Zhu Yanjun, Han Qiutong, Zhou Yong
National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University Nanjing 210093 P. R. China
Eco-Materials and Renewable Energy Research Center (ERERC), Jiangsu Key Laboratory for Nano Technology, Nanjing University Nanjing 210093 P. R. China.
Nanoscale Adv. 2025 Sep 9. doi: 10.1039/d5na00526d.
Ultrathin inorganic nanosheets possess a novel electronic structure that enables exceptional performance in the catalytic reduction of carbon dioxide (CO), representing a promising strategy to mitigate global warming. Bismuth selenide (BiSe) nanosheets are important topological insulators exhibiting high electrical conductivity. Through a solvothermal method followed by hydrogen annealing, selenium-vacancy-rich BiSe nanosheets with formed bismuth metal clusters are prepared. In this system, surface Se vacancies function as active centers for electron trapping and CO adsorption, while Bi metal clusters serve as reactive sites to facilitate charge transfer and catalytic reactions. This dual-functional design establishes a unidirectional electron transfer pathway from selenium vacancies to Bi metal through the topological conductive surface, thereby concentrating electrons at the Bi interface and providing abundant reducing equivalents to enhance CO yield.
超薄无机纳米片具有新颖的电子结构，使其在催化还原二氧化碳（CO）方面表现出卓越性能，这是缓解全球变暖的一种有前景的策略。硒化铋（BiSe）纳米片是重要的拓扑绝缘体，具有高电导率。通过溶剂热法随后进行氢气退火，制备出形成铋金属簇且富含硒空位的BiSe纳米片。在该体系中，表面硒空位作为电子捕获和CO吸附的活性中心，而铋金属簇作为反应位点促进电荷转移和催化反应。这种双功能设计通过拓扑导电表面建立了从硒空位到铋金属的单向电子转移途径，从而将电子集中在铋界面处，并提供丰富的还原当量以提高CO产率。
