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Cactus-like NC/CoxP electrode enables efficient and stable hydrogen evolution for saline water splitting

CHEN Xu ZHAO Jin-yu ZHANG Wen-sheng WANG Xiao-min

陈续, 赵金玉, 张文盛, 王晓敏. 仙人掌状的NC/CoxP自支撑电极用于盐水电解实现高效稳定析氢. 新型炭材料(中英文), 2024, 39(1): 152-163. doi: 10.1016/S1872-5805(24)60824-3
引用本文: 陈续, 赵金玉, 张文盛, 王晓敏. 仙人掌状的NC/CoxP自支撑电极用于盐水电解实现高效稳定析氢. 新型炭材料(中英文), 2024, 39(1): 152-163. doi: 10.1016/S1872-5805(24)60824-3
CHEN Xu, ZHAO Jin-yu, ZHANG Wen-sheng, WANG Xiao-min. Cactus-like NC/CoxP electrode enables efficient and stable hydrogen evolution for saline water splitting. New Carbon Mater., 2024, 39(1): 152-163. doi: 10.1016/S1872-5805(24)60824-3
Citation: CHEN Xu, ZHAO Jin-yu, ZHANG Wen-sheng, WANG Xiao-min. Cactus-like NC/CoxP electrode enables efficient and stable hydrogen evolution for saline water splitting. New Carbon Mater., 2024, 39(1): 152-163. doi: 10.1016/S1872-5805(24)60824-3

仙人掌状的NC/CoxP自支撑电极用于盐水电解实现高效稳定析氢

doi: 10.1016/S1872-5805(24)60824-3
基金项目: 国家自然科学基金(52072256);山西省重点研发计划(202102030201006,202202070301016);中央引导地方科技发展资金项目 (YDZJSX2021B005);山西省科技计划揭榜招标项目(20201101016);山西省科技创新基地建设项目(YDZJSX2022B003);山西省自然科学基金项目(20210302124308);山西省教学改革项目(2021YJJG046)
详细信息
    通讯作者:

    王晓敏,教授. E-mail:wangxiaomin@tyut.edu.cn

  • 中图分类号: TK51

Cactus-like NC/CoxP electrode enables efficient and stable hydrogen evolution for saline water splitting

More Information
  • 摘要: 设计高效、稳定的析氢催化剂是盐水电解技术发展的必然要求。本文通过原位生长策略在泡沫镍(NF)上生长NC/CoxP@NF催化剂,它由CoxP纳米线阵列与氮掺杂碳纳米片(NC)交替生长组成。在制备过程中,Co(OH)2纳米线通过内源Co2+与2−甲基咪唑的溶解配位作用在NF上原位转化为Co-MOF纳米片。仙人掌状的微观结构使NC/CoxP@NF暴露出丰富的活性位点和离子运输通道,促进了HER催化反应动力学。此外,在分级多孔的NC/CoxP@NF中,纳米线和自支撑纳米片交替生长,进一步增强了材料的结构稳定性。最重要的是,表面聚阴离子(磷酸盐)和NC纳米片保护层的形成提高了催化剂的耐腐性能。最终,NC/CoxP@NF-10表现出优异的析氢性能,在1.0 mol L−1 KOH和1.0 mol L−1 KOH + 0.5 mol L−1 NaCl条件下,分别需要107和133 mV的过电位达到10 mA cm−2的电流密度。
  • FIG. 2917.  FIG. 2917.

    FIG. 2917..  FIG. 2917.

    Figure  1.  (a) Schematic illustration of catalysts synthesis. SEM images at different magnifications: (b-d) CoxP@NF; (e-g) NC/CoxP@NF-5; (h-j) NC/CoxP@NF-10 and (k-m) NC/CoxP@NF-15

    Figure  2.  (a) TEM image; (b) HRTEM image and (c) the corresponding elemental mappings of NC/CoxP@NF-10. (d) XRD patterns and (e) the magnified diffraction peaks at the range of 10°-43° of all catalysts. (f) Raman spectra of NC/CoxP@NF-5, NC/CoxP@NF-10 and NC/CoxP@NF-15. (g) Pore distribution curve of NC/CoxP@NF-10

    Figure  3.  High-resolution XPS spectra of (a) Co 2p, (b) P 2p, (c) C 1s and (d) N 1s in catalysts

    Figure  4.  HER performance of all catalysts in 1 mol L−1 KOH solution. (a) Polarization curves. (b) The corresponding Tafel plots. (c) Scan rate dependence of the current densities. (d) EIS Nyquist plots of all electrodes (Inset is the equivalent circuit diagram)

    Figure  5.  Electrocatalytic HER performance of all catalysts in 1 mol L−1 KOH + 0.5 mol L−1 NaCl. (a) LSV polarization curves. (b) The corresponding Tafel plots. (c) Scan rate dependence of the current densities. (d) EIS Nyquist plots of all electrodes

    Figure  6.  1 mol L−1 KOH electrolyte: (a) Chronopotentiometric curves conducted at a constant current density of -100 mA cm−2. The LSV curves before and after stability tests for (b) NC/CoxP@NF-10 and (c) CoxP@NF. 1 mol L−1 KOH + 0.5 mol L−1 NaCl solution: (d) Stability tests of NC/CoxP@NF-10 and CoxP@NF. LSV curves before and after stability tests for (e) NC/CoxP@NF-10 and (f) CoxP@NF

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出版历程
  • 收稿日期:  2023-08-01
  • 修回日期:  2023-10-30
  • 网络出版日期:  2023-11-20
  • 刊出日期:  2024-02-01

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