Morphology and composition-controllable synthesis of copper sulfide nanocrystals for electrochemical reduction of CO2 to HCOOH

Hydrothermal Synthesis of CuS Catalysts for Electrochemical CO2 Reduction: Unraveling the Effect of the Sulfur Precursor

“…For copper metal compounds, the introduced elements will interact with copper to offer abundant binding sites for intermediate species and thus will affect the CO 2 RR performance. , The copper sulfide compound (CuS x ) with low cost and high availability represents a promising catalyst candidate for the CO 2 RR. The introduced sulfur atom plays important roles in suppressing the HER and tailoring the adsorption and desorption of the key intermediates in the CO 2 RR. , CuS catalysts have been reported to be capable of electrochemically reducing CO 2 to formate. − The selectivity of the CuS catalysts in CO 2 RR toward formate production depends heavily on surface morphology, particle size, and initial sulfur content, as well as S dopants . Chen et al prepared CuS catalysts with varied morphologies and compositions by tuning the Cu/S feed ratio and reaction temperature for electrochemical CO 2 reduction.…”

“…Chen et al prepared CuS catalysts with varied morphologies and compositions by tuning the Cu/S feed ratio and reaction temperature for electrochemical CO 2 reduction. A higher Cu/S feed ratio and higher temperature in solvothermal synthesis resulted in CuS nanoflowers with relatively higher FE (∼52%) toward HCOOH production . Shinagawa et al studied the effects of the particle size and sulfur content on the CO 2 RR performance of sulfur-modified copper catalysts.…”

“…7,9 CuS catalysts have been reported to be capable of electrochemically reducing CO 2 to formate. 9−13 The selectivity of the CuS catalysts in CO 2 RR toward formate production depends heavily on surface morphology, 12 particle size, and initial sulfur content, 10 as well as S dopants. 9 Chen et al prepared CuS catalysts with varied morphologies and compositions by tuning the Cu/S feed ratio and reaction temperature for electrochemical CO 2 reduction.…”

“…A higher Cu/S feed ratio and higher temperature in solvothermal synthesis resulted in CuS nanoflowers with relatively higher FE (∼52%) toward HCOOH production. 12 Shinagawa et al studied the effects of the particle size and sulfur content on the CO 2 RR performance of sulfur-modified copper catalysts. The selectivity of formate was positively associated with the increasing initial particle size.…”

Hierarchical S-modified Cu porous nanoflakes for efficient CO2electroreduction to formate

“…27 Subsequent works also obtained similar results for high formate selectivity on Cu-S electrodes. [28][29][30] However, to date, the activity of Cu-S for formate production is too low for practical application (current density lower than 100 mA cm −2 ). Hence, it is urgent to design and synthesize high-efficiency catalysts to improve the activity of Cu-S catalysts for practical application.…”