Enhancing electroreduction of CO₂ over Bi₂WO₆ nanosheets by oxygen vacancies

Abstract

The rich oxygen vacancies in Bi2WO6 nanosheets can efficiently enhance CO2 electroreduction to CO.

Efficient electrocatalytic reduction of carbon dioxide to ethylene on copper–antimony bimetallic alloy catalyst

“…Recently, Cu-based binary alloys have attracted great attention for their CO2 reduction reaction (CO2RR), as their electronic structure and binding energy can be easily modified by adding a second metal. This leads to a remarkable enhancement in catalytic activity with respect to different products [22,23]. Some excellent studies have also been carried out on this topic.…”

Optimization Strategies for Selective CO2 Electroreduction to Fuels

“…Further mechanistic exploration showed that the OV can not only stabilize *CO and *CHO intermediates, but also facilitate the *CH 2 adsorption and thus promote the dimerization of *CH 2 to produce C 2 H 4 . Similarly, the Bi 2 WO 6 nanosheets delivered 11% higher maximal FE CO and higher j after introducing OV into the structure [89,90]. The significance of OV was even more pronounced in amorphous metal oxide.…”

Enhanced Electroconversion CO2‐to‐Formate by Oxygen‐Vacancy‐Rich Ultrasmall Bi‐Based Catalyst Over a Wide Potential Window

“…This suggests that Vo-BOC/G can provide more electrochemically active sites for CO 2 RR. [14,19] When the current densities were re-normalized by the ECSA, the j formate of Vo-BOC/G at À 1.2 V was still 3.4 times higher than that of BOC/G (Figure 3b), suggesting a much higher intrinsic catalytic activity of Vo-BOC/G. [6,12] The kinetics of CO 2 -to-formate conversion was investigated by Tafel plot (Figure 3c).…”

“…Oxygen vacancy (Vo) engineering has been considered to be a promising strategy to facilitate CO 2 adsorption accompanying electron transfer to CO 2 to form *CO 2 À species. [18][19] The presence of Vo endows the surface with abundant electron-rich sites, which are able to donate electronic density to acidic species (such as CO 2 ), and, therefore, indulges CO 2 adsorption and subsequent activation. For example, Fan et al [20] reported a strategy for preparing Vo-rich Bi 2 O 2 CO 3 nanosheets (BOC-NSs) with the size of around 500 nm by electrochemical in situ reduction of BiPO 4 precursor.…”

“…Oxygen vacancy (Vo) engineering has been considered to be a promising strategy to facilitate CO 2 adsorption accompanying electron transfer to CO 2 to form *CO 2 − species [18–19] . The presence of Vo endows the surface with abundant electron‐rich sites, which are able to donate electronic density to acidic species (such as CO 2 ), and, therefore, indulges CO 2 adsorption and subsequent activation.…”