A hierarchical Single-Atom Ni-N3-C catalyst for electrochemical CO2 reduction to CO with Near-Unity faradaic efficiency in a broad potential range

Promoting CO2-to-CO Electroreduction via the Active-Site Engineering of Atomically Precise Silver Nanoclusters

“…The initial CO selectivity was 90%, with a CO 2 -to-CO conversion energy efficiency of 57%, which is significantly higher than that reported for the most efficient electrocatalysts. [10][11][12][13][14][15]52,53 These findings demonstrate that the activesite-engineered AuAg 12 Au 12 NCs are highly active and stable CO 2 RR electrocatalysts. However, note that the CO selectivity was slightly reduced to approximately 80% due to the enhanced HER on the wetted AuAg 12 Au 12 /GDE during prolonged electrolysis.…”

“…However, a significant energy loss remains owing to the ohmic drop in the flow cell, limiting their practical applications. , Recently, zero-gap CO 2 electrolyzers that mimic the membrane electrode assembly (MEA) of fuel cells have been developed . Multiple zero-gap CO 2 electrolyzers employing Ag and Ni catalysts have demonstrated highly efficient electrochemical CO 2 -to-CO conversion. − However, their energy efficiencies for CO 2 -to-CO conversion are in the range of 41–48% at the industry-relevant current density (∼200 mA/cm 2 ), significantly below the commercially viable level. Developing efficient electrocatalysts for electroreduction of CO 2 remains a highly challenging task.…”

“…The full-cell potential of the NC-equipped zero-gap cell is also significantly lower than that of CO 2 electrolyzers using the best electrocatalysts (Figure b and Table S3). − ,, Finally, the long-term stability of the active-site-engineered AuAg 12 Au 12 NCs was investigated by conducting galvanostatic electrolysis in the zero-gap CO 2 electrolyzer at a commercially relevant current density of 200 mA/cm 2 . The full-cell potential of the electrolyzer was maintained at 2.13 ± 0.03 V during 24 h of operation (Figure c).…”

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

“…The ligand structure and specific composition of SACs have a significant impact on catalytic activity, selectivity, and stability. Various synthetic strategies have been proposed in the last decade or so, such as high-temperature pyrolysis, 70,79 impregnation, 31 atomic layer deposition, 80 ion exchange, 38,81 and other strategies. However, the synthesis process remains challenging due to the high surface energy of the atoms, which is highly susceptible to aggregation and deactivation during preparation and catalysis.…”

Constructing a built-in electric field by anchoring highly dispersed Zn single atoms on UiO-66-NH2 for efficient CO2 photoreduction

“…[1][2][3][4][5] In this context, in September 2020, our country put forward "peaking carbon emissions by 2030 and achieving carbon neutrality by 2060". 6 Moreover, the "double carbon" target was incorporated into the general layout of ecological civilization construction, aiming to solve a series of problems caused by the greenhouse effect. [7][8][9] The realization of efficient CO 2 conversion has increasingly become a hot issue of study.…”