Bismuth Oxychloride Dispersed on Nitrogen‐Doped Carbon as Catalyst for the Electrochemical Reduction of CO₂ to Formate

Abstract

Electrochemical reduction of CO 2 has received significant interest for converting CO 2 to value added products and closing the carbon cycle. Recent advances through catalyst development have aided in satisfying the requirements of achieving a high product selectivity, activity and long-term stability. Among various industrially valuable products, formic acid has found numerous applications such asin fuel cells and textile industry. In this work, we report the synthesis of bismuth oxychloride dispersed on nitrogen-doped carbon through a facile ion adsorption process using bismuth acetate, hydrochloric acid and urea as precursors, and discuss its performance as an electrocatalyst for the electrochemical reduction of CO 2 to formate. The results show that bismuth oxychloride dispersed on nitrogen-doped carbon has good catalytic activity for CO 2 reduction to formate in 0.5 M KHCO 3 , achieving a maximum faradaic efficiency of 84.3 % at À 0.87 V versus RHE. The catalyst is found to be stable for 5 h of continuous operation and achieves a turnover frequency of 146.36 h À 1 .[a] S.

Electroreduction of Carbon Dioxide into Formate: A Comprehensive Review

“…examined the effect of using different carbon supports on the catalytic activity of copper; the rGO support showed tendency toward formic acid production. In this section, the following catalysts: tin (Sn), [96,117,122–125] bismuth (Bi), [126,127,136–142,128–135] indium (In) [143–146] and copper (Cu) [121,147–150] are discussed in more details.…”

Bismuth, a Previously Less‐studied Element, Is Bursting into New Hotspots

“…The decomposition of organic pollutants into CO 2 , H 2 O, or non‐toxic products has been considered one of the crucial applications of Bi‐based photocatalysis. Moreover, BBMs have great potential in the realization of O, C, N fixation as valuable chemicals due to their low electrochemical hydrogen evolution reactivity, [45] i. e., production of H 2 O 2 solar fuel from H 2 O and O 2 in water, [46] conversion of waste CO 2 into energy‐rich fuel methanol [47] and N 2 fixation on making ammonia, [48] as shown in Figure 2b.…”