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Developing silicon-based photocathodes for CO_(2) conversion

Science China Chemistry 2024年第6期67卷 1904-1921页

作者： Weijie Zhuang miao kan Tao Meng Jinlong Zhang Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China Shanghai Engineering Research Center for Multimedia Environmental Catalysis and Resource Utilization East China University of Science and TechnologyShanghai200237China

Photoelectrochemical(PEC)conversion of CO_(2) presents a promising avenue for solar-driven chemical fuel production,with silicon emerging as a cost-effective and high-light-absorbing material pivotal to this *** at exploring opportunities for industrializing PEC CO_(2) reduction(PEC-CO_(2)R)by minimizing reaction energy consumption,enhancing reaction efficiency and selectivity,this review summarizes recent advancements in developing Si-based photocathodes for PEC-CO_(2)*** outlines the fundamental principles,advantages,and limitations of Si photocathodes with key performance *** on this understanding,the strategies to enhance the performance of the PEC-CO_(2)R system,including light absorption,charge separation,and catalytic reactions are categorized as the interfacial modification,active site decoration,and protective layer *** design ideas of this advantageous three-layer structure in promoting the efficiency,stability,and selectivity have been ***,this review scrutinizes the influence of the photocathodic chemical *** review consolidates the mechanism insights and notable breakthroughs of various fuel generation processes within Si-based PEC-CO_(2)R *** this wealth of information offers an up-to-date perspective on the dynamic developments in silicon-based PEC-CO_(2) conversion and underscores the promising pathways toward the sustainable fuel synthesis from pollutant CO_(2).

关键词： photoelectrochemistry solar fuels silicon photocathodes carbon dioxide reduction microenvironment

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Photoelectrochemical seawater oxidation with metal oxide materials:Challenges and opportunities

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Journal of Energy Chemistry 2024年第10期97卷 767-782,I0016页

作者： miao kan Hangyu Hu Weijie Zhuang Meng Tao Shiqun Wu Jinlong Zhang Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Engineering Research Center for Multimedia Environmental Catalysis and Resource Utilization East China University of Science and TechnologyShanghai 200237 China

Photocatalytic water oxidation is a crucial counter-electrode reaction in the process of photoelectrochemical energy *** its importance,challenges remain in effectively and sustainably converting water to oxygen,particularly with readily available and inexpensive electrolyte solutions such as *** metal oxide materials have demonstrated their advantages in promoting efficiency by reducing overpotential and improving light utilization,stability remains limited by corrosion in multicomponent *** this paper,we reviewed the relationship between four basic concepts including photoelectrochemistry,metal oxide,water oxidation and seawater to better understand the challenges and opportunities in photoelectrochemical(PEC)seawater *** overcome these challenges,the advances in material design,interfacial modification,local environment control and reactor design have been further reviewed to benefit the industrial PEC seawater ***,we demonstrate engineered layered metal oxide electrodes and cell structures that enable powerful and stable seawater *** also outline and advise on the future direction in this area.

关键词： Photoelectrochemistry Anode Water oxidation Metal oxide Seawater Stability

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MA Cation-Induced Diffusional Growth of Low-Bandgap FA-Cs Perovskites Driven by Natural Gradient Annealing

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Research 2021年第1期2021卷 748-758页

作者： Taiyang Zhang Yuetian Chen miao kan Shumao Xu Yanfeng miao Xingtao Wang Meng Ren Haoran Chen Xiaomin Liu Yixin Zhao School of Environmental Science and Engineering Shanghai Jiao Tong University800 Dongchuan Rd.Shanghai 200240China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200240China

Low-bandgap formamidinium-cesium(FA-Cs)perovskites of FA_(1-x)CsxPbI_(3)(x<0:1)are promising candidates for efficient and robust perovskite solar cells,but their black-phase crystallization is very sensitive to annealing ***,the low heat conductivity of the glass substrate builds up a temperature gradient within from bottom to top and makes the initial annealing temperature of the perovskite film lower than the black-phase crystallization point(~150℃).Herein,we take advantage of such temperature gradient for the diffusional growth of high-quality FA-Cs perovskites by introducing a thermally unstable MA^(+)cation,which would firstly formα-phase FA-MA-Cs mixed perovskites with low formation energy at the hot bottom of the perovskite films in the early annealing *** natural gradient annealing temperature and the thermally unstable MA^(+)cation then lead to the bottom-to-top diffusional growth of highly orientatedα-phase FA-Cs perovskite,which exhibits 10-fold of enhanced crystallinity and reduced trap density(~3:85×10^(15) cm^(−3)).Eventually,such FA-Cs perovskite films were fabricated into stable solar cell devices with champion efficiency up to 23.11%,among the highest efficiency of MA-free perovskite solar cells.

关键词： temperature annealing perovskite

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Photodeposited FeOOH vs electrodeposited Co-Pi to enhance nanoporous BiVO4 for photoelectrochemical water splitting

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Journal of Semiconductors 2017年第5期38卷 24-29页

作者： Aihua Jia miao kan Jinping Jia Yixin Zhao School of Environmental Science and Engineering Shanghai Jiao Tong University

Co-Pi and FeOOH cocatalysts were in-situ deposited on the surface of nanoporous BiVO4 *** FeOOH cocatalyst has little effect on the BiVO4 samples＇ morphologies,while the electrodeposited CoPi cocatalyst seems to affect the surface of BiVO4 The impedance intensity modulated photocurrent spectroscopy（IMPS）,Mott-Schottky（M-S） techniques characterize BiVO4 samples photoelectrochemical performance with the deposition of Co-Pi and *** Co-Pi/BiVO4 shows better photoelectrochemical performance than the FeOOH/BiVO4,but the FeOOH/BiVO4 exhibited the better *** flat band potential and slope of M-S plotof FeOOH/BiVO4 have little variations compared with *** contrast,Co-Pi/BiVO4 exhibited the down shifted flat band potential,which is beneficial for the photoelectrochemical water *** electron transfer measurements revealed that the deposition of FeOOH and Co-Pi onto BiVO4 significantly enhanced the photoelectrochemical performance via reducing the interface resistance and promoting the electron ***,Co-Pi cocatalysts can further pin the transport-limiting traps and significantly facilitate the electron transport.

关键词： BiVO4 FeOOH Co-Pi water splitting

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Oxidation and detection of L-cysteine using a modified Au/Nafion/glass carbon electrode

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Science China Chemistry 2011年第3期54卷 521-525页

作者： WANG XueJi ZHANG LiLi miao LiXiao kan MeiXiu KONG LinLin ZHANG HuiMin School of Science Beijing Institute of Technology Beijing 100081 China

In this work,the electrochemical oxidation of L-cysteine(CySH)was investigated on a composite film modified electrode with Au nanoparticles dispersed in the fluorocarbon polymer(Nafion).The excellent electrocatalytic effect on CySH oxidation was attributed to the role of Au *** voltammetric studies revealed two anodic peaks for the oxidation of CySH in the pH range of 2.0–*** electrode was used to detect cysteine at pH 2.0 and pH *** pH 2.0,a determination range of 3.0–50.0?mol/L was obtained with the detection sensitivity of 22.7A/(mmol L1),while at pH 7.0,a determination range of 2.0–80.0mol/L was obtained with the detection sensitivity of 4.08A/(mmol L1).The detection limits were estimated to be as low as 1.0?mol/L at both pH 7.0 and pH ***,at pH 7.0,the interferences of ascorbic acid and uric acid were reduced for the detection of *** made the Au/Nafion/GC electrode a promising candidate for efficient electrochemical sensors for the detection of CySH.

关键词： L-cysteine composite film gold nanoparticles Nafion detection

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Solution chemistry quasi-epitaxial growth of atomic CaTiO_(3)perovskite layers to stabilize and passivate TiO_(2)photoelectrodes for efficient water splitting

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Fundamental Research 2023年第6期3卷 918-925页

作者： Ning Wei Yuetian Chen Xingtao Wang miao kan Taiyang Zhang Yixin Zhao Frontiers Science Center for Transformative Molecules School of Environmental Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200240China

Perovskite oxides with unique crystal structures and high defect tolerance are promising as atomic surface passivation layers for photoelectrodes for efficient and stable water ***,controllably depositing and crystalizing perovskite-type metal oxides at the atomic level remains challenging,as they usually crystalize at higher temperatures than regular metal ***,we report a mild solution chemistry approach for the quasi-epitaxial growth of an atomic CaTiO_(3)perovskite layer on rutile TiO_(2)nanorod *** high-temperature crystallization of CaTiO_(3)perovskite is overcome by a sequential hydrothermal conversion of the atomic amorphous TiOx layer to CaTiO_(3)*** atomic quasi-epitaxial CaTiO_(3)layer passivated TiO_(2)nanorod arrays exhibit more efficient interface charge transfer and high photoelectrochemical performance for water *** a mild solution-based approach for the quasi-epitaxial growth of atomic metal oxide perovskite layers could be a promising strategy for both fabricating atomic perovskite layers and improving their photoelectrochemical properties.

关键词： Solution atomic layer deposition CaTiO_(3)/TiO_(2) Quasi-epitaxial growth In-situ surface passivation Photoelectrochemical water splitting

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分析中国未来农业发展的各影响因素的权重

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科技和产业 2014年第6期14卷 19-21,43页

作者：阚苗苗安徽财经大学统计与应用数学学院安徽蚌埠233030

为研究制约中国未来农业发展的各因素问题,依据我国未来农业的发展总体目标,按层次分解问题,构成一个由下而上递阶层次的结构,建立了层次分析模型,得出各因素所占权重大小,进而得到仍有2亿人口的粮食不能自给对我国未来农业发展影响最大... 详细信息

为研究制约中国未来农业发展的各因素问题,依据我国未来农业的发展总体目标,按层次分解问题,构成一个由下而上递阶层次的结构,建立了层次分析模型,得出各因素所占权重大小,进而得到仍有2亿人口的粮食不能自给对我国未来农业发展影响最大,其次是缺水,地少,再次是农村贫困人口生活问题、农转非,城市化建设在这四个之中影响最小的结论,解决或改善农村农业的这些问题,进而加快我国农业的发展。

关键词：中国农业发展方向层次分析法 Matlab

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Electroreduction of air‐level CO_(2) with high conversion efficiency

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Chinese Journal of Catalysis 2022年第7期43卷 1703-1709页

作者： Yangshen Chen miao kan Shuai Yan Junbo Zhang Kunhao Liu Yaqin Yan Anxiang Guan Ximeng Lv Linping Qian Gengfeng Zheng Laboratory of Advanced Materials Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFaculty of Chemistry and Materials ScienceFudan UniversityShanghai 200438China

The electrochemical conversion of carbon dioxide(CO_(2))has been attracting increasingly research interest in the past decade,with the ultimate goal of utilizing electricity from renewable energy to realize carbon neutrality,as well as economic and energy ***,the capture and concentrating of CO_(2) cost a substantial portion of energy,while almost all the reported researches showed CO_(2) electroreduction under high concentrations of(typically pure)CO_(2) reactants,and only very few recent studies have investigated the capability of applying low CO_(2) concentrations(such as~10%in flue gases).In this work,we first demonstrated the electroreduction of 0.03%CO_(2)(in helium)in a homemade gas‐phase electrochemical electrolyzer,using a low‐cost copper(Cu)or nanoscale copper(nano‐Cu)*** with steam,the gas‐phase CO_(2) was directly delivered onto the gas‐solid interface with the Cu catalyst and reduced to CO,without the need/constraint of being adsorbed by aqueous solution or alkaline *** tuning the catalyst and experi‐mental parameters,the conversion efficiency of CO_(2) reached as high as~95%.Furthermore,we demonstrated the direct electroreduction of 0.04%CO_(2) from real air sample with an optimized conversion efficiency of~79%,suggesting a promising perspective of the electroreduction ap‐proach toward direct CO_(2) conversion.

关键词： CO_(2)conversion Electrocatalysis Low concentration CO_(2) Flow rate Conversion efficiency

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不同储藏方式对大米品质的影响

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家电科技 2019年第5期 80-82页

作者：阚苗长虹美菱股份有限公司

为了探讨不同储藏方式对大米品质的影响,以主要理化特性为指标,综合评价5℃、85%RH,25℃、60%RH,32℃、85%RH储藏方式对大米品质的影响。结果表明:5℃、85%RH、密封储藏方式能更好地抑制大米中脂肪酸值、直链淀粉含量的升高,能很好地维... 详细信息

为了探讨不同储藏方式对大米品质的影响,以主要理化特性为指标,综合评价5℃、85%RH,25℃、60%RH,32℃、85%RH储藏方式对大米品质的影响。结果表明:5℃、85%RH、密封储藏方式能更好地抑制大米中脂肪酸值、直链淀粉含量的升高,能很好地维持大米的感官,有利于大米的储藏。

关键词：大米储藏方式品质

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Unraveling and tuning the linear correlation between CH_(4) and C_(2) production rates in CO_(2) electroreduction

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Science Bulletin 2022年第10期67卷 1042-1048,M0004页

作者： Kunhao Liu Chao Yang Ruilin Wei Xingyu Ma Chen Peng Zhengzheng Liu Yangshen Chen Yaqin Yan miao kan Yaoyue Yang Gengfeng Zheng Laboratory of Advanced Materials Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFaculty of Chemistry and Materials ScienceFudan UniversityShanghai 200438China College of Chemistry and Environmental Protection Engineering Southwest Minzu UniversityChengdu 610041China

Although many catalysts have been reported for the CO_(2)electroreduction to C_(1)or C_(2)chemicals,the insufficient understanding of fundamental correlations among different products still hinders the development of universal catalyst design ***,we first discover that the surface*CO coverage is stable over a wide potential range and reveal a linear correlation between the partial current densities of CH_(4)and C_(2)products in this potential range,also supported by the theoretical kinetic *** on the mechanism that*CHO is the common intermediate in the formation of both CH_(4)(*CHO→CH4)and C_(1)(*CHO+*CO→C_(2)),we then unravel that this linear correlation is universal and the slope can be varied by tuning the surface*H or*CO coverage to promote the selectivity of CH_(4)or C_(2)products,*** proofs-of-concept,using carbon-coated Cu particles,the surface*H coverage can be increased to enhance CH_(4)production,presenting a high CO_(2)-to-CH_(4)Faradaic efficiency(FE_(CH_(4))~52%)and an outstanding CH_(4)partial current density of-337 m A cm;.On the other hand,using an Agdoped Cu catalyst,the CO_(2)RR selectivity is switched to the C_(2)pathway,with a substantially promoted FE;of 79%and a high partial current density of-421 m A cm;.Our discovery of tuning intermediate coverages suggests a powerful catalyst design strategy for different CO_(2)electroreduction pathways.

关键词： Electrochemical CO_(2)reduction Copper catalyst Reaction pathway CO coverage Linear correlation

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