.png){kind=icon}
.png){kind=icon}
Return
A 3D Macroporous Carbon NiCu Single-Atom Catalyst for High Current Density CO2 Electroreduction
.png){kind=icon}
OA
AI
DOI：10.1002/adfm.202419075.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Transition metal and nitrogen co-decorated carbon materials are promising platforms for CO2 electroreduction. A hard-template 2-step pyrolysis method is proposed for the fabrication of highly dispersed Ni and Cu atomic active sites on a 3D macroporous carbon matrix. The pyrrolic N-type Ni-N-x sites serve as dominant active sites toward selective CO2 electroreduction to CO. The incorporation of Cu alters the distribution of N species and simultaneously optimizes the electronic state and geometric structure of the Ni-N-x moiety, thereby improving its adsorption and activation capacity for CO2. Moreover, the isolated Cu atomic sites enhance the resistance of corresponding gas-diffusion electrodes against electrolyte flooding. The optimal catalyst 3D NiCu-69 achieves nearly exclusive production of CO with a Faraday efficiency (FECO) of 98% at a current density of -700 mA cm(-2) in a CO2-gas-fed flow-through electrolyzer and delivers a CO production rate of 1363 mol(m(2)s)(-1), which is exceeding most reported electrocatalysts. The FECO remained as high as 94% after electrolyzing at a current density of -100 mA cm(-2) for 22 h. 3D NiCu-69 exhibits a favorable performance in both acidic and neutral conditions, with a high FECO of approximate to 90.2% within the current density range of -100 to -500 mA cm(-2).
Keywords:
2-step pyrolysis
3D macroporous carbon
CO2 electroreduction
electrolyzer
single-atom catalyst
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
19
Papers:
3.4W
Citations:
32.1W
Organization
View more organizations