Journal ArticleDOI
Achieving Selective and Efficient Electrocatalytic Activity for CO2 Reduction Using Immobilized Silver Nanoparticles.
Cheonghee Kim,Hyo Sang Jeon,Hyo Sang Jeon,Taedaehyeong Eom,Michael Shincheon Jee,Michael Shincheon Jee,Hyungjun Kim,Cynthia M. Friend,Byoung Koun Min,Byoung Koun Min,Byoung Koun Min,Yun Jeong Hwang,Yun Jeong Hwang +12 more
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TLDR
DFT calculations enlightened that the specific interaction between Ag nanoparticle and the anchoring agents modified the catalyst surface to have a selectively higher affinity to the intermediate COOH over CO, which effectively lowers the overpotential.Abstract:
Selective electrochemical reduction of CO2 is one of the most sought-after processes because of the potential to convert a harmful greenhouse gas to a useful chemical. We have discovered that immobilized Ag nanoparticles supported on carbon exhibit enhanced Faradaic efficiency and a lower overpotential for selective reduction of CO2 to CO. These electrocatalysts were synthesized directly on the carbon support by a facile one-pot method using a cysteamine anchoring agent resulting in controlled monodispersed particle sizes. These synthesized Ag/C electrodes showed improved activities, specifically decrease of the overpotential by 300 mV at 1 mA/cm2, and 4-fold enhanced CO Faradaic efficiency at −0.75 V vs RHE with the optimal particle size of 5 nm compared to polycrystalline Ag foil. DFT calculations enlightened that the specific interaction between Ag nanoparticle and the anchoring agents modified the catalyst surface to have a selectively higher affinity to the intermediate COOH over CO, which effectivel...read more
Citations
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Towards Higher Rate Electrochemical CO2 Conversion: From Liquid-Phase to Gas-Phase Systems
TL;DR: In this article, a review aims to promote the further study of gas-phase systems for CO2 reduction, by generally examining some previous approaches from liquid phase to gas phase systems.
Journal ArticleDOI
Copper nanoparticle interspersed MoS2 nanoflowers with enhanced efficiency for CO2 electrochemical reduction to fuel.
TL;DR: The designed optimal hierarchical Cu/MoS2 composite electrocatalyst not only exhibited remarkably enhanced electronic conductivity and specific surface area but also possessed improved CO2 adsorption capacity, resulting in a significant increase in overall faradaic efficiency and a 7-fold augmentation of the farADAic efficiency of CH4 in comparison with bare MoS2.
Journal ArticleDOI
Rational design of carbon-based metal-free catalysts for electrochemical carbon dioxide reduction: A review
Song Liu,Song Liu,Song Liu,Hongbin Yang,Hongbin Yang,Xiong Su,Jie Ding,Qing Mao,Yanqiang Huang,Tao Zhang,Bin Liu +10 more
TL;DR: In this paper, some up-to-date strategies in improving the CO2 reduction reaction (CO2RR) performance on carbon-based metal-free materials (CMs) are summarized.
Journal ArticleDOI
Carbon nanotubes with rich pyridinic nitrogen for gas phase CO2 electroreduction
TL;DR: In this article, Nitrogen doped carbon nanotubes (NCNTs) with high concentration of pyridinic N sites (62.3% of all nitrogen) were prepared by pyrolysis of phenathroline heterocycle precursor, and they can reduce CO2 to CO with high selectivity and stability.
Journal ArticleDOI
Colloidal silver diphosphide (AgP 2 ) nanocrystals as low overpotential catalysts for CO 2 reduction to tunable syngas
Hui Li,Peng Wen,Dominique S. Itanze,Zachary D. Hood,Xiao Ma,Michael Kim,Shiba P. Adhikari,Chang Lu,Chaochao Dun,Miaofang Chi,Yejun Qiu,Scott M. Geyer +11 more
TL;DR: It is shown that AgP2 is a stable, selective and efficient syngas catalyst for solar-to-fuel conversion with a 3-fold lower overpotential compared to the benchmark Ag catalyst.
References
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