催化作用
电化学
电解
电解质
化学工程
电极
材料科学
可逆氢电极
钴
电解水
碳纳米管
电催化剂
无机化学
化学
纳米技术
工作电极
有机化学
物理化学
工程类
作者
Lei Xiong,Xianbiao Fu,Yu Zhou,Pei Nian,Zheng Wang,Qin Yue
标识
DOI:10.1021/acscatal.2c06106
摘要
Electrochemical CO2-to-CO conversion is a significant alternative to lower CO2 emission and build carbon-neutral processes, as well as produce CO, which can directly serve as a syngas precursor for Fischer–Tropsch synthesis. However, the easy water flooding of the gas diffusion electrode (GDE) employed in a flow cell during CO2 reduction reaction (CO2RR) electrolysis remains a tough problem. Consequently, it breaks the electrolyte/catalyst/CO2 triphase interface and lowers the FECO. Herein, the combined inarching of amino-substituted cobalt phthalocyanine (CoPc-NH2) and octadecylamine (ODA) onto the surface of the CNT via an amide bond was designed and fabricated. The obtained composite catalyst, labeled as CoPc-CNT-ODA, shows atomically dispersed metal active sites endowed with superior and stable hydrophobicity. When applied to CO2RR in a flow cell, the CoPc-CNT-ODA electrode displays a high CO faradic efficiency (FECO) of 97.7% and a partial current density (jCO) of 154.8 mA·cm–2 at an applied potential of −1.0 V (vs RHE). Moreover, the FECO values are all above 90% from −0.8 to −1.2 V (vs RHE). Even after electrolyzing at −1.0 V for 12 h, the FECO still remains at 88.3%, implying the superior stability of the CoPc-CNT-ODA electrode. The proposed methodology for GDE/catalyst improvement can be extended to other triphase interfaces involved in catalytic systems.
科研通智能强力驱动
Strongly Powered by AbleSci AI