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| 1 | 铜基电极的改性及其在电解水制氢催化中的研究进展显示文摘金属铜(Cu)因电子电导率高、价格低廉和环境友好等优点,成为能源存储与转换领域的关键材料之一。然而,Cu因自身催化活性低和表面易腐蚀/氧化等,限制了其在电解水制氢领域的实际应用。通过对Cu进行改性,可优化电极表面对反应中间体的吸附和界面稳定性,显著提升催化性能。本文简要介绍了目前Cu基电极存在的问题,重点阐述了Cu基电极在单原子结构设计、Cu基复合材料、Cu合金化以及杂原子掺杂四方面的改性研究进展,并对析氢催化机理进行深入分析。结果表明,通过对Cu进行改性可以激活Cu位点、暴露更多活性面积和稳定界面,显著提高Cu基电极的催化活性和催化稳定性。未来,Cu催化电极的研究应注重更有效的材料改性方法,以便进一步提高其在催化反应中的应用价值。 | 石卢一 白玮纯 邓越 孙金峰 张少飞 | 2023 | 铜业工程2023，，6： | 0 |
| 2 | Strong electronic coupling of CoNi and N-doped-carbon for efficient urea-assisted H2 production at a large current density显示文摘Exploiting efficient urea oxidation reaction(UOR)and hydrogen evolution reaction(HER)catalysts are significant for energy-saving H2 production through urea-assisted water electrolysis,but it is still challenging.Herein,carbon-encapsulated CoNi coupled with CoNiMoO(CoNi@CN-CoNiMoO)is prepared by solvothermal method and calcination to enhance the activity/stability of urea-assisted water electrolysis at large current density.It exhibits good activity for UOR(E10/1,000=1.29/1.40 V)and HER(E-10/-1000=-45/-245 mV)in 1.0 M KOH+0.5 M urea solution.For the UOR||HER system,CoNi@CN-CoNiMoO only needs 1.58 V at 500 mA cm-2 and shows good stability.Density functional theory calculation suggests that the strong electronic interaction at the interface between NiCo alloy and N-doping-carbon layers can optimize the adsorption/desorption energy of UOR/HER intermediates and accelerate the water dissociation,which can expedite urea decomposition and Volmer step,thus increasing the UOR and HER activity,respectively.This work provides a new solution to design UOR/HER catalysts for H2 production through urea-assisted water electrolysis. | Guangfu Qian Jinli Chen Wenjie Jiang Tianqi Yu Kexin Tan Shibin Yin | 2023 | Carbon Energy2023，5，12： | 0 |
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