文章进一步着眼于数字普惠金融视角,基于2011—2019年省际面板数据,并运用普通面板模型、空间面板模型和面板门槛模型考察了数字普惠金融对农业规模经营的影响及其空间溢出效应与门槛特征。研究发现:数字普惠金融通过缓解农村地区信贷约束而对农业规模经营的总量和效率两个层面具有显著的推动作用;数字普惠金融对本地区和邻近地区的农业规模经营的总量和效率层面均具有促进作用,说明这种促进作用存在空间关联效应;数字普惠金融之覆盖广度、使用深度对农业规模经营总量和效率的促进作用表现出显著的空间溢出效应,而数字化程度对农业规模经营的影响较为有限;随着农村教育水平提高,数字普惠金融对农业规模经营总量和效率的推动作用表现出边际递增特征。文章的政策建议是强化农村地区数字普惠金融服务、构建区域之间交流协作机制,以及加大农村地区的教育投入,以推动农业适度规模经营进程。

关键词：农业规模经营数字普惠金融农村教育水平空间关联效应门槛效应

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Synergy of porous structure and cation doping in Ta3N5 photoanode towards improved photoelectrochemical water oxidation

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Journal of Energy Chemistry 2021年第1期30卷 343-350,I0011页

作者： yubin chen Hongyu Xia Xiaoyang Feng Ya Liu Wenyu Zheng Lijing Ma Rui Li International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina

Herein,a cross-linked porous Ta3N5 film was prepared via a simple solution combustion route followed by a high-temperature nitridation process for photoelectrochemical(PEC) water oxidation.Meanwhile,the metal cations(Mg2+ and Zr4+) were incorporated into the porous Ta3N5 to enhance the PEC performance.The porous Mg/Zr co-doped Ta3N5 photoanode yielded a photocurrent density of 1.40 mA cm^(-2) at 1.23 V vs RHE,which is 5.6 times higher than that of the dense Ta3N5 photoanode.The enhanced performance should be ascribed to the synergistic effect of porous structure and cation doping,which can enlarge the electrochemical active surface area and accelerate the charge transfer by introducing ON substitution defects.Subsequently,Co(OH)2 cocatalyst was loaded on the Mg/Zr-Ta3N5 photoanode to negatively shift the onset potential to 0.45 V vs RHE and further improve the photocurrent density to 3.5 mA cm^(-2)at 1.23 V vs.RHE,with a maximum half-cell solar to hydrogen efficiency of 0.45%.The present study provides a new strategy to design efficient Ta3N5 photoelectrodes via the simultaneous control of the morphology and composition.

关键词： Photoelectrochemical water oxidation Ta3N5 Porous structure Doping Solution combustion

Yolk-shell structured Co-C/Void/Co9S8 composites with a tunable cavity for ultrabroadband and efficient low- frequency microwave absorption

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Nano Research 2018年第8期11卷 4169-4182页

作者： Xiaofang Liu chengcheng Hao Lihua He cheng Yang yubin chen chengbao Jiang Ronghai Yu School of Materials Science and Engineering Beihang University Beijing 100191 China Beijing Institute of Aeronautical Materials Beijing 100095 China

A yolk-shell structured Co-C/Void/CogS8 ternary composite composed of a Co nanoparticle-embedded porous carbon core and Co9S8 shell was synthesized by the sulfidation of a Co-based zeolitic imidazolate framework and subsequent pyrolysis. The composition and interior cavity of the Co-C/Void/CogS8 composite could be precisely modulated by controlling the sulfidation reaction. Due to the abundant heterointerfaces, well-controlled cavity, and magnetic-dielectric synergistic effects, the Co-C/Void/CogS8 exhibited excellent and tunable microwave- absorbing properties. The optimized Co-C/Void/Cog~ having a loading of 25 wt.% and thickness only 2.2 mm, displayed an ultrabroad absorption bandwidth of 8.2 GHz at high frequencies. Moreover, the composite could achieve an extremely high reflection loss of -54.02 dB at low frequencies by adjusting its loading to 30 wt.%. This study provides a new insight into promising lightweight microwave-absorbing materials with ultrabroad absorption bandwidths and strong low-frequency absorption.

关键词： yolk-shell structure metal organic framework sulfide microwave absorption broad bandwidth

高标准基本农田建设政策对农产品贸易逆差的影响——基于粮食安全和绿色发展的双重视角

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兰州学刊 2024年第3期 148-160页

作者：陈宇斌王森陆杉广东海洋大学经济学院暨南大学国际商学院湖南工商大学资源环境学院

文章立足于粮食安全与绿色发展视角,基于2005—2017年省级面板数据,运用广义双重差分法等实证考察高标准农田建设政策实施对农产品贸易逆差格局的影响及其作用机制。研究发现,高标准农田政策实施对农产品贸易逆差存在显著的“纾解效应”... 详细信息

文章立足于粮食安全与绿色发展视角,基于2005—2017年省级面板数据,运用广义双重差分法等实证考察高标准农田建设政策实施对农产品贸易逆差格局的影响及其作用机制。研究发现,高标准农田政策实施对农产品贸易逆差存在显著的“纾解效应”,并且该项结论在平行趋势检验等一系列稳健性检验下仍然成立;异质性分析表明,相较于西部地区,政策效应在中东部地区更为明显;作用机制分析发现,政策实施不仅可以通过巩固粮食安全而减少对农产品进口的过度依赖来改善农产品贸易逆差,而且可以通过加速农业绿色发展进程、规避绿色贸易壁垒而增加农产品出口来改善农产品贸易逆差。文章的政策建议是加强高标准农田建设投入、灵活调整政策实施的区域布局结构和强化粮食安全与绿色发展的路径依赖,继而改善农产品贸易逆差格局。

关键词：农产品贸易逆差高标准农田建设粮食安全绿色发展