eScience最新文献_第9页

Electronic structure regulation of noble metal-free materials toward alkaline oxygen electrocatalysis 无贵金属材料对碱性氧电催化的电子结构调控

eScience Pub Date : 2023-08-01 DOI: 10.1016/j.esci.2023.100141

Xia Wang , Minghao Yu , Xinliang Feng

{"title":"Electronic structure regulation of noble metal-free materials toward alkaline oxygen electrocatalysis","authors":"Xia Wang , Minghao Yu , Xinliang Feng","doi":"10.1016/j.esci.2023.100141","DOIUrl":"https://doi.org/10.1016/j.esci.2023.100141","url":null,"abstract":"<div>Developing highly efficient, inexpensive catalysts for oxygen electrocatalysis in alkaline electrolytes (i.e., the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER)) is essential for constructing advanced energy conversion techniques (such as electrolyzers, fuel cells, and metal–air batteries). Recent achievements in efficient noble metal-free ORR and OER catalysts make the replacement of conventional noble metal counterparts a realistic possibility. In particular, various electronic structure regulation strategies have been employed to endow these oxygen catalysts with attractive physicochemical properties and strong synergistic effects, providing significant fundamental understanding to advance in this direction. This review article summarizes recently developed electronic structure regulation strategies for three types of noble metal-free oxygen catalysts: transition metal compounds, single-atom catalysts, and metal-free catalysts. We begin by briefly presenting the basic ORR and OER reaction mechanisms, following this with an analysis of the fundamental relationship between electronic structure and intrinsic electrocatalytic activity for the three categories of catalysts. Subsequently, recent advances in electronic structure regulation strategies for noble metal-free ORR and OER catalysts are systematically discussed. We conclude by summarizing the remaining challenges and presenting our outlook on the future for designing and synthesizing noble metal-free oxygen electrocatalysts.</div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"3 4","pages":"Article 100141"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49879075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Unlocking the charge doping effect in softly intercalated ultrathin ferromagnetic superlattice 解锁软插层超薄铁磁超晶格中的电荷掺杂效应

eScience Pub Date : 2023-06-01 DOI: 10.1016/j.esci.2023.100117

Liang Hu , Bingzhang Yang , Zhipeng Hou , Yangfan Lu , Weitao Su , Lingwei Li

{"title":"Unlocking the charge doping effect in softly intercalated ultrathin ferromagnetic superlattice","authors":"Liang Hu , Bingzhang Yang , Zhipeng Hou , Yangfan Lu , Weitao Su , Lingwei Li","doi":"10.1016/j.esci.2023.100117","DOIUrl":"https://doi.org/10.1016/j.esci.2023.100117","url":null,"abstract":"<div>The electrolyte-assisted exfoliation strategy is widely employed to synthesize ultrathin two-dimensional (2D) materials. Yet, spins in 2D magnets are susceptible to the electrolyte due to the underlying charge doping effect. Hence, it is crucial to understand and trace the doping process during the delamination of 2D magnets. Taking the prototype Fe3GeTe2, we utilized soft organic cations to exfoliate the bulk and obtain a freestanding organic–inorganic hybrid superlattice with a giant electron doping effect as high as 6.9 × 1014/cm2 (∼1.15 electrons per formula unit). A remarkable ferromagnetic transition exceeding 385 K was revealed in these superlattices, together with unique anisotropic saturation magnetization. The doping enhanced the in-plane electron–phonon coupling and thus optimized originally poor indirect double-exchange scenario for spin electrons. The emerging vertical magnetization shift phenomenon served to evaluate the uniformity of charge doping. The above findings provide a new perspective for understanding the role of parasitic charge in 2D magnetism.</div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"3 3","pages":"Article 100117"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49884204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modulating single-molecule charge transport through external stimulus 通过外部刺激调节单分子电荷输运

eScience Pub Date : 2023-06-01 DOI: 10.1016/j.esci.2023.100115

Qi Zou , Jin Qiu , Yaping Zang , He Tian , Latha Venkataraman

引用次数: 0

A green repair pathway for spent spinel cathode material: Coupled mechanochemistry and solid-phase reactions 废尖晶石正极材料的绿色修复途径:机械化学与固相反应的耦合

eScience Pub Date : 2023-06-01 DOI: 10.1016/j.esci.2023.100110

Jiao Lin , Xu Chen , Ersha Fan , Xiaodong Zhang , Renjie Chen , Feng Wu , Li Li

{"title":"A green repair pathway for spent spinel cathode material: Coupled mechanochemistry and solid-phase reactions","authors":"Jiao Lin , Xu Chen , Ersha Fan , Xiaodong Zhang , Renjie Chen , Feng Wu , Li Li","doi":"10.1016/j.esci.2023.100110","DOIUrl":"https://doi.org/10.1016/j.esci.2023.100110","url":null,"abstract":"<div>A way of directly repairing spent lithium-ion battery cathode materials is needed in response to environmental pollution and resource depletion. In this work, we report a green repair method involving coupled mechanochemistry and solid-state reactions for spent lithium-ion batteries. During the ball-milling repair process, an added manganese source enters into the degraded LiMn2O4 (LMO) crystal structure in order to fill the Mn vacancies formed by Mn deficiency due to the Jahn–Teller effect, thereby repairing the LMO's chemical composition. An added carbon source acts not only as a lubricant but also as a conductor to improve the material's electrical conductivity. Meanwhile, mechanical force reduces the crystal size of the LMO particles, increasing the amount of active sites for electrochemical reactions. Jahn–Teller distortion is successfully suppressed by cation disorder in the LMO material. The cycling stability and rate performance of the repaired cathode material are thereby greatly improved, with the discharge specific capacity being more than twice that of commercial LMO. The proposed solid-state mechanochemical in situ repair process, which is safe for the environment and simple to use, may be extended to the repair of other waste materials without consuming highly acidic or alkaline chemical reagents.</div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"3 3","pages":"Article 100110"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49883647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Crystallographic engineering of Zn anodes for aqueous batteries 水电池用锌阳极的晶体学工程

eScience Pub Date : 2023-06-01 DOI: 10.1016/j.esci.2023.100120

Shuang Wu , Zhenglin Hu , Pan He , Lingxiao Ren , Jiaxing Huang , Jiayan Luo

引用次数: 7

Advances in bismuth-telluride-based thermoelectric devices: Progress and challenges 碲化铋基热电器件的进展:进展与挑战

eScience Pub Date : 2023-06-01 DOI: 10.1016/j.esci.2023.100122

Tianyi Cao , Xiao-Lei Shi , Meng Li , Boxuan Hu , Wenyi Chen , Wei-Di Liu , Wanyu Lyu , Jennifer MacLeod , Zhi-Gang Chen

{"title":"Advances in bismuth-telluride-based thermoelectric devices: Progress and challenges","authors":"Tianyi Cao , Xiao-Lei Shi , Meng Li , Boxuan Hu , Wenyi Chen , Wei-Di Liu , Wanyu Lyu , Jennifer MacLeod , Zhi-Gang Chen","doi":"10.1016/j.esci.2023.100122","DOIUrl":"https://doi.org/10.1016/j.esci.2023.100122","url":null,"abstract":"<div>By effectively converting waste heat into electricity, thermoelectric materials and devices can provide an alternative approach to tackle the energy crisis. Amongst thermoelectric materials, bismuth telluride (Bi2Te3) and its derivatives exhibit high figure of merit ZT values in the near-room-temperature region and show great potential for application in thermoelectric devices. Considering the rapid development of Bi2Te3-based thermoelectric materials and their devices in the last few years, a short and systematic review is much needed. Here, we summarize the novel designs, properties, and applications of Bi2Te3-based thermoelectric devices in different contexts, including wearable, portable, implantable, and cross-disciplinary applications. The challenges and outlook for Bi2Te3-based thermoelectric devices are also considered. This work will guide the future development of Bi2Te3-based thermoelectric devices that target broader and more practical applications.</div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"3 3","pages":"Article 100122"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49884203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Intermetallic-driven highly reversible electrocatalysis in Li–CO2 battery over nanoporous Ni3Al/Ni heterostructure 纳米多孔Ni3Al/Ni异质结构下锂- co2电池金属间驱动的高可逆电催化

eScience Pub Date : 2023-06-01 DOI: 10.1016/j.esci.2023.100114

Tianzhen Jian , Wenqing Ma , Caixia Xu , Hong Liu , John Wang

{"title":"Intermetallic-driven highly reversible electrocatalysis in Li–CO2 battery over nanoporous Ni3Al/Ni heterostructure","authors":"Tianzhen Jian , Wenqing Ma , Caixia Xu , Hong Liu , John Wang","doi":"10.1016/j.esci.2023.100114","DOIUrl":"https://doi.org/10.1016/j.esci.2023.100114","url":null,"abstract":"<div>Li–CO2 batteries, which integrate CO2 utilization and electrochemical energy storage, offer the prospect of utilizing a greenhouse gas and providing an alternative to the well-established lithium-ion batteries. However, they still suffer from rather limited reversibility, low energy efficiency, and sluggish CO2 redox reaction kinetics. To address these key issues, a nanoporous Ni3Al intermetallic/Ni heterojunction (NP–Ni3Al/Ni) is purposely engineered here via an alloying–etching protocol, whereby the unique interactions between Al and Ni in Ni3Al endow NP-Ni3Al/Ni with optimum reactant/product adsorption and thus unique catalytic performance for the CO2 redox reaction. Furthermore, the nanoporous spongy structure benefits mass transport as well as discharge product storage and enables a rich multiphase reaction interface. In situ Raman studies and theoretical simulations reveal that both CO2 reduction and the co-decomposition of Li2CO3 and C are distinctly promoted by NP-Ni3Al/Ni, thereby greatly improving catalytic activity and stability. NP-Ni3Al/Ni offers promising application potential in Li–CO2 batteries, with its scalable fabrication, low production cost, and superior catalytic performance.</div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"3 3","pages":"Article 100114"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49883645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Enhancing performance of tin-based perovskite solar cells via fused-ring electron acceptor 通过熔环电子受体提高锡基钙钛矿太阳能电池的性能

eScience Pub Date : 2023-06-01 DOI: 10.1016/j.esci.2023.100113

Chengbo Wang , Yiting Jiang , Hanyu Xu , Nanlong Zheng , Guangsheng Bai , Yanxin Zha , Hao Qi , Zuqiang Bian , Xiaowei Zhan , Zhiwei Liu

引用次数: 2

Hydrogen isotope effects: A new path to high-energy aqueous rechargeable Li/Na-ion batteries 氢同位素效应:制备高能锂/钠离子电池的新途径

eScience Pub Date : 2023-06-01 DOI: 10.1016/j.esci.2023.100121

Xue-Ting Li , Jia Chou , Yu-Hui Zhu , Wen-Peng Wang , Sen Xin , Yu-Guo Guo

引用次数: 6

Modulating microenvironments to enhance CO2 electroreduction performance 调节微环境以提高CO2电还原性能

eScience Pub Date : 2023-06-01 DOI: 10.1016/j.esci.2023.100119

Dan Wang , Junjun Mao , Chenchen Zhang , Jiawei Zhang , Junshan Li , Ying Zhang , Yongfa Zhu

引用次数: 3