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| 1 | Heterogeneous lamellar-edged Fe-Ni(OH)_(2)/Ni_(3)S_(2)nanoarray for efficient and stable seawater oxidation显示文摘Development of efficient non-precious catalysts for seawater electrolysis is of great significance but challenging due to the sluggish kinetics of oxygen evolution reaction(OER)and the impairment of chlorine electrochemistry at anode.Herein,we report a heterostructure of Ni_(3)S_(2)nanoarray with secondary Fe-Ni(OH)_(2)lamellar edges that exposes abundant active sites towards seawater oxidation.The resultant Fe-Ni(OH)_(2)/Ni_(3)S_(2)nanoarray works directly as a free-standing anodic electrode in alkaline artificial seawater.It only requires an overpotential of 269 mV to afford a current density of 10 mA·cm^(-2)and the Tafel slope is as low as 46 m V·dec^(-1).The 27-hour chronopotentiometry operated at high current density of 100 mA·cm^(-2)shows negligible deterioration,suggesting good stability of the Fe-Ni(OH)_(2)/Ni_(3)S_(2)@NF electrode.Faraday efficiency for oxygen evolution is up to〜95%,revealing decent selectivity of the catalyst in saline water.Such desirable catalytic performance could be benefitted from the introduction of Fe activator and the heterostructure that offers massive active and selective sites.The density functional theory(DFT)calculations indicate that the OER has lower theoretical overpotential than Cl_(2) evolution reaction in Fe sites,which is contrary to that of Ni sites.The experimental and theoretical study provides a strong support for the rational design of high-performance Fe-based electrodes for industrial seawater electrolysis. | Baihua Cui Zheng Hu Chang Liu Siliang Liu Fangshuai Chen Shi Hu Jinfeng Zhang Wei Zhou Yida Deng Zhenbo Qin Zhong Wu Yanan Chen Lifeng Cui Wenbin Hu | 2021 | Nano Research2021，14，4： | 7 |
| 2 | 变废为宝:富缺陷镍掺杂磷酸铁锂用于高效电催化析氧反应显示文摘在电池废弃物可持续管理中,锂离子电池(LIB)电极材料的高效回收是一个重要而又具有挑战性的工作.本文报道了一种简单且经济有效的方法,将废旧电池正极材料磷酸铁锂(LiFePO_(4))转化为高性能的镍铁氧/氢氧化物(NiFeOxHy)催化剂用于析氧反应(oxygen evolution reaction,OER).采用湿法浸渍合成的Ni-LiFePO_(4)在电化学氧化过程中进一步转变成了富缺陷的NiFeOxHy纳米片.镍促进剂的引入和前驱物形貌的原位转化增强了金属位点之间的电子相互作用,同时产生了大量的缺陷.电化学测试结果表明,转化后的Ni-LiFePO_(4)在10 mA cm^(-2)电流密度下的过电位仅为285 mV,Tafel斜率为45 mV dec^(-1),优于前驱物LiFePO_(4),甚至优于基准贵金属催化剂RuO_(2).密度泛函理论(density functional theory,DFT)计算表明,Ni的引入优化了*OOH中间体的自由能,从而有效激活了Fe位点;而丰富的氧缺陷促进了氧解吸步骤,二者协同提高了LiFePO_(4)的催化析氧反应性能.作为一种绿色和通用的方法,该研究为基于废旧电池材料规模化制备优良电催化剂提供了新的机遇. | 崔柏桦 刘畅 张金凤 陆继军 刘丝靓 陈方帅 周伟 钱国余 王志 邓意达 陈亚楠 胡文彬 | 2021 | Science China Materials2021，64，11： | 3 |
| 3 | NiS/Ni_(3)S_(2)@NiWO_(4)纳米阵列用于构造能量密度创新高的全固态混合超级电容器显示文摘混合型纳米电极材料的合理设计及合成对于其不同的应用具有重要意义,尤其是对于可用于下一代电动汽车和电子设备供电的高效纳米结构超级电容器(SCs)储能器件.本文报道了一种简便可控合成核-壳Ni_(3)S_(2)@NiWO_(4)纳米阵列的方法,并将其用于混合超级电容器的独立电极.在5 mA cm^(-2)的条件下,所制备的Ni_(3)S_(2)@NiWO_(4)独立电极表现出高达2032μA h cm^(-2)的面积容量;即使电流密度增至50 mA cm^(-2),其容量保留率仍为63.6%.更重要的是,在功率密度为3.128 mW cm^(-2)时,该Ni_(3)S_(2)@NiWO_(4)纳米阵列混合超级电容器仍表现出1.283 mW h cm^(-2)的最大能量密度;而在能量密度为0.753 mW h cm^(-2)时,该超级电容器表现出的最大功率密度为41.105 mW cm^(-2).此外,该混合超级电容器在连续10,000次循环后仍能保持89.6%的原始容量,从而进一步证明其优异的稳定性.本研究为合理设计各种核壳金属纳米结构提供了便捷途径,有助于促进其在高性能储能器件领域的广泛应用. | 陈方帅 崔晓亚 刘畅 崔柏桦 窦树明 许洁 刘丝靓 张鸿 邓意达 陈亚楠 胡文彬 | 2021 | Science China Materials2021，64，4： | 2 |
| 4 | Development of Metal and Metal-Based Composites Anode Materials for Potassium-Ion Batteries显示文摘Potassium-ion batteries(KIBs)are considered the next powerful potential generation energy storage system because of substantial potassium resource availability and similar characteristics with lithium.Unfortunately,the actual application of KIBs is inferior to that of lithium-ion batteries(LIBs),in which the fi nite energy density,ordinary circular life,and underdeveloped fabrication technique dominate the key constraints.Various works have recently been directed to growing novel anode electrodes with superior electrochemical capability.Noticeably,metals/metal oxides materials(e.g.,Sb,Sn,Zn,SnO_(2),and MoO_(2))have been widely investigated as KIBs anodes because of high theoretical capacity,suggesting outstanding promise for high-energy KIBs.In this review,the latest research of metals/metal oxides electrodes for potassium storage is summarized.The major strategies to control the electrochemical property of metals/metal oxides electrodes are discussed.Finally,the future investigation foreground for these anode electrodes has been proposed. | Jie Xu Shuming Dou Yaqi Wang Qunyao Yuan Yida Deng Yanan Chen | 2021 | Transactions of Tianjin University2021，27，3： | 1 |
| 5 | 焦炭水分问题的探讨显示文摘 | 陈灵芬 | 2000 | 柳钢科技2000，，B03： | 0 |
| 6 | 高熵合金在电催化氧还原反应中的应用及发展显示文摘开发用于氧气还原反应(ORR)的高效催化剂是提高燃料电池和金属-空气电池性能的关键。然而,ORR是动力学缓慢反应,存在着很高的过电势,从而降低了燃料电池和金属-空气电池的能量转换效率。高熵合金是由5种或5种以上金属元素等(近)物质的量比形成的一种新型合金材料。凭借其独特的组分与结构优势,高熵合金能够高效加速ORR、降低ORR过电势,表现出对ORR的显著催化作用。文章主要综述了高熵合金的结构、性能特点、制备方法以及在催化ORR方面的应用,并提出了挑战和发展展望。 | 何小波 丁露 银凤翔 李国儒 | 2024 | 常州大学学报(自然科学版)2024，36，1： | 0 |
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