Ko, Young Jin Kim, Jun Yong Lee, Woong Hee Kim M.G. Seong T.-Y. 박종길 정연주 Min, Byoung Koun Lee, Wook Seong Lee, Dong Ki Oh, Hyung Suk 2024-01-12T03:31:37Z 2024-01-12T03:31:37Z 2022-05-04 2022-04 2041-1723 https://pubs.kist.re.kr/handle/201004/76751 Though stannic oxides can catalyze CO2 electroreduction to formate, the stability of these catalysts has been limited. Here, the authors demonstrate stable fluorine-doped SnO2 materials toward formate production at current densities of >300 mA/cm(2). The electrosynthesis of formate from CO2 can mitigate environmental issues while providing an economically valuable product. Although stannic oxide is a good catalytic material for formate production, a metallic phase is formed under high reduction overpotentials, reducing its activity. Here, using a fluorine-doped tin oxide catalyst, a high Faradaic efficiency for formate (95% at 100 mA cm(-2)) and a maximum partial current density of 330 mA cm(-2) (at 400 mA cm(-2)) is achieved for the electroreduction of CO2. Furthermore, the formate selectivity (approximate to 90%) is nearly constant over 7 days of operation at a current density of 100 mA cm(-2). In-situ/operando spectroscopies reveal that the fluorine dopant plays a critical role in maintaining the high oxidation state of Sn, leading to enhanced durability at high current densities. First-principle calculation also suggests that the fluorine-doped tin oxide surface could provide a thermodynamically stable environment to form HCOO* intermediate than tin oxide surface. These findings suggest a simple and efficient approach for designing active and durable electrocatalysts for the electrosynthesis of formate from CO2. English Nature Publishing Group Exploring dopant effects in stannic oxide nanoparticles for CO2 electro-reduction to formate Article 10.1038/s41467-022-29783-7 1 Nature Communications, v.13, no.1 Nature Communications 13 1 Y scie scopus 000785774400002 2-s2.0-85128718627 Multidisciplinary Sciences Science & Technology - Other Topics Article GAS-DIFFUSION ELECTRODE ELECTROCHEMICAL REDUCTION CURRENT-DENSITY CARBON-DIOXIDE ELECTROREDUCTION TIN CATALYSTS ACID CONVERSION EVOLUTION