检索结果-南通市图书馆

Regulating local coordination environment of Mg-Co single atom catalyst for improved direct methanol fuel cell cathode

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第6期11卷 1959-1969页

作者： Kaiwen Wang Hanjun Zou jiazhi meng Chaogang Ban Xue Liu Jiangping Ma Cong Wang Liyong Gan Xiaodong Han Xiaoyuan Zhou College of Physics and Center of Quantum Materials and Devices Chongqing UniversityChongqing 401331China Beijing Key Laboratory of Microstructure and Property of Advanced Materials Beijing University of TechnologyBeijing 100024China Institute of Emerging Energy Storage Materials and Equipment Chongqing 401135China Analytical and Testing Center Chongqing UniversityChongqing 401331China

Fuel cells operated with a reformate fuel such as methanol are promising power systems for portable electronic devices due to their high safety,high energy density and low pollutant ***,several critical issues including methanol crossover effect,CO-tolerance electrode and efficient oxygen reduction electrocatalyst with low or non-platinum usage have to be addressed before the direct methanol fuel cells(DMFCs)become commercially available for industrial ***,we report a highly active and selective Mg-Co dualsite oxygen reduction reaction(ORR)single atom catalyst(SAC)with porous N-doped carbon as the *** catalyst exhibits a commercial Pt/C-comparable half-wave potential of 0.806 V(versus the reversible hydrogen electrode)in acid media with good ***,practical DMFCs test achieves a peak power density of over 200 m W cm^(-2)that far exceeds that of commercial Pt/C counterpart(82 m W cm^(-2)).Particularly,the Mg-Co DMFC system runs over 10 h with negligible current loss under 10 M concentration methanol work *** results and theoretical calculations reveal that the N atom coordinated by Mg and Co atom exhibits an unconventional d-band-ditto localized p-band and can promote the dissociation of the key intermediate*OOH into*O and*OH,which accounts for the near unity selective 4e-ORR reaction pathway and enhanced ORR *** contrast,the N atom in SAC–Co remains inert in the absorption and desorption of*OOH and**** local coordination environment regulation strategy around active sites may promote rational design of high-performance and durable fuel cell cathode electrocatalysts.

关键词： Single atom catalyst Mg−N−Co DMFC Cathode

Isotype Heterojunction‑Boosted CO_(2) Photoreduction to CO

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2022年第5期14卷 34-46页

作者： Chaogang Ban Youyu Duan Yang Wang Jiangping Ma Kaiwen Wang jiazhi meng Xue Liu Cong Wang Xiaodong Han Guozhong Cao Liyong Gan Xiaoyuan Zhou College of Physics and Center of Quantum Materials and Devices Chongqing UniversityChongqing 401331People’s Republic of China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 401331People’s Republic of China Beijing Key Laboratory of Microstructure and Property of Advanced Materials Beijing University of TechnologyBeijing 100024People’s Republic of China Analytical and Testing Center Chongqing UniversityChongqing 401331People’s Republic of China Department of Materials Science and Engineering University of WashingtonSeattleWA 98195USA

Photocatalytic conversion of CO_(2) to high-value products plays a crucial role in the global pursuit of carbon–neutral *** photocatalysts,such as the isotype heterojunctions,offer an ideal paradigm to navigate the photocatalytic CO_(2) reduction reaction(CRR).Herein,we elucidate the behaviors of isotype heterojunctions toward photocatalytic CRR over a representative photocatalyst,g-C_(3)N_(4).Impressively,the isotype heterojunctions possess a significantly higher efficiency for the spatial separation and transfer of photogenerated carriers than the single *** with the intrinsically outstanding stability,the isotype heterojunctions exhibit an exceptional and stable activity toward the CO_(2) photoreduction to *** importantly,by combining quantitative in situ technique with the first-principles modeling,we elucidate that the enhanced photoinduced charge dynamics promotes the production of key intermediates and thus the whole reaction kinetics.

关键词： Isotype heterojunction g-C_(3)N_(4) CO_(2)photoreduction Charge dynamics Reaction mechanism

Bismuth clusters pinned on TiO_(2) porous nanowires boosting charge transfer for CO_(2) photoreduction to CH_(4)

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 1190-1198页

作者： jiazhi meng Kaiwen Wang Yang Wang Jiangping Ma Chaogang Ban Yajie Feng Bin Zhang Kai Zhou Liyong Gan Guang Han Danmei Yu Xiaoyuan Zhou College of Physics and Institute of Advanced Interdisciplinary Studies Chongqing UniversityChongqing 401331China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Beijing Key Lab of Microstructure and Properties of Advanced Materials Beijing University of TechnologyBeijing 100124China Analytical and Testing Center Chongqing UniversityChongqing 401331China

Artificial photosynthesis in carbon dioxide(CO_(2))conversion into value-added chemicals attracts considerable attention but suffers from the low activity induced by sluggish separation of photogenerated carriers and the kinetic bottleneck-induced unsatisfied ***,we prepare a new-style Bi/TiO_(2) catalyst formed by pinning bismuth clusters on TiO_(2) nanowires through being confined by pores,which exhibits high activity and selectivity towards photocatalytic production of CH_(4) from CO_(2).Boosted charge transfer from TiO_(2) through Bi to the reactants is revealed via in situ X-ray photon spectroscopy and time-resolved photoluminescence(PL).Further,in situ Fourier transform infrared results confirm that Bi/TiO_(2) not only overcomes the multi-electron kinetics challenge of CO_(2) to CH_(4) via boosting charge transfer,but also facilitates proton production and transfer as well as the intermediates*CHO and*CH_(3)O generation,ultimately achieving the tandem catalysis towards *** calculation also underlies that the more favorable reaction step from*CO to*CHO on Bi/TiO_(2) results in CH_(4) production with higher *** work brings new insights into rational design of photocatalysts with high performance and the formation mechanism of CO_(2) to CH_(4) for solar energy storage in future.

关键词： carbon dioxide(CO_(2))photoreduction charge transfer tandem catalysis methanation

Origin of Bismuth-Rich Strategy in Bismuth Oxyhalide Photocatalysts

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2023年第5期6卷 460-467页

作者： Yang Wang jiazhi meng Shaojie Jing Kaiwen Wang Chaogang Ban Yajie Feng Youyu Duan Jiangping Ma Liyong Gan Xiaoyuan Zhou College of Physics and Institute of Advanced Interdisciplinary Studies Chongqing UniversityChongqing 401331China Beijing Key Laboratory of Microstructure and Property of Advanced Materials Beijing University of TechnologyBeijing 100024China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 401331China Analytical and Testing Center Chongqing UniversityChongqing 401331China

Recently,the bismuth-rich strategy via increasing the bismuth content has been becoming one of the most appealing approaches to improve the photocatalytic performance of bismuth ***,insights into the mechanism behind the encouraging experiments are ***,we report the results of the theory-led comprehensive picture of bismuth-rich strategy in bismuth oxyhalide photocatalysts,selecting Bi_(5)O_(7)X(X=F,Cl,Br,I)as a ***-principle calculations revealed that the strategy enables good n-type conductivity,large intrinsic internal electric field,high photoreduction ability and outstanding harvest of visible light,and particularly ranked the intrinsic activity of this family:Bi_(5)O_(7)F>Bi_(5)O_(7)I>Bi_(5)O_(7)Br>Bi_(5)O_(7)*** experiments confirmed the theoretical predictions,and together,these results are expected to aid future development of advanced photocatalysts.

关键词： bismuth oxyhalides bismuth-rich strategy intrinsic activity photocatalytic reduction

Hybrid conductive-lithophilic-fluoride triple protection interface engineering:Dendrite-free reverse lithium deposition for high-performance lithium metal batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第2期101卷 416-428页

作者： Huiying Li Chang Hong Runming Tao Xiaolang Liu Jianxing Wang Jianyu Chen Shuhao Yao jiazhi Geng Guang Zheng Jiyuan Liang Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education School of Optoelectronic Materials & Technology Jianghan University Applied Materials Division Argonne National Laboratory State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications

Lithium metal batteries（LMBs） with high energy density are impeded by the instability of solid electrolyte interface（SEI） and the uncontrolled growth of lithium（Li） *** mitigate these challenges,optimizing the SEI structure and Li deposition behavior is the key to stable *** study novelty proposes a facile synthesis of MgF2/carbon（C） nanocomposite through the mechanochemical reaction between metallic Mg and polytetrafluoroethylene（PTFE） powders,and its modified polypropylene（PP）separator enhances LMB *** in-situ formed highly conductive fluorine-doped C species play a crucial role in facilitating ion/electron transport,thereby accelerating electrochemical kinetics and altering Li deposition *** cycling,the in-situ reaction between MgF2and Li leads to the formation of LiMg alloy,along with a LiF-rich SEI layer,which reduces the nucleation overpotential and reinforces the interphase strength,leading to homogeneous Li deposition with dendrite-free *** from these merits,the Li metal is densely and uniformly deposited on the MgF2/C@PP separator side rather than on the current collector ***,the symmetric cell with MgF2/C@PP exhibits superb Li plating/stripping performance over 2800 h at 1 mA cm-2and 2 mA h *** importantly,the assembled Li@MgF2/C@PPILiFePO4full cell with a low negative/positive ratio of 3.6delivers an impressive cyclability with 82.7% capacity retention over 1400 cycles at 1 C.

关键词： Lithium metal batteries Mechanochemical reaction MgF2 Reverse deposition Separator modification

Cortico-striatal gamma oscillations are modulated by dopamine D3 receptors in dyskinetic rats

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第4期20卷 1164-1177页

作者： Pengfei Wang Yuewei Bi Min Li jiazhi Chen Zhuyong Wang Huantao Wen Ming Zhou Minjie Luo Wangming Zhang Neurosurgery Center Department of Pediatric NeurosurgeryGuangdong Provincial Key Laboratory on Brain Function Repair and RegenerationZhujiang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina

Long-term levodopa administration can lead to the development of levodopa-induced *** oscillations are a widely recognized hallmark of abnormal neural electrical activity in levodopa-induced ***,studies have reported increased oscillation power in cases of levodopa-induced ***,little is known about how the other electrophysiological parameters of gamma oscillations are altered in levodopa-induced ***,the role of the dopamine D3 receptor,which is implicated in levodopa-induced dyskinesia,in movement disorder-related changes in neural oscillations is *** found that the cortico-striatal functional connectivity of beta oscillations was enhanced in a model of Parkinson’s ***,levodopa application enhanced cortical gamma oscillations in cortico-striatal projections and cortical gamma aperiodic components,as well as bidirectional primary motor cortex(M1)↔dorsolateral striatum gamma *** of PD128907(a selective dopamine D3 receptor agonist)induced dyskinesia and excessive gamma oscillations with a bidirectional M1↔dorsolateral striatum ***,administration of PG01037(a selective dopamine D3 receptor antagonist)attenuated dyskinesia,suppressed gamma oscillations and cortical gamma aperiodic components,and decreased gamma causality in the M1→dorsolateral striatum *** findings suggest that the dopamine D3 receptor plays a role in dyskinesia-related oscillatory activity,and that it has potential as a therapeutic target for levodopa-induced dyskinesia.

关键词： aperiodic components dopamine D3 receptor dorsolateral striatum functional connectivity gamma oscillations levodopa-induced-dyskinesia local field potentials neuromodulation Parkinson’s disease primary motor cortex

Strong coupling between a quasi-two-dimensional perovskite and a honeycomb plasmonic nanocone array

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2025年第1期13卷 80-86页

作者： ZIXUAN SONG XUEXUAN HUANG LINGYAO LI LEYI ZHAO JIAMIN XIAO jiazhi YUAN ZHIHANG WANG CHENGHAO BI WENXIN WANG Qingdao Innovation and Development Center of Harbin Engineering University College of Physics and Optoelectronic Engineering Harbin Engineering University Department of Applied Physics The Hong Kong Polytechnic University

Recently organic-inorganic perovskite has been established as a promising platform for achieving room temperature exciton-polaritons, attributable to its superior optical coherence and robust exciton binding ***, when interfaced with metallic surfaces, the rapid degradation and quenching effect in perovskite have presented significant challenges, which critically hinders the exploration of light-matter interactions within metallic plasmonic structures. In this study, we report a quasi-two-dimensional lead halide perovskite that demonstrates a pronounced strong coupling phenomenon within an array of aluminum nanocones. The investigated quasi-two-dimensional perovskite structure exhibits high photoluminescence quantum efficiency and improved stability against metallic-induced degradation. Interestingly, the periodical arraying in honeycomb formation of plasmonic structure has advantages in angle-dependent dispersions and the loss neutralizing effectively. Besides,the plasmonic cone lattice characterized by its collective surface lattice resonance, features an exceptionally small mode volume and high quality, enhancing its interaction with the perovskite. A significant Rabi splitting of243 meV is observed at an incident angle of 30°. The dynamics of the Rabi oscillation is revealed by transient absorption spectra and theoretically analyzed by cavity quantum electrodynamics. This advancement in polariton research paves the way for novel applications, including quantum sources, enhanced photon-electron conversion efficiencies, and low-threshold lasing.

关键词： Cavity quantum electrodynamics Light matter interactions Optical constants Quantum efficiency Surface plasmon resonance Ti:sapphire lasers

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

专精特新“小巨人”认定与双元创新正向跃迁

华东经济管理 2025年第2期39卷 24-36页

作者：付馨苇谢家智西南大学经济管理学院重庆400715

双元创新正向跃迁有助于企业跳脱既定研发轨迹。文章基于专精特新“小巨人”认定这一准自然实验,探究其对双元创新正向跃迁的影响效应。研究发现:专精特新“小巨人”认定能够促进企业双元创新正向跃迁,且供应链扩充与分析师关注是其中... 详细信息

双元创新正向跃迁有助于企业跳脱既定研发轨迹。文章基于专精特新“小巨人”认定这一准自然实验,探究其对双元创新正向跃迁的影响效应。研究发现:专精特新“小巨人”认定能够促进企业双元创新正向跃迁,且供应链扩充与分析师关注是其中的重要机制;异质性分析显示,在失败容忍程度较高、管理层较自信、人力资本水平较高及数字化转型程度较深的样本中,专精特新“小巨人”认定对企业双元创新正向跃迁的助推效应更为显著;进一步检验发现,财政补贴和税收优惠强化了专精特新“小巨人”认定对企业双元创新正向跃迁的激励效应,而政府采购的作用尚未显现。研究结论可为专精特新“小巨人”认定、企业双元创新正向跃迁提供有益参考。

关键词：专精特新“小巨人” 双元创新创新跃迁供应链分析师

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

助磨剂影响矿物浮选的作用机理及研究进展

材料导报 2025年第3期39卷 96-102页

作者：白鹏飞杨聪仁马昆林丁亚蓉詹启贤孟庆胤陈荣健范佳志中南大学土木工程学院长沙410083 中南大学资源加工与生物工程学院长沙410083 伊春鹿鸣矿业有限公司黑龙江伊春153000

磨矿-浮选是一个复杂的物理化学反应体系,矿粒的表面性质和矿浆性质直接决定了矿物浮选的效果。为了提高磨矿效率、节能降耗,常在磨矿过程中添加具有助磨效果的化学试剂,但是助磨剂的掺入改变了矿物的表面性质和矿浆性质,对后续的浮选... 详细信息

磨矿-浮选是一个复杂的物理化学反应体系,矿粒的表面性质和矿浆性质直接决定了矿物浮选的效果。为了提高磨矿效率、节能降耗,常在磨矿过程中添加具有助磨效果的化学试剂,但是助磨剂的掺入改变了矿物的表面性质和矿浆性质,对后续的浮选过程会产生不同的影响。助磨剂会对矿物的粒度、表面性质(晶体结构、表面形貌、表面电位和表面能等)和矿浆性质(黏度和pH值等)产生重要影响;从浮选动力学的角度来讲,助磨剂对上述因素的影响最终会导致矿粒在气泡表面上的碰撞与粘附概率发生变化,其作用机理有待进一步深入研究。本文基于已有文献资料,梳理了助磨剂影响矿物浮选和浮选动力学的主要作用机制及最新研究进展,以期为助磨剂在磨矿中的应用和浮选工艺的改进提供研究基础。

关键词：浮选助磨剂浮选动力学作用机理