标题（中文）：具有丰富晶界的Bi纳米颗粒/ Bi₂O₃纳米片用于有效电催化还原CO₂

标题（英文）：

Bi nanoparticles/Bi₂O₃ nanosheets with abundant grain boundaries for efficient electrocatalytic CO₂ reduction

刊物名称及期号、页码：

Electrochimica Acta, 2019 (298), 580-586

作者姓名（中文）：

李乐，马德琨，齐菲宣羽，陈伟，黄少铭

作者姓名（英文）：

Le Li, De-Kun Ma, Feixuanyu Qi, Wei Chen, Shaoming Huang

摘要（英文）：

Nanostructured Bi electrocatalysts for CO₂ reduction have attracted much attention because of their many advantages such as low cost, good stability, environmentally friendly nature, and ease of synthesis. However, it is critical to further enhance its electrocatalytic performance from the perspective of practical application. Considering that grain boundaries (GBs) possess highly active sites and can tune the selectivity of the products through stabilizing the reaction intermediates, here Bi nanoparticles/Bi₂O₃ nanosheets (Bi NPs/Bi₂O₃ NSs) with abundant GBs were synthesized through a controlled hydrothermal reduction route. The as-obtained products showed a considerable partial current density (24.4 mA cm^-2), high selectivity (~100%), and excellent durability (> 24 h) for the electrocatalytic CO2 reduction into formate. Our work showed that microstructures of Bi derived from chemical reduction rather than conventional electrochemical reduction played key roles in the aspect of boosting their electrocatalytic CO₂ reduction performance. GBs engineering provided a new strategy for designing highly efficient CO₂ reduction electrocatalysts.

原文链接： https://doi.org/10.1016/j.electacta.2018.12.116