Nitrogen-doped tubular carbon foam electrodes for efficient electroreduction of CO2 to syngas with potential-independent CO/H2 ratios

A series of N-doped carbon foam tubular electrodes are proposed as both gas diffusers and self-supported electrocatalysts for stable production of tunable syngas (CO/H₂ ratio, 1 : 3 to 2 : 1) in a wide potential range (−0.5 V to −1.3 V vs. RHE).