Boosting CO₂ electroreduction to CO with abundant nickel single atom active sites

Abstract

Conversion of CO2 into value-added chemicals through electrocatalytic CO2 reduction reaction (CO2RR) is considered as an up-and-coming way to facilitate renewable closed carbon cycle and energy storage. Therefore, the development...

Optimizing the Electrocatalytic Selectivity of Carbon Dioxide Reduction Reaction by Regulating the Electronic Structure of Single‐Atom M‐N‐C Materials

“…synthesized single‐atom Ni‐N‐C materials with Ni‐N 4 coordination structure, on which the FE CO reached 98%. [ 118 ]…”

“…[117] Wang et al synthesized single-atom Ni-N-C materials with Ni-N 4 coordination structure, on which the FE CO reached 98%. [118] The modulation of electronic structure can facilitate the reaction, and the strong chemical bonds between individual metal atoms and the substrate can increase the stability. In addition, single metal atom with unsaturated coordination environment acts as the active site, which can improve the catalytic performance.…”

Emerging materials for electrochemical CO2reduction: progress and optimization strategies of carbon-based single-atom catalysts

“…100,144 ) under a high-temperature inert atmosphere (N 2 , Ar, etc.). 13,145 In contrast to the conventional method of synthesizing single-atom catalysts at low temperatures, high-temperature treatment can strengthen the interaction between metal single atoms and different carriers or induce the formation of covalent bonds and enhance the dispersion and stability of single atoms. 146 Several SACs with metal-N X active sites have been prepared employing this method.…”

“…Wang and coworkers obtained single-atom nickel catalysts (Ni-SAs-NC) synthesized via pyrolysis of nickel-based polymer precursors (Ni-TIPA). 145 The coordination conformation of the Ni-SAs-NC catalyst was determined by fitting FT-EXAFS, with Ni atoms coordinated to four N atoms, yielding a Ni–N 4 coordination structure. Ni-SAs-NC displayed remarkable CO 2 RR catalytic performance, with a FE CO of 98% at −0.65 V RHE , and the current density of the CO fraction greatly exceeded that of Ni-NPs-NC and NC.…”

Electroreduction of CO2 to syngas with controllable H2/CO ratios in a wide potential range over Ni–N co-doped ultrathin carbon nanosheets

“…Compared with the heteroatom-doped carbon catalysts, Ni-N-doped carbon materials have the advantages of higher atomic utilization, higher intrinsic activity and controllable active sites. [16][17][18][19][20][21][22] Benefiting from those merits, it is possible to control the amount of CO by regulating the number of Ni-N active sites, thereby adjusting the proportion of syngas.…”