Graphitic carbon nitride with the pyridinic N substituted by Al and Si as efficient photocatalysts for CO2 reduction

Si- and Al-doped g-C 3 N 4 exhibit excellent activity and selectivity in producing HCOOH and CH 4 from the CO 2 RR respectively, with the catalytic performance comparable to that of noble-metal doped g-C 3 N 4 .