Layered bismuth oxide/bismuth sulfide supported on carrageenan derived carbon for efficient carbon dioxide electroreduction to formate

Simultaneous facilitation of CO2adsorption and proton feeding in Bi/Bi2O3heterostructure nanosheets for enhanced electroreduction of CO2to formate in a wide potential window

“…The main reasons for the low catalytic performance of Bi-based catalysts are (i) extraordinarily weak adsorption of inert CO 2 onto the catalyst surface, 18–20 which is the first step in the ERCF process and (ii) insufficient proton feeding from the dissociation of H 2 O for HCOO* intermediate formation, which has been widely considered as the rate-limiting step of the ERCF process. 21–24 Therefore, further studies are required to resolve these issues for improving j formate while maintaining a high FE formate over a wide potential window.…”

Modulation of the electronic structure of metallic bismuth catalysts by cerium doping to facilitate electrocatalytic CO2 reduction to formate

“…[13][14][15][16][17][18][19][20][21] Specically, Bi-based materials have gained signicant attention as a prominent research area and made some progress due to their cost-effectiveness, abundance in the earth, non-toxicity, and superior catalytic activity. [22][23][24][25] Signicantly, current research tends to focus on the Bi(III) species contained in various Bi-based compounds, such as oxides, suldes, and composites. 22,23,25 However, the CO 2 RR is a cathodic electrolysis process at high reduction potential, where Bi(III) species are prone to reduction during electrocatalysis.…”

“…[22][23][24][25] Signicantly, current research tends to focus on the Bi(III) species contained in various Bi-based compounds, such as oxides, suldes, and composites. 22,23,25 However, the CO 2 RR is a cathodic electrolysis process at high reduction potential, where Bi(III) species are prone to reduction during electrocatalysis. 24,[26][27][28] This susceptibility leads to a reductive reconstruction at the electrocatalyst's surface, complicating the evaluation of the catalytic mechanism.…”

“…3f, our reported Ce 2 -Bi@C CO 2 RR catalyst demonstrates superior selectivity of formate and long-term durability obtained by using ooded half-cells compared with the majority of Bi-based catalysts reported in recent years. 17,19,22,24,25,30,31,[53][54][55][56][57][58] Finally, in situ attenuated total reectance infrared (ATR-IR) spectroscopy and density functional theory (DFT) calculations were conducted to explore the possible reaction pathway and further elucidate the origin of observed improvement in CO 2 RR performance for the Ce 2 -Bi@C catalyst. Fig.…”

“…3f, our reported Ce 2 –Bi@C CO 2 RR catalyst demonstrates superior selectivity of formate and long-term durability obtained by using flooded half-cells compared with the majority of Bi-based catalysts reported in recent years. 17,19,22,24,25,30,31,53–58…”