Promotion of CO Electroreduction on Bismuth Nanosheets with Cerium Oxide nanoparticles.

Formic acid (HCOOH) is a highly energy efficient product of the electrochemical CO reduction reaction (CORR). Bismuth-based catalysts have shown promise in the conversion of CO to formic acid, but there is still a great need for further improvement in selectivity and activity. Herein, we report the preparation of Bi nanosheets decorated by cerium oxide nanoparticles (CeO) with high Ce/Ce ratio and rich oxygen vacancies.

Controlled Synthesis of Intermetallic Au Bi Nanocrystals and Au Bi/Bi Hetero-Nanocrystals with Promoted Electrocatalytic CO Reduction Properties.

The electrocatalytic properties of metal nanoparticles (NPs) strongly depend on their compositions and structures. Rational design of alloys and/or heterostructures provides additional approaches to modifying their surface geometric and electronic structures for optimized electrocatalytic performance. Here, a solution synthesis of freestanding intermetallic Au Bi NPs, the heterostructures of Au Bi/Bi hetero-NPs, and their promoted electrocatalytic CO reduction reaction (CO RR) performances were reported.

Promoting the Electrocatalytic Reduction of CO on Ultrathin Porous Bismuth Nanosheets with Tunable Surface-Active Sites and Local pH Environments.

Electrochemical CO reduction reaction (CORR) yielding value-added chemicals provides a sustainable approach for renewable energy storage and conversion. Bismuth-based catalysts prove to be promising candidates for converting CO and water into formate but still suffer from poor selectivity and activity and/or sluggish kinetics. Here, we report that ultrathin porous Bi nanosheets (Bi-PNS) can be prepared through a controlled solvothermal protocol.

Modulating the electrocatalytic CO reduction performances of bismuth nanoparticles with carbon substrates with controlled degrees of oxidation.

The catalytic performances of metal nanoparticles can be widely tuned and promoted by the metal-support interactions. Here, we report that the morphologies and electrocatalytic CO reduction reaction (CORR) properties of bismuth nanoparticles (BiNPs) can be rationally modulated by their interactions with carbon black (CB) supports by controlling the degree of surface oxidation. Appropriately oxidized CB supports can provide sufficient oxygen-containing groups for anchoring BiNPs with tunable sizes and surface areas, desirable key intermediate adsorption abilities, appropriate surface wettability, and adequate electron transfer abilities.