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| 1 | Single‐atomic Co‐B_(2)N_(2)sites anchored on carbon nanotube arrays promote lithium polysulfide conversion in lithium-sulfur batteries显示文摘Due to low cost,high capacity,and high energy density,lithium–sulfur(Li–S)batteries have attracted much attention;however,their cycling performance was largely limited by the poor redox kinetics and low sulfur utilization.Herein,predicted by density functional theory calculations,single‐atomic Co‐B2N2 site‐imbedded boron and nitrogen co‐doped carbon nanotubes(SA‐Co/BNC)were designed to accomplish high sulfur loading,fast kinetic,and long service period Li–S batteries.Experiments proved that Co‐B2N2 atomic sites can effectively catalyze lithium polysulfide conversion.Therefore,the electrodes delivered a specific capacity of 1106 mAh g−1 at 0.2 C after 100 cycles and exhibited an outstanding cycle performance over 1000 cycles at 1 C with a decay rate of 0.032%per cycle.Our study offers a new strategy to couple the combined effect of nanocarriers and single‐atomic catalysts in novel coordination environments for high‐performance Li–S batteries. | Zhifeng Wang Yajing Yan Yongguang Zhang Yanxu Chen Xianyun Peng Xin Wang Weimin Zhao Chunling Qin Qian Liu Xijun Liu Zhongwei Chen | 2023 | Carbon Energy2023，5，11： | 1 |
| 2 | Au nanoclusters anchored on TiO_(2) nanosheets for high-efficiency electroreduction of nitrate to ammonia显示文摘Electrocatalytic nitrate reduction reaction(NO_(3)RR)offers a unique rationale for green NH_(3) synthesis,yet the lack of high-efficiency NO_(3)RR catalysts remains a great challenge.In this work,we show that Au nanoclusters anchored on TiO_(2) nanosheets can efficiently catalyze the conversion of NO_(3)RR-to-NH_(3) under ambient conditions,achieving a maximal Faradic efficiency of 91%,a peak yield rate of 1923μg·h^(-1)·mgcat.-1,and high durability over 10 consecutive cycles,all of which are comparable to the recently reported metrics(including transition metal and noble metal-based catalysts)and exceed those of pristine TiO_(2).Moreover,a galvanic Zn-nitrate battery using the catalyst as the cathode was proposed,which shows a power density of 3.62 mW·cm^(-2) and a yield rate of 452μg·h^(-1)·mgcat.-1.Theoretical simulations further indicate that the atomically dispersed Au clusters can promote the adsorption and activation of NO_(3)-species,and reduce the NO_(3)RR-to-NH_(3) barrier,thus leading to an accelerated cathodic reaction.This work highlights the importance of metal clusters for the NH_(3) electrosynthesis and nitrate removal. | Miaosen Yang Tianran Wei Jia He Qian Liu Ligang Feng Hongyi Li Jun Luo Xijun Liu | 2024 | Nano Research2024，17，3： | 0 |
| 3 | Ni_(3)S_(2)@NiCe-LDH/NF电极的电催化析氧行为显示文摘通过水热法和快速电沉积法制备了Ni_(3)S_(2)@NiCe-LDH/NF催化电极。借助X射线衍射仪(XRD)、扫描电镜(SEM)、能谱仪(EDS)和X射线光电子能谱(XPS)对催化电极的物相、形貌和化学态结构进行表征,并在1.0 mol/L KOH碱性电解液中测试了其电催化析氧反应(OER)性能。结果表明:Ni_(3)S_(2)@NiCe-LDH/NF催化电极为雾凇状结构,在OER过程中驱动电流密度为20 mA/cm^(2)时需要339 mV的过电位,并具有53.22 mV/dec的低Tafel斜率,以及表现出良好的催化活性和稳定性。 | 贾飞宏 郭宇晨 邹祥宇 包维维 卫学玲 李文虎 焦阳 | 2023 | 材料热处理学报2023，44，10： | 0 |
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