All-solid-state mechanochemical synthesis of Cu2+-doped MIL-53(Fe) for high-efficient nitrate electroreduction to ammonia
Year: 2025
Type: article
Abstract: Electrocatalytic nitrate reduction has emerged as a promising strategy for sustainable ammonia synthesis, providing the dual advantage of mitigating nitrate pollution and producing value-added green ammonia. However, enhancing intrinsic catalytic activity and catalytic site accessibility remains a challenge for further improving the performance of nitrate electroreduction to ammonia. Herein, a series of gradient Cu2+-doped MIL-53(Fe) electrocatalysts were synthesized via an all-solid-state mechanochemical synthesis method for electrocatalytic nitrate-to-ammonia conversion. MIL-53(Fe)–CuB exhibits a large NH3 production rate of 2391 ± 327 μg h−1 mgcat −1 at −0.6 V vs RHE and a high Faradaic efficiency of 82.1% ± 1.2% at −0.3 V vs RHE in 1 M KOH with 100 ppm NO3 −, demonstrating an excellent electrocatalytic performance for nitrate reduction. This work reveals that Cu2+-doping in mechanochemically synthesized Fe-metal-organic frameworks (MOFs) boosts nitrate reduction efficiency and selectivity, while broadening research on foreign metal ion anchoring in MOF electrocatalysis.
Source: Nanotechnology
Authors: Wang Zhang, Tianci Feng, Shiqi Li, Xin Zhang, Tang Wang, Yu Zhou, Long Lin, Lin Qiao, Xiao Han, Rui Li
Language: English
Subfield: Catalysis
Field: Chemical Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,325
OpenAlex ID: W4414223405