In situ transformation of bismuth-containing precursors into ultrathin bismuth nanosheets for enhanced electrochemical CO2 reduction

Strategic catalyst modification for boosting CO2 concentration at electrode surface and easing selective CO2 reduction at higher potential

“…18 However, we found that it is very difficult to avoid oxidation under ambient atmosphere, while separating the materials from the solvent. Therefore, we have adopted a common strategy to synthesize a separable 2D BiOCl sacricial intermediate with uniform height, [20][21][22][23] followed by chemically reducing it to metallic Bi akes under the ambient atmosphere. Simple dropwise addition of hydrazine hydrate into the dissolved BiCl 3 solution in the ambient atmosphere resulted in nice uniform 2D akes of BiOCl.…”

Revealing the Intrinsic Restructuring of Bi2O3 Nanoparticles into Bi Nanosheets during Electrochemical CO2 Reduction

“…The poor long-term stability of these Bi/C NPs in both H-type cell and flow cell reactors is, however, detrimental to their use in an industrial setting. Alternatively, nanosheets (NSs), another commonly synthesized form of bismuth electrocatalysts, have been reported to exhibit superior performance for CO 2 RR. ,− Interestingly, it was also described that Bi 2 O 3 NPs can transform into 2D nanosheets after 20 linear sweep voltammetry cycles at 0 to −1.3 V versus RHE . Since only the morphology before and after the reaction was characterized in this study, it was unclear whether the evolution of the Bi 2 O 3 NPs occurred at specific junctures of the electrocatalytic protocol or if it was a more general phenomenon.…”

Renewable Hydrogen Production and Storage Via Enzymatic Interconversion of CO2 and Formate with Electrochemical Cofactor Regeneration

“…Both metal containing and non‐metal containing electrocatalysts have been reported for CO 2 reduction to formate. The former can be based on either transition metals (e. g., Ni, Rh) [28] or p‐block metals (e. g., Sn, Bi) [29,30] . Encouraging faradaic efficiencies have been calculated at a wide range of applied potentials, but low selectivity, as well as toxicity of the catalysts remain significant concerns [31] …”

“…The former can be based on either transition metals (e. g., Ni, Rh) [28] or p-block metals (e. g., Sn, Bi). [29,30] Encouraging faradaic efficiencies have been calculated at a wide range of applied potentials, but low selectivity, as well as toxicity of the catalysts remain significant concerns. [31] Bioelectrochemical systems (BES) have gained increased attention as a promising route, both to generate energy from biochemical reactions and to produce chemicals through the utilization of electricity and biocatalysts (microorganisms or enzymes).…”