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In-situ ECSTM investigation of H_(2)O_(2)production in cobalt–porphyrin-catalyzed oxygen reduction reaction

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Science China Chemistry 2023年第1期66卷 273-278页

作者： Ya-Chen Feng Xiang Wang Zhen-Yu Yi Yu-Qi Wang hui-juan yan Dong Wang CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Science(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Bejing 100049China

We report the in-situ investigation of the production of H_(2)O_(2)in 5,10,15,20-tetra(4-methoxyphenyl)-21H,23H-porphyrin cobalt(Ⅱ)(Co TMPP)-catalyzed oxygen reduction reaction(ORR)in neutral electrolytes by electrochemical scanning tunneling microscopy(ECSTM)at the molecular *** adsorption of OOH-on active sites can be observed in STM images and is found to be correlated with the pH value of the *** thermodynamic parameters of the formation of Co TMPP–OOHcomplex are extracted by the quantitative analysis of the STM *** stages of the ORR including the formation of H_(2)O_(2)and further reduction of H_(2)O_(2)at different reduction potentials can be revealed by electrochemical ***-situ ECSTM experiments unambiguously identify the formation of the Co TMPP–OOH-complex as the high contrast species and its reduction and oxidation *** work provides the direct evidence for understanding the formation and transformation process of H_(2)O_(2)at the molecular scale,which benefits the rational design of the high-efficiency electrocatalysts for ORR and H_(2)O_(2)production.

关键词： electrochemical scanning tunnelling microscopy H_(2)O_(2)production cobalt-porphyrin oxygen reduction reaction

Investigation of weak interlayer coupling in 2D layered GeS_(2) from theory to experiment

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Nano Research 2022年第2期15卷 1013-1019页

作者： hui-juan yan Zongbao Li Shun-Chang Liu Xia Wang Xing Zhang Ding-Jiang Xue Jin-Song Hu Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Key Laboratory of Molecular Nanostructure and NanotechnologyInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Material and Chemical Engineering Institute of Cultural and Technological Industry Innovation ofTongrenTongren UniversityTongren 554300China University of Chinese Academy of Sciences Beijing 100049China

Interlayer coupling as a unique feature for two-dimensional(2D)materials may influence their thickness-dependent physical properties,especially the bandgap due to quantum confinement ***-studied 2D materials usually possess strong interlayer coupling such as most of transition metal dichalcogenides(TMDs),PtS_(2) and so ***,2D materials with weak interlayer coupling are rarely referred that mainly focus on ReS_(2),as well as its counterpart ReSe_(2).Here we report a new member of weak interlayer coupling 2D materials,germanium disulfide(GeS_(2)).The interlayer interaction in GeS_(2) is investigated from theory to *** density functional theory calculations,we find that this extraordinarily weak interlayer coupling in GeS_(2) originates from the weak hybridization of interlayer S ***-dependent Raman spectra of GeS_(2) flakes exhibit that the Raman peaks remain unchanged when increasing the thickness;and a small first-order temperature coefficient of-0.00857 cm^(-1)·K^(-1) is obtained from the temperature-dependent Raman *** experimental results further confirm the weak interlayer coupling in GeS_(2).

关键词： interlayer coupling two-dimensional GeS_(2) temperature coefficient

Melt-and air-processed selenium thin-film solar cells

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Science China Chemistry 2022年第11期65卷 2197-2204页

作者： Wenbo Lu Zongbao Li Mingjie Feng hui-juan yan Bin yan Liyan Hu Xing Zhang Shunchang Liu Jin-Song Hu Ding-Jiang Xue Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Key Laboratory of Molecular Nanostructure and NanotechnologyInstitute of ChemistryChinese Academy of SciencesBeijing100190China School of Material and Chemical Engineering Tongren UniversityTongren 554300China National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou 450002China University of Chinese Academy of Sciences Beijing 100049China

Elemental selenium(Se), as the world’s first but long-neglected photovoltaic material, has regained great interest recently in tandem solar cells as top cells due to its wide bandgap(~1.8 eV), simple, non-toxic and earth-abundant composition, and intrinsic environmental stability. In particular, Se possesses the lowest melting point of 217 °C among the photovoltaic absorbers reported so far, endowing Se with a unique advantage of film fabrication by blade coating the Se melt on substrate. However, the poor wettability of Se melt on widely-used photovoltaic functional layers such as TiO_(2) limits its melt processing. Here we introduce a wettability-modification strategy that decreases the contact angle of Se melt on substrate and improves the wettability by appropriately enhancing the heating temperature of molten Se while avoiding Se volatilization. We further reveal the mechanism of the inherent air stability of Se that originates from the high activation energy of oxygen chemisorption on Se(3.21 eV). This enables the realization of compact Se films through melt-based blade coating in ambient air. The resulting Se solar cells exhibit an efficiency of 3.5%. Unencapsulated devices show no efficiency loss after 1,000 h of storage under ambient conditions.

关键词： selenium thin film photovoltaic melt processing

Molecular Insights into the Structure-Activity Relationship in Cobalt Porphyrin Catalyzed Oxygen Reduction Reaction

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CCS Chemistry 2023年第11期5卷 2628-2637页

作者： Xiang Wang Ya-Chen Feng Yu-Qi Wang Zhen-Yu Yi Jun-Jie Duan hui-juan yan Dong Wang Li-Jun Wan CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Science(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049

We present a microscopic investigation on the structure-activity relationship of the Co-N4 site in the oxygen reduction reaction(ORR)by electrochemical scanning tunneling microscopy(ECSTM)at the molecular *** cobalt porphyrins with various substituents(CoTPPX_(4),X=Cl,H,OCH_(3))that delicately regulate the electronic structure of the active site were investigatedasmodel *** measurements evidenced that the CoTPPCl_(4)exhibits better activity,higher product selectivity for H_(2)O,and lower *** CoTPPX_(4)-O_(2)complex with higher contrast can be observed in the STM images and the proportion of the CoTPPCl_(4)-O_(2)is appreciably larger than that of CoTPP-O_(2)and CoTPP(OCH_(3))4-O_(2).Theoretical simulations of the model catalysts and the reaction processes of the ORR reveal the relationship between the electronic structure and the catalytic behavior of the model *** transformation of the CoTPPX_(4)-O_(2)and CoTPPX_(4)in the electrocatalytic reaction was monitored by in situ ECSTM *** structure-activity relationship clarified by experimental and theoretical investigations in this work should help to guide the rational design and optimization of high-performance catalysts.

关键词： cobalt porphyrin oxygen reduction reaction electrochemical scanning tunneling microscope structure-activity relationship model catalyst

Development and prospect of near-infrared spectroscopy-assisted schizophrenia diagnosis based on bibliometrics

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World Journal of Psychiatry 2025年第1期15卷 7-11页

作者： yan Zhang Hao-Yu Xing juan yan Administration Office Lishui Second People’s HospitalLishui 323060Zhejiang ProvinceChina Department of Medical Engineering The Affiliated Mental Health Center&Hangzhou Seventh People's HospitalZhejiang University School of MedicineHangzhou 310013Zhejiang ProvinceChina Quality Control Office The Affiliated Mental Health Center&Hangzhou Seventh People's HospitalZhejiang University School of MedicineHangzhou 310013Zhejiang ProvinceChina

In this editorial,we comment on the recent article by Fei et al exploring the field of near-infrared spectroscopy(NIRS)research in schizophrenia from a bibliometrics *** recent years,NIRS has shown unique advantages in the auxiliary diagnosis of schizophrenia,and the introduction of bibliometrics has provided a macro perspective for research in this *** the opportunities brought about by these technological developments,remaining challenges require multidi-sciplinary approach to devise a reliable and accurate diagnosis system for ***,NIRS-assisted technology is expected to contribute to the division of methods for early intervention and treatment of schizophrenia.

关键词： Bibliometrics Schizophrenia Near-infrared spectroscopy Diagnostic technique Data analysis

Mediating role of health literacy in the relationship between social isolation and psychological distress among pre-frail older adults

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World Journal of Psychiatry 2025年第1期15卷 137-144页

作者： juan Fang Li-hui Li Ming-Qian He Yue Ji Dong-yan Lu Li-Bing Zhang Jin-Lan Yao School of Medicine Huzhou UniversityHuzhou 313000Zhejiang ProvinceChina

BACKGROUND Frailty has become a significant public health *** recent increase in the number of frail older adults has led to increased attention being paid to psycho-logical care services in *** social isolation of pre-frail older adults can impact their psychological *** To explore the mediating effect of health literacy between social isolation and psychological distress among communitydwelling older adults with *** This descriptive cross-sectional study was conducted with 254 pre-frail older individuals aged 60 years and *** isolation,health literacy,and psycholo-gical distress were comprehensively measured using the Lubben Social Network Scale-6,12-item Short-Form Health Literacy Questionnaire,and the Kessler Psy-chological Distress *** were evaluated using the SPSS 27.0 package program and the PROCESS macro *** statistical analyses,correlation analyses,and bootstrap mediation tests were used to assess associations between the *** The results showed that social isolation had an effect on health literacy among pre-frail older adults(β=0.240,P<0.001),social isolation impact on psycho-logical distress pre-frail older adults(β=-0.415,P<0.001);health literacy was identified effect on psychological distress among pre-frail older persons(β=-0.307,P<0.001).Health literacy partially mediated the relationship between social isolation and psychological distress among community-dwelling older adults with pre-frailty,with a mediation effect of-0.074,accounting for 17.83%of the total effect.

关键词： Frail Ageing Psychological distress Health literacy Social isolation

Clinical value of combining epirubicin with mindfulness intervention in patients with urinary system tumors and depression

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World Journal of Psychiatry 2025年第1期15卷 54-62页

作者： juan Liu yan-Ping Guo yan-Mei Lu Bei-Lin Wang Department of Urology Surgery Zhumadian Central HospitalZhumadian 463000Henan ProvinceChina Department of Psychiatry Zhumadian Mental HospitalZhumadian 463000Henan ProvinceChina

BACKGROUND Urinary system tumors often cause negative psychological symptoms,such as depression and dysphoria which significantly impact immune function and indirectly affect cancer *** epirubicin(EPI)is recommended by the European Association of Urology and can improve prognosis,its long-term use can cause toxic side effects,reduce treatment compliance,and increase psycho-logical ***,an appropriate intervention mode is *** This was a retrospective study including 110 patients with urinary system tumors and depression admitted to Zhumadian Central Hospital between March 2021 and July *** were divided into conventional(n=55)and joint inter-vention(n=55)*** conventional group received mitomycin and routine nursing,while the joint intervention group received EPI and mindfulness *** groups underwent three cycles of *** function(CD4+cells,CD8+cells,CD4+/CD8+ratio),tumor marker levels[urinary bladder cancer antigen(UBC),bladder tumor antigen(BTA)and nuclear matrix protein 22(NMP22)],quality of life questionnaire-core 30(QLQ-C30),17-item Hamilton depression scale(HAMD-17),and cancer-related fatigue[cancer fatigue scale(CFS)]were *** reactions and nursing satisfaction were recorded and *** Post-intervention,CD4+,CD8+,and CD4+/CD8+levels increased in both groups,with the joint intervention group showing more significant improvement(P<0.05).Tumor marker levels(NMP22,BTA,and UBC)were lower in the joint intervention group compared to the conventional group(P<0.05).The joint intervention group also showed a greater reduction in HAMD-17 scores(9.38±3.12 vs 15.45±4.86,P<0.05),higher QLQ-C30 scores,and lower CFS scores(both P<0.05).Additionally,the joint intervention group had a lower incidence of adverse reactions and higher nursing satisfaction(P<0.05).CONCLUSION EPI combined with mindfulness intervention significantly improved clinical outcomes in patients with urinar

关键词： Urinary system tumor Bladder cancer Prostate cancer Depression Epirubicin

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基于多传感器信号分析的故障诊断

组合机床与自动化加工技术 2016年第9期 99-102页

作者：陈轶杨奕包辉慧陆艳娟张烨南通大学电气工程学院江苏南通226019

为解决复杂环境中难以诊断的机械故障,以振动信号和温度、压力等测量信号为基础,建立一种基于多种传感器信号分析的故障诊断模型。针对振动信号,采用小波包对原始振动信号进行分解,提取特征值组成原始特征向量,然后采用粗糙集方法对原... 详细信息

为解决复杂环境中难以诊断的机械故障,以振动信号和温度、压力等测量信号为基础,建立一种基于多种传感器信号分析的故障诊断模型。针对振动信号,采用小波包对原始振动信号进行分解,提取特征值组成原始特征向量,然后采用粗糙集方法对原始特征向量进行特征约简,将约简后的分类规则作为对向神经网络的训练集。针对温度、压力等测量信号,将各个传感器测量的数据融合形成特征向量,利用遗传算法优化的BP神经网络对其进行训练和模式识别。最后对这两类信号的诊断结果进行融合,构成了一种复合故障诊断模型。实验证明,该诊断模型有较高诊断精度和准确度。

关键词：小波包粗糙集神经网络信息融合故障诊断

EXPERIMENT STUDY OF REDUCING NOx EMISSION IN CORNER-FIRED BOILER WITH AIR-STAGED COMBUSTION

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EXPERIMENT STUDY OF REDUCING NOx EMISSION IN CORNER-FIRED BO...