Very Highly Efficient Reduction of CO2 to CH4 Using Metal-Free N-Doped Carbon Electrodes X. Sun, X. Kang, Q. Zhu, J. Ma, G. Yang, Z. Liu, B. Han Chem. Sci. DOI: 10.1039/C5SC04158A 以不含金属的氮杂碳为催化剂,离子液体为电解质,将CO2还原为CH4的法拉第效率为93.5%,电流密度比Cu电极高6倍. 发现痕量的水对离子液体中的电催化有帮助.