21:I[432972,["/_next/static/chunks/bb923814e1f4d2e9.js","/_next/static/chunks/dd3ee9f5b7716ca6.js","/_next/static/chunks/4204a0ae82542ca8.js","/_next/static/chunks/1270dead247da766.js","/_next/static/chunks/6e1aa89a642f40be.js","/_next/static/chunks/2d7aa753e81324a8.js","/_next/static/chunks/8ffd0b71567920d8.js","/_next/static/chunks/67ea6dfd21f16c5f.js","/_next/static/chunks/24eb4379f68013fd.js","/_next/static/chunks/b8cd775ffdf935bd.js","/_next/static/chunks/983103cd9eb7b428.js","/_next/static/chunks/263f2cdcb9aa2341.js","/_next/static/chunks/294b9525248c8e5f.js"],"default"] 22:T45b,Atomically dispersed metal and nitrogen codoped carbon (M-N-C) catalysts with N-coordinated metal (MNx) sites have shown compelling performance in electrochemical CO2 reduction (ECR). However, extra uncoordinated N species commonly coexist with MNx sites in M-N-C, which are impossible to ignore due to their inevitable interference in catalytic performance. Considering this, we developed high-performance Co-N-C for ECR by diminishing the uncoordinated N species. The resulting electrocatalyst displays a CO faradic efficiency (FECO) of 99.4% with a CO current density of −24.8 mA·cm–2 at a low overpotential of 0.49 V in an H-type cell, and a high FECO over 90% is obtained in a flow cell within a wide current density window (50–600 mA·cm–2), exceeding all reported Co-N-C catalysts. Density functional theory calculations reveal that isolated CoN4 sites can reduce the energy barrier required for the formation of COOH* and suppress the occurrence of hydrogen evolution compared with CoN4 sites with extra uncoordinated N species, thus resulting in enhanced activity and selectivity in CO production.23:T493,A great challenge for electrochemical CO₂ reduction is to improve energy efficiency, which requires reducing overpotential while increasing product Faraday efficiency. Here, we designedly synthesize a hybrid electrocatalyst consisting of Fe nanoparticles, pyrrole-type Fe-N₄ sites and less-oxygenated carbon supports, which exhibits a remarkable CO Faraday efficiency above 99% at an ultralow overpotential of 21 mV, reaching the highest cathode energy efficiency of 97.1% to date. The catalyst also can afford a CO selectivity nearly 100% with a high cathode energy efficiency (>90%) at least 100 h. The combined results of control experiments, in situ characterizations and theoretical calculations demonstrate that introducing Fe nanoparticles can reduce the overpotential by accelerating the proton transfer from CO₂ to *COOH and lowering the free energy for *COOH formation, constructing pyrrole-type Fe-N₄ sites and limiting oxygen species on carbon supports can increase CO Faraday efficiency through inhibiting the H₂ evolution, thus achieving energy-efficient electrochemical CO₂ reduction to CO.24:T4c4,Abstract Atomically dispersed Fe─N─C catalysts display great potential for efficient CO production in the field of electrochemical CO 2 reduction (ECR), but still suffer from unsatisfactory activity limited by the slow proton and electron transfer during the ECR process. Here, a superior Fe─N─C electrocatalyst is designed by anchoring the individual FeN 4 sites and Fe nanoparticles onto highly conductive carbon nanotubes. The resultant catalyst displays a commendable CO partial current density of 16.01 mA cm −2 with a turnover frequency of 3519.6 h −1 at −0.65 V in an H‐type cell, and also exhibits CO selectivity > 90% under high current density over 120 mA cm −2 in a flow cell. This remarkable activity exceeds a host of previously reported Fe─N─C catalysts. The findings indicate that the carbon nanotube facilitates CO production due to its strong capability of electron transport and charge transfer. In situ spectroscopic analysis, controlled experiments, and theoretical calculations reveal that Fe nanoparticles effectively promote water dissociation and the subsequent protonation step, accelerate the formation of * COOH intermediate, and thus greatly enhance

#	Concept	H-Index	Publications	Citations
1	Engineering	3	3	165
2	Chemical Engineering	3	3	165
3	Chemistry	3	3	165
4	Catalysis	3	3	165
5	Materials Science	2	2	116

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