共查询到20条相似文献,搜索用时 8 毫秒
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Engineering Catalytic Active Sites on Cobalt Oxide Surface for Enhanced Oxygen Electrocatalysis 下载免费PDF全文
Xiaopeng Han Guowei He Yu He Jinfeng Zhang Xuerong Zheng Lanlan Li Cheng Zhong Wenbin Hu Yida Deng Tian‐Yi Ma 《Liver Transplantation》2018,8(10)
Tuning the catalytic active sites plays a crucial role in developing low cost and highly durable oxygen electrode catalysts with precious metal‐competitive activity. In an attempt to engineer the active sites in Co3O4 spinel for oxygen electrocatalysis in alkaline electrolyte, herein, controllable synthesis of surface‐tailored Co3O4 nanocrystals including nanocube (NC), nanotruncated octahedron (NTO), and nanopolyhedron (NP) anchored on nitrogen‐doped reduced graphene oxide (N‐rGO), through a facile and template‐free hydrothermal strategy, is provided. The as‐synthesized Co3O4 NC, NTO, and NP nanostructures are predominantly enclosed by {001}, {001} + {111}, and {112} crystal planes, which expose different surface atomic configurations of Co2+ and Co3+ active sites. Electrochemical results indicate that the unusual {112} plane enclosed Co3O4 NP on rGO with abundant Co3+ sites exhibit superior bifunctional activity for oxygen reduction and evolution reactions, as well as enhanced metal–air battery performance in comparison with other counterparts. Experimental and theoretical simulation studies demonstrate that the surface atomic arrangement of Co2+/Co3+ active sites, especially the existence of octahedrally coordinated Co3+ sites, optimizes the adsorption, activation, and desorption features of oxygen species. This work paves the way to obtain highly active, durable, and cost‐effective electrocatalysts for practical clean energy devices through regulating the surface atomic configuration and catalytic active sites. 相似文献
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Electronic and Defective Engineering of Electrospun CaMnO3 Nanotubes for Enhanced Oxygen Electrocatalysis in Rechargeable Zinc–Air Batteries 下载免费PDF全文
Shengjie Peng Xiaopeng Han Linlin Li Shulei Chou Dongxiao Ji Huangjiao Huang Yonghua Du Jian Liu Seeram Ramakrishna 《Liver Transplantation》2018,8(22)
Rational design and massive production of bifunctional catalysts with superior oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activities are essential for developing metal–air batteries and fuel cells. Herein, controllable large‐scale synthesis of sulfur‐doped CaMnO3 nanotubes is demonstrated via an electrospinning technique followed by calcination and sulfurization treatment. The sulfur doping can not only replace oxygen atoms to increase intrinsic electrical conductivity but also introduce abundant oxygen vacancies to provide enough catalytically active sites, which is further demonstrated by density functional theory calculation. The resulting sulfur‐modified CaMnO3 (CMO/S) exhibits better electrocatalytic activity for ORR and OER in alkaline solution with higher stability performance than the pristine CMO. These results highlight the importance of sulfur treatment as a facile yet effective strategy to improve the ORR and OER catalytic activity of the pristine CaMnO3. As a proof‐of‐concept, a rechargeable Zn–air battery using the bifunctional catalyst exhibits a small charge–discharge voltage polarization, and long cycling life. Furthermore, a solid‐state flexible and rechargeable Zn–air battery gives superior discharge–charge performance and remarkable stability. Therefore, the CMO/S nanotubes might be a promising replacement to the Pt‐based electrocatalysts for metal–air batteries and fuel cells. 相似文献
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Zn–air Batteries: Interpenetrating Triphase Cobalt‐Based Nanocomposites as Efficient Bifunctional Oxygen Electrocatalysts for Long‐Lasting Rechargeable Zn–Air Batteries (Adv. Energy Mater. 15/2018) 下载免费PDF全文
Yi Jiang Ya‐Ping Deng Jing Fu Dong Un Lee Ruilin Liang Zachary Paul Cano Yangshuai Liu Zhengyu Bai Sooyeon Hwang Lin Yang Dong Su Weiguo Chu Zhongwei Chen 《Liver Transplantation》2018,8(15)
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Zinc‐Air Batteries: NiFe Layered Double Hydroxide Nanoparticles on Co,N‐Codoped Carbon Nanoframes as Efficient Bifunctional Catalysts for Rechargeable Zinc–Air Batteries (Adv. Energy Mater. 21/2017) 下载免费PDF全文
Qing Wang Lu Shang Run Shi Xin Zhang Yufei Zhao Geoffrey I. N. Waterhouse Li‐Zhu Wu Chen‐Ho Tung Tierui Zhang 《Liver Transplantation》2017,7(21)
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Zinc‐Air Batteries: Atomic Modulation of FeCo–Nitrogen–Carbon Bifunctional Oxygen Electrodes for Rechargeable and Flexible All‐Solid‐State Zinc–Air Battery (Adv. Energy Mater. 13/2017) 下载免费PDF全文
Chang‐Yuan Su Hui Cheng Wei Li Zhao‐Qing Liu Nan Li Zhufeng Hou Fu‐Quan Bai Hong‐Xing Zhang Tian‐Yi Ma 《Liver Transplantation》2017,7(13)
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Jang‐Soo Lee Sun Tai Kim Ruiguo Cao Nam‐Soon Choi Meilin Liu Kyu Tae Lee Jaephil Cho 《Liver Transplantation》2011,1(1):2-2
In the past decade, there have been exciting developments in the field of lithium ion batteries as energy storage devices, resulting in the application of lithium ion batteries in areas ranging from small portable electric devices to large power systems such as hybrid electric vehicles. However, the maximum energy density of current lithium ion batteries having topatactic chemistry is not sufficient to meet the demands of new markets in such areas as electric vehicles. Therefore, new electrochemical systems with higher energy densities are being sought, and metal‐air batteries with conversion chemistry are considered a promising candidate. More recently, promising electrochemical performance has driven much research interest in Li‐air and Zn‐air batteries. This review provides an overview of the fundamentals and recent progress in the area of Li‐air and Zn‐air batteries, with the aim of providing a better understanding of the new electrochemical systems. 相似文献
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Interfacial Roles: Defective Carbon–CoP Nanoparticles Hybrids with Interfacial Charges Polarization for Efficient Bifunctional Oxygen Electrocatalysis(Adv. Energy Mater. 18/2018) 下载免费PDF全文
Yunxiang Lin Li Yang Youkui Zhang Hongliang Jiang Zijian Xiao Chuanqiang Wu Guobin Zhang Jun Jiang Li Song 《Liver Transplantation》2018,8(18)
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Lithium‐Oxygen Batteries: Stabilization of Li Metal Anode in DMSO‐Based Electrolytes via Optimization of Salt–Solvent Coordination for Li–O2 Batteries (Adv. Energy Mater. 14/2017) 下载免费PDF全文
Bin Liu Wu Xu Pengfei Yan Sun Tai Kim Mark H. Engelhard Xiuliang Sun Donghai Mei Jaephil Cho Chong‐Min Wang Ji‐Guang Zhang 《Liver Transplantation》2017,7(14)