电催化剂
法拉第效率
无定形固体
材料科学
过渡金属
退火(玻璃)
纳米技术
氟化物
降水
无机化学
冶金
化学工程
化学
结晶学
催化作用
电化学
电极
物理化学
工程类
有机化学
物理
气象学
作者
Amandine Guiet,Alexandre Simonin,Hossein Bemana,Hasan Al‐Mahayni,Junnan Li,Kiran Kuruvinashetti,Romain Moury,Annie Hémon-Ribaud,Daniel Chartrand,Vincent Maisonneuve,Jérôme Lhoste,Ali Seifitokaldani,Dominic Rochefort,Nikolay Kornienko
出处
期刊:Chem catalysis
[Elsevier]
日期:2023-05-01
卷期号:3 (5): 100595-100595
被引量:1
标识
DOI:10.1016/j.checat.2023.100595
摘要
The electrochemical conversion of NO3− to NH3 is an emerging route to an essential chemical feedstock and potential fuel. Underpinning the field’s development is the discovery of efficient electrocatalysts and insights into the reaction mechanism. To this end, a Cu-based oxyfluoride, Cu3Al2OF10, prepared through a facile co-precipitation and annealing of the corresponding hydrated fluoride r-Cu3Al2F12(H2O)12, was found to be exceptionally active, attaining a NH3 Faradaic efficiency (FE) of up to 57% for the 8-electron NO3− to NH3 pathway (−0.4 VRHE) with a mass activity of up to 1220 A.g−1 at −0.6 VRHE. Electroanalytical and operando spectroscopic investigations revealed a reversible transition to a phase entailing Cu nanoparticles embedded within the amorphous oxyfluoride matrix that was predominantly responsible for the catalyst’s activity. Overall, this work stands to open avenues for transition metal fluoride materials within the field of N-based electrocatalysis.
科研通智能强力驱动
Strongly Powered by AbleSci AI