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Bias distribution and regulation in photoelectrochemical overall water-splitting cells

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National Science Review 2024年第4期11卷 141-150页

作者： Kun Dang Siqin Liu Lei Wu daojian Tang Jing Xue Jiaming Wang Hongwei Ji Chuncheng Chen Yuchao Zhang Jincai Zhao Key Laboratory of Photochemistry CAS ResearchEducation Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences

The water oxidation half-reaction at anodes is always considered the rate-limiting step of overall water splitting（OWS）,but the actual bias distribution between photoanodes and cathodes of photoelectro chemical（PEC） OWS cells has not been investigated *** this work,we find that,for PEC cells consisting of photoanodes（nickel-modified n-Si [Ni/n-Si] and α-Fe2O3） with low photovoltage(Vph1.V),a large portion of applied bias is exerted on the Pt cathode for satisfying the hydrogen evolution thermodynamics,showing a thermodynamics-controlled *** contrast,for photoanodes（TiO2and BiVO4） with Vph> 1.,the bias required for cathode activation can be significantly reduced,exhibiting a kinetics-controlled *** investigations show that the bias distribution can be regulated by tuning the electrolyte pH and using alternative half-reaction ***,a volcano plot is presented for the rational design of the overall reactions and unbiased PEC *** by this,an unbiased PEC cell consisting of a simple Ni/n-Si photoanode and Pt cathode is assembled,delivering a photo current density of 5.3±0.2 mA cm-2.

关键词： photoelectrochemistry overall reaction cell bias distribution photoanode water splitting

MoS_(2) nanoflowers and PEDOT:PSS nanocomposite enabling wearable dual-mode pressure sensors

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Science China(Technological Sciences) 2024年第6期67卷 1737-1747页

作者： WANG FengMing YANG WeiJia MA Ke SHEN GengZhe SU daojian LI BaiJun WANG ShuangPeng QIN BoLong ZHANG Chi XIN Yue CAO XiaoBing HE Xin School of Applied Physics and Materials Wuyi UniversityJiangmen529020China Biomaterials R&D Center Zhuhai Institute of Advanced TechnologyChinese Academy of SciencesZhuhai519003China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao999078China

A versatile sensing platform employing inorganic MoS_(2) nanoflowers and organic poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)has been investigated to develop the resistive and capacitive force-sensitive *** microstructure of the sensing layer heightens the sensitivity and response time of the dual-mode pressure sensors by augmenting electron pathways and inner stress in response to mechanical ***,the capacitive and resistive sensors exhibit sensitivities of 0.37 and 0.1. kPa^(-1.,respectively,while demonstrating a remarkable response time of approximately 1.0 ***,it is noteworthy that the PEDOT:PSS layer exhibits excellent adhesion to polydimethylsiloxane(PDMS)substrates,which contributes to the development of highly robust force-sensitive sensors capable of enduring more than 1.000loading/unloading *** combination of MoS_(2)/PEDOT:PSS layers in these dual-mode sensors has shown promising results in detecting human joint movements and subtle physiological ***,the sensors have achieved a remarkable precision rate of 98%in identifying target *** outcomes underscore the significant potential of these sensors for integration into applications such as electronic skin and human-machine interaction.

关键词： MoS_(2)/PEDOT:PSS nanocomposite force-sensitive sensor multi-scaled microstructure physiological signals monitoring object grasping recognition

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中小企业安全管理员工作异化形成机理研究

安全与环境学报 2024年第4期24卷 1477-1484页

作者：杨道建傅磊刘素霞江苏大学管理学院江苏镇江212013

为探明中小企业安全管理员工作异化的原因及形成机理,进而提出针对性防范措施,深度访谈中小企业的25名安全管理员,采用“情境过程”框架,遵循扎根理论程序,建构了中小企业安全管理员工作异化形成机理模型,并分析了相关因素对中小企业安... 详细信息

为探明中小企业安全管理员工作异化的原因及形成机理,进而提出针对性防范措施,深度访谈中小企业的25名安全管理员,采用“情境过程”框架,遵循扎根理论程序,建构了中小企业安全管理员工作异化形成机理模型,并分析了相关因素对中小企业安全管理员工作异化的影响。结果表明:当地应急管理部门、中小企业领导和员工在各自行为逻辑主导下,受内外部情境影响,分别选择形式化监管、模糊性问责,应付式管理、表面化支持,象征性参与和折扣性执行的行为策略。受这些行为策略的刺激,中小企业安全管理员产生自保、同情员工等心理,进而对应选择盲目追随、避责为先,一味顺从、不争权利,放宽要求、处罚宽松等行为策略,最终导致工作异化发生。

关键词：安全社会科学安全管理员工作异化情境过程扎根理论

Real-Time Safety Behavior Detection Technology of Indoors Power Personnel Based on Human Key Points

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Journal of Shanghai Jiaotong university(Science) 2024年第2期29卷 309-315页

作者：杨坚李聪敏洪道鉴卢东祁林秋佳方兴其喻谦张乾 State Grid Zhejiang Taizhou Power Supply Company Taizhou 318000ZhejiangChina Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China Zhejiang Huayun Information Technology Co. Ltd.Hangzhou 310012China

Safety production is of great significance to the development of enterprises and *** often cause great losses because of the particularity environment of electric ***,it is important to improve the safety supervision and protection in the electric power *** this paper,we simulate the actual electric power operation scenario by monitoring equipment and propose a real-time detection method of illegal actions based on human body key points to ensure safety behavior in real *** this method,the human body key points in video frames were first extracted by the high-resolution network,and then classified in real time by spatial-temporal graph convolutional *** results show that this method can effectively detect illegal actions in the simulated scene.

关键词： real-time behavior recognition human key points high-resolution network spatial-temporal graph convolutional network

高通量合成装置强化金属催化剂制备过程的研究进展

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化工进展 2024年第1期43卷 246-259页

作者：衡霖宇邓卓然程道建魏彬赵利强北京化工大学机电工程学院北京100029 北京化工大学有机无机复合材料国家重点实验室北京100029 北京化工大学化学工程学院北京100029 北京化工大学信息科学与技术学院北京100029

催化剂性能受制备过程多种因素影响,为优化催化剂制备配方与工艺条件,通常需要大量人工操作的实验试错过程,由此造成的低效率与低精度不可避免。在机械自动化控制水平不断发展的背景下,高通量合成装置的研发与投用将提升实验制备催化剂... 详细信息

催化剂性能受制备过程多种因素影响,为优化催化剂制备配方与工艺条件,通常需要大量人工操作的实验试错过程,由此造成的低效率与低精度不可避免。在机械自动化控制水平不断发展的背景下,高通量合成装置的研发与投用将提升实验制备催化剂过程的效率、精度与安全性。本综述从金属催化剂常用的合成方法(包括浸渍法、离子交换法、化学气相沉积法和沉淀沉积法)出发,阐述了薄膜沉积法、微流控技术、自动合成机器人、喷墨打印法等高通量合成装置如何协助强化催化材料制备过程和加速催化剂配方优化进程。本文将着重分析金属催化剂制备工艺的需求与高通量合成装置特征之间的一一对应关系。金属催化剂合成过程对高通量合成技术的需求日益增加,构建一种与合成工艺相适配、实用的金属催化剂高通量合成平台,可以为催化剂的研究带来巨大的推动力。

关键词：催化剂制备优化设计合成装置高通量

First-principles-aided thermodynamic modeling of transition-metal heterogeneous catalysts:A review

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Green Energy & Environment 2020年第3期5卷 286-302页

作者： Haoxiang Xu daojian Cheng State Key Laboratory of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing100029China

Over the past decade,the first-principles-aided thermodynamic models have become standard theoretical tools in research on structural stability and evolution of transition-metal heterogeneous catalysts under reaction *** in first-principles-aided thermodynamic models mean it is now possible to enable the operando computational modeling,which provides a deep insight into mechanism behind structural stability and evolution,and paves the way for high-through screening for promising transition-metal heterogeneous ***,we briefly review the framework and foundation of first-principles-aided thermodynamic models and highlight its contribution to stability analysis on catalysts and identification of reaction-induced structural evolution of catalyst under reaction *** present review is helpful for understanding the ongoing developments of first-principles-aided thermodynamic models,which can be employed to screen high-stability catalysts and predict their structural reconstruction in future rational catalyst design.

关键词： First-principles calculation Thermodynamic principle Transition metal catalyst Structural stability Structural evolution

Distributed Photovoltaic Real-Time Output Estimation Based on Graph Convolutional Networks

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Journal of Shanghai Jiaotong university(Science) 2024年第2期29卷 290-296页

作者：陈利跃洪道鉴何星卢东祁张乾谢妮娜徐一洲应煌浩 State Grid Zhejiang Electric Power Co. Ltd.Hangzhou 310007China State Grid Zhejiang Taizhou Power Supply Company Taizhou 318000ZhejiangChina Department of Automation School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The rapid growth of distributed photovoltaic(PV)has remarkable influence for the safe and economic operation of power *** view of the wide geographical distribution and a large number of distributed PV power stations,the current situation is that it is dificult to access the current dispatch data *** to the temporal and spatial characteristics of distributed PV,a graph convolution algorithm based on adaptive learning of adjacency matrix is proposed to estimate the real-time output of distributed PV in regional power *** actual case study shows that the adaptive graph convolution model gives different adjacency matrixes for different PV stations,which makes the corresponding output estimation algorithm have higher accuracy.

关键词： distributed photovoltaic(PV) graph convolution network power estimation

High-throughput synthesis of size-controlled Pt-based catalysts

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Particuology 2023年第12期83卷 232-240页

作者： Zhuoran Deng Liqiang Zhao daojian Cheng State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029China College of Information Science and Technology Beijing University of Chemical TechnologyBeijing100029China

Pt catalysts are commonly used for chemical reaction processes due to its high catalytic activity and ***,the size of metal particles often has a significant impact on the performance of the metal-loaded ***,developing highly efficiently synthesis method for the size control of Pt catalysts has great development prospects and research *** this study,high-throughput size tuning of Pt-based catalysts was achieved by carbonizing the *** experimental and characterization results showed that the size of the loaded Pt nanoparticles varied with different concentrations of glucose solution during carriers carbonization *** reduction of 4-nitrophenol as a template reaction indicated that the reaction rate constant of the catalyst is approximately linear with the size of Pt ***,a laboratory-built high-throughput synthesis system was applied for the catalyst synthesis,which enhances the automation of the laboratory exploratory experiments and makes it possible to synthesize catalysts with controllable size in batches.

关键词： High-throughput synthesis Size modulation Pt-based catalysts 4-Nitrophenol reduction

In celebration of the 80th birthday of Professor Wenchuan Wang

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Green Energy & Environment 2020年第3期5卷 247-248页

作者： Dapeng Cao Jianzhong Wu daojian Cheng Beijing University of Chemical Technology China jwu@engr.ucr.edu

It is our great pleasure to publish this special issue of "Molecular Thermodynamics for Green Engineering" in honor of Professor Wenchuan Wang on the occasion of his 80th birthday.

关键词： birthday honor pleasure