镍纳米颗粒调控MOF基镍-氮碳催化剂高效电催化还原CO2的研究
Nickel nanoparticles-controlled MOF-based Ni-NC catalyst for efficient electrocatalytic reduction of CO2
曹泽宇 1张心爱 1张博 1刘雪铃 1李劲超 1张亚萍1
作者信息
- 1. 西南科技大学环境友好能源材料国家重点实验室,西南科技大学生物质材料教育部工程研究中心,西南科技大学材料与化学学院,四川 绵阳 621010
- 折叠
摘要
通过碳化负载镍络合物的沸石咪唑骨架(ZIF-8)合成了一种高性能镍-氮-碳催化剂(Ni-NC).通过透射电镜、BET、X射线光电子能谱仪对材料的多孔结构及金属-氮的配位情况进行表征.结果表明,合成的Ni-NC催化剂表现出优异的CO2 ER活性和选择性:在较低的过电位 490 mV下达到 92.6%的CO法拉第效率,并在-0.7V达到最大值94.6%,电流密度为20.6 mA/cm2,性能优于未负载镍的氮掺杂多孔碳,表明镍纳米颗粒在催化反应过程中起着至关重要的作用.此外,在 10h的电解中,CO法拉第效率可保持在90%以上.合成的Ni-NC催化剂在电催化还原CO2 为CO方面具有广阔的应用前景.
Abstract
A high performance Ni-NC catalyst is synthesized through carbonizing zeolite imidazole framework-8(ZIF-8)supported with nickel complex.The porous structure and the metal-nitrogen coordination of as-synthesized catalyst are characterized by means of transmission electron microscopy,BET and X-ray photoelectron spectroscopy.It is shown that this Ni-NC catalyst shows excellent activity and selectivity in electrocatalysis reduction of CO2.Its CO Faradaic efficiency achieves 92.6%at a low overpotential of 490 mV,and reaches the maximum value of 94.5%at-0.7 V.The current density is 20.6 mA·cm-2.It is shown that this Ni-NC catalyst has a higher performance than the nitrogen-doped porous carbon without Ni,indicating that Ni nanoparticle plays a crucial role in the catalytic process.In addition,the CO Faradaic efficiency of the catalyst can be maintained over 90%during 10 h of electrolysis.These results indicate that the synthesized Ni-NC catalyst has a broad application prospect in electrocatalytic reduction of CO2 to CO.
关键词
CO2电催化还原/Ni-NC催化剂/多孔碳材料/MOFKey words
electrocatalysis reduction of CO2/Ni-NC catalyst/porous carbon material/MOF引用本文复制引用
出版年
2024
NETL
NSTL
万方数据