Tailoring the hierarchical porous nitrogen-doped carbon structures loaded single-atomic Ni catalyst for promoting CO2 electrochemical reduction at low CO2 concentration

A strategy for promoting the performance of single-atomic Ni catalyst for electrochemical reduction of CO2 to CO at low CO2 concentration is reported. By constructing the advanced hierarchical porous structure especially surface micropores, the local CO2 concentration around active sites could be enriched, thus significantly improving the partial current density of CO (jCO) in diluted CO2 concentration.