Quasi-square-shaped cadmium hydroxide nanocatalysts for electrochemical CO₂ reduction with high efficiency

Abstract

Powered by a renewable electricity source, electrochemical CO2 reduction reaction is a promising solution to facilitate the carbon balance. However, it is still a challenge to achieve a desired product...

Electrochemical CO2/CO Reduction and C–C Coupling Path for Mimicking Fischer–Tropsch Synthesis over Cadmium Electrodes

“…The conversion of CO 2 into chemical fuels is a significant challenge for the future energy and environmental roadmap. − Two strategic approaches have been employed to accelerate this task, including the electrochemical CO 2 reduction (EC CO 2 R) method and the development of suitable electrodes. − Various pure metals from the periodic table have been extensively tested as electrodes for EC CO 2 R, showing different CO 2 reduction products such as CO and formate. The selectivity and productivity of these metals depend on their electron configuration and the nature of their surface states. − For instance, In and Sn in the p-block have shown high Faradaic efficiency (FE) and selectivity for formate production, − while Cu in group 11 has been found to be effective in producing CH 4 , C 2 H 4 , and alcohols. − Zn has been widely studied for producing syngas (CO and H 2 ) or CO. − However, cadmium (Cd), which belongs to the same group 12 as Zn, has relatively been less employed for CO 2 reduction. − Ongoing research on pure metals is opening up new CO 2 reaction pathways by using new reaction conditions such as electrolytes and surface engineering of support electrodes. − …”

Ionic Liquids in Metal, Photo-, Electro-, and (Bio) Catalysis

“…2081 Cathodes composed of Cdhy-QS@C on Ni foam in 0.5 mol/L [C 4 C 1 Im][PF 6 ] in CH 3 CN electrolyte produced CO with 99.5% FE and a high current density of 201.2 mA/cm 2 in CPE at −2.5 V vs. Ag/ Ag + . 2083 Finally, electrocatalytic systems composed of inert carbon electrodes and transition metal coordination compounds were also tested for CO 2 RR (entries 142−148, Table 29). The electrocatalytic process with well-defined molecular structures 29).…”

“…Both works used [C 4 C 1 Im]­[PF 6 ] dissolved in CH 3 CN as the electrolyte, although water was added to the study with the Zn compound . Cathodes composed of Cdhy-QS@C on Ni foam in 0.5 mol/L [C 4 C 1 Im]­[PF 6 ] in CH 3 CN electrolyte produced CO with 99.5% FE and a high current density of 201.2 mA/cm 2 in CPE at −2.5 V vs. Ag/Ag + …”

A conductive catecholate-based framework coordinated with unsaturated bismuth boosts CO2 electroreduction to formate

“…2h was attributed to the vibration of the Bi-O entities, providing convincing evidence for forming Bi-HHTP. 16,28,29 Furthermore, we carried out in situ Raman tests to prove the robust stability of Bi-HHTP in 0.5 M KHCO 3 aqueous solution (Fig. 2i).…”