大学化学 >> 2020, Vol. 35 >> Issue (4): 1-9.doi: 10.3866/PKU.DXHX201912044

所属专题: 全国大学生化学实验创新设计竞赛

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太阳能驱动Ni-N掺杂多孔碳高效电催化还原CO2为CO

丁少松, 岳通, 王兴谱, 高家楠, 朱英()   

  • 收稿日期:2019-12-12 录用日期:2019-12-16 发布日期:2020-03-05
  • 通讯作者: 朱英 E-mail:zhuying@buaa.edu.cn
  • 基金资助:
    国家自然科学基金(51672019);国家自然科学基金(51872013)

Ni-N Doped Porous Carbon for Electrocatalytic Reduction of CO2 into CO Driven by Solar Energy

Ding Shaosong, Yue Tong, Wang Xingpu, Gao Jianan, Zhu Ying()   

  • Received:2019-12-12 Accepted:2019-12-16 Published:2020-03-05
  • Contact: Zhu Ying E-mail:zhuying@buaa.edu.cn

摘要:

利用可再生能源将二氧化碳(CO2)电催化还原为有价值的化学品和燃料,不仅可缓解温室效应,而且可实现碳资源的循环利用。以蛋白胨与盐形成的凝胶为原料,经高温热解后制备了用于电还原CO2的Ni-N掺杂碳多孔催化剂。该催化剂表现出优异的电催化还原CO2为CO的性能,在电压为-0.66 V(vs.RHE)下,CO的法拉第效率为92.0%,过电位为550 mV,还原电流密度为2.5 mA·cm-2。该催化剂优异的CO2的电催化活性归因于其存在的Ni-N活性位点和高度多孔的结构。此外,利用太阳能电池产生的电能,该催化剂可持续进行CO2电催化还原为CO,为CO2的资源化利用提供了有价值的参考。

关键词: Ni-N掺杂多孔碳, CO2电还原, 太阳能, CO产物

Abstract:

The electroreduction of CO2 into value-added chemicals and fuels has garnered a broad interest by using renewable clean energy, due to both alleviating global warming and completing the carbon cycle. Herein, a high-performance Ni-N doped porous carbon catalyst was prepared through pyrolysis of hydrogen containing peptone, NiCl2, and NaCl made by a freeze dry method. The Ni-N-doped porous carbon catalyst displayed an excellent performance of CO2 electroreduction with a Faraday efficiency of 92.0% at -0.66 V (vs. RHE), 550 mV overpotential, and 2.5 mA·cm-2 current density. The catalytic performances were attributed to the Ni-N active sites and porous structures. In addition, CO2 electroreduction to CO was performed continuously by using solar energy, which may provide a valuable reference for carbon cycle in future.

Key words: Ni-N doped porous carbon, CO2 electroreduction, Solar energy, CO product

MSC2000: 

  • G64