|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 基于范德华铁电异质结的具有亚5nm沟道亚热电子场效应晶体管显示文摘本文展示了基于铁电范德华异质结的具有小于5 nm沟道宽度的二维亚热电子场效应晶体管.该器件分别由石墨烯作为电极,二硫化钼作为导电沟道, CuInP2S6作为铁电介电层.研究表明,所制造的长沟道器件在室温下具有3个数量级的开关比,几乎无回滞,并具有亚热电子的开关特性.此外,本文使用金属碳纳米管作为有效的栅极制备了超短沟道器件.该器件同样表现出亚热电子开关特性,室温下亚阈值摆幅最小可达6.1 mV/dec. | 王峰 刘佳 黄文浩 程瑞清 尹蕾 王俊俊 Marshet Getaye Sendeku 张玉 詹雪莹 单崇新 王振兴 何军 | 2020 | Science Bulletin2020，65，17： | 4 |
| 2 | Reconfigurable photovoltaic effect for optoelectronic artificial synapse based on ferroelectric p-n junction显示文摘Neuromorphic machine vision has attracted extensive attention on wide fields.However,both current and emerging strategies still suffer from power/time inefficiency,and/or low compatibility,complex device structure.Here we demonstrate a driving-voltage-free optoelectronic synaptic device using non-volatile reconfigurable photovoltaic effect based on MoTe_(2)/α-In_(2)Se_(3) ferroelectric p-n junctions.This function comes from the non-volatile reconfigurable built-in potential in the p-n junction that is related to the ferroelectric polarization inα-In_(2)Se_(3).Reconfigurable rectification behavior and photovoltaic effect are demonstrated firstly.Notably,the figure-of-merits for photovoltaic effect like photoelectrical conversion efficiency non-volatilely increases more than one order.Based on this,retina synapse-like vision functions are mimicked.Optoelectronic short-term and long-term plasticity,as well as basic neuromorphic learning and memory rule are achieved without applying driving voltage.Our work highlights the potential of ferroelectric p-n junctions for enhanced solar cell and low-power optoelectronic synaptic device for neuromorphic machine vision. | Yanrong Wang Feng Wang Zhenxing Wang Junjun Wang Jia Yang Yuyu Yao Ningning Li Marshet Getaye Sendeku Xueying Zhan Congxin Shan Jun He | 2021 | Nano Research2021，14，11： | 2 |
| 3 | 单原子钌分散的TiO_(2)促进高效水氧化产过氧化氢显示文摘电催化两电子水氧化为分布式合成H_(2)O_(2)提供了一个有效的途径.但是由于缺乏合适的阳极电催化剂,通过两电子水氧化合成H_(2)O_(2)难以兼得高选择性和高产率.本文将钌单原子可控地引入到TiO_(2)中,用于促进高效水氧化产H_(2)O_(2).研究发现,钌单原子的引入优化了材料对含氧中间体的吸附,在获得高电流密度的同时促进了H_(2)O_(2)产生.具体来说,通过对钌掺杂浓度的调控,所合成催化剂在120 mA cm^(-2)的电流密度下实现了62.8%的法拉第效率,并且H_(2)O_(2)产率高达24.2μmol min-1cm^(-2)(10 min内H_(2)O_(2)积累超过400 ppm).本文不仅证明了在高电流密度下高效率产H_(2)O_(2)的可能性,同时也验证了在电催化水氧化过程中调节中间体吸附的重要性. | 王兆磊 徐文海 谭国英 段欣璇 袁碧晨 Marshet Getaye Sendeku 刘海 李天水 王枫梅 邝允 孙晓明 | 2023 | Science Bulletin2023，68，6： | 0 |
| 4 | Trimetallic nanostructures and their applications in electrocatalytic energy conversions显示文摘The advancement and growth of nanotechnology lead to realizing new and novel multi-metallic nanostructures with well-defined sizes and morphology,resulting in an improvement in their performance in various catalytic applications.The trimetallic nanostructured materials are synthesized and designed in different architectures for energy conversion electrocatalysis.The as-synthesized trimetallic nanostructures have found unique physiochemical properties due to the synergistic combination of the three different metals in their structures.A vast array of approaches such as hydrothermal,solvothermal,seedgrowth,galvanic replacement reaction,biological,and other methods are employed to synthesize the trimetallic nanostructures.Noteworthy,the trimetallic nanostructures showed better performance and durability in the electrocatalytic fuel cells.In the present review,we provide a comprehensive overview of the recent strategies employed for synthesizing trimetallic nanostructures and their energy-related applications.With a particular focus on hydrogen evolution,alcohol oxidations,oxygen evolution,and others,we highlight the latest achievements in the field. | Shushay Hagos Gebre Marshet Getaye Sendeku | 2022 | Journal of Energy Chemistry2022，31，2： | 0 |
| 5 | 钨掺杂镍铁水滑石高效电催化析氧反应显示文摘电解水对制备可持续和清洁的氢气能源至关重要。电解水的阳极析氧反应设计复杂的4-电子转移过程,所需能耗较高,是电解水的速控步骤。催化剂对于析氧反应的进行具有重要作用。镍铁水滑石是最具潜力的碱性非贵金属析氧反应(OER)催化剂,但是由于水滑石导电性差、活性位点暴露不充分、对反应中间体吸附较弱等问题,催化活性还需要进一步提高。如何提升催化活性已经被科学家们广泛关注,比如:制造缺陷、掺杂、将水滑石剥离为单层结构和组装为阵列结构等。在本论文中,通过简单的“一锅法”醇解合成了一系列不同量W掺杂NiFe-LDH的样品。XRD结果表明合成的NiFeW-LDH的衍射峰与完美NiFe-LDH标准卡片相同,没有其他的衍射峰,表明W没有单独成相,被成功掺杂进入NiFe-LDH。扫描电镜表明NiFeW-LDH为纳米片(尺寸约为~500 nm)组成的3d立体花状结构,且材料中Ni、Fe和W均匀分布。XPS表明材料中W的价态为6+,与未掺杂的NiFe-LDH相比,Fe向高价态移动,表面吸附的OH增多。在密度泛函理论(DFT)计算中,结果同样表明W6+掺杂有利于H2O和O*中间体的吸附,提高了Fe位点的活性。在1 mol∙L^(−1) KOH中,NiFeW-LDH达到10 mA·cm^(−2)所需过电位是199和237 mV,这比大多数的NiFe基粉末催化剂的性能好。综上,实验和计算表明W掺杂调控催化剂中Fe位点电子结构,优化对反应中间体的吸附,使催化剂具有更高活性。 | 段欣漩 Marshet Getaye Sendeku 张道明 周道金 徐立军 高学庆 陈爱兵 邝允 孙晓明 | 2024 | 物理化学学报2024，40，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员