Phase Interface Regulating on Amorphous/Crystalline Bismuth Catalyst for Boosted Electrocatalytic CO2 Reduction to Formate

• DOI: 10.1021/acsami.3c10011
• Publication Date: 2023-09-28T15:19:21Z
• Authors: Chenchen Qin; Li Xu; Jian Zhang; Jun Wang; Jiaxin He; Daomeng Liu; Jia Yang; Juan-Ding Xiao; Xifan Chen; Hong-Bao Li; Zhengkun Yang; Junzhong Wang
• Keywords: Bismuth; Amorphous carbon

Electroreduction of carbon dioxide into readily collectable and high-value carbon-based fuels is greatly significant to overcome the energy environmental crises yet challenging in development robust highly efficient electrocatalysts. Herein, a bismuth (Bi) heterophase electrode with enriched amorphous/crystalline interfaces was fabricated via cathodically situ transformation Bi-based metal-phenolic complexes (Bi-tannic acid, Bi-TA). Compared amorphous or crystalline Bi catalyst, structure leads significantly enhanced performance for CO2 electroreduction. In liquid-phase H-type cell, Faraday efficiency (FE) formate formation over 90% wide potential range from -0.8 -1.3 V, demonstrating high selectivity toward formate. Moreover, flow large current density reaching 600 mA cm-2 can further be rendered production. Theoretical calculations indicate that interface exhibits favorable adsorption lower barriers rate-determining step compared counterparts, thus accelerating reaction process. This work paves way rational design advanced heterointerface catalysts reduction.