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Atomically Dispersed Fe-Co Bimetallic Catalysts for the Promoted Electroreduction of Carbon Dioxide

Nano-Micro Letters 2022年第2期14卷 79-93页

作者： Zhangsen Chen Gaixia Zhang Yuren Wen Ning Chen Weifeng Chen tom regier James Dynes Yi Zheng Shuhui Sun Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications VarennesQC J3X 1P7Canada School of Materials Science and Engineering University of Science and Technology100083 BeijingPeople’s Republic of China Canadian Light Source University of SaskatchewanSaskatoonSK S7N 2V3Canada Research Institute of Photocatalysis State Key Laboratory of Photocatalysis on Energy and EnvironmentFuzhou UniversityFuzhou 350116People’s Republic of China

The electroreduction reaction of CO_(2)(ECO_(2)RR)requires high-performance catalysts to convert CO_(2)into useful *** metal-based atomically dispersed catalysts are promising for the high selectivity and activity in ECO_(2)*** work presents a series of atomically dispersed Co,Fe bimetallic catalysts by carbonizing the Fe-introduced Co-zeolitic-imidazolate-framework(C-Fe-Co-ZIF)for the syngas generation from ECO_(2)*** synergistic effect of the bimetallic catalyst promotes CO *** to the pure C-Co-ZiF,C-Fe-Co-ZIF facilitates CO production with a CO Faradaic efficiency(FE)boost of 10%,with optimal FE_(CO)of 51.9%,FE_(H_(2))of 42.4%at-0.55 V,and CO current density of 8.0 mA cm^(-2)at-0.7 V versus reversible hydrogen electrode(RHE).The H_(2)/CO ratio is tunable from 0.8 to 4.2 in a wide potential window of-0.35 to-0.8 V versus *** total FE_(CO+H_(2))maintains as high as 93%over 10 *** proper adding amount of Fe could increase the number of active sites and create mild distortions for the nanoscopic environments of Co and Fe,which is essential for the enhancement of the CO production in ECO_(2)*** positive impacts of Cu-Co and Ni-Co bimetallic catalysts demonstrate the versatility and potential application of the bimetallic strategy for ECO_(2)RR.

关键词： CO_(2)reduction Electrocatalysis Syngas production Cobalt Iron Bimetallic catalysts

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Graphitic‐shell encapsulated FeNi alloy/nitride nanocrystals on biomass‐derived N‐doped carbon as an efficient electrocatalyst for rechargeable Zn‐air battery

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Carbon Energy 2021年第1期3卷 176-187页

作者： Mingjie Wu Gaixia Zhang Yongfeng Hu Jian Wang Tianxiao Sun tom regier Jinli Qiao Shuhui Sun Center for Energy Materials and TelecommunicationsInstitut National de la Recherche Scientifique(INRS)VarennesQuébecCanada Science Division Canadian Light SourceUniversity of SaskatchewanSaskatoonCanada Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghaiChina Shanghai Institute of Pollution Control and Ecological Security College of Environmental Science and EngineeringDonghua UniversityShanghaiChina

Oxygen reduction/evolution reactions(ORR/OERs)catalysts play a key role in the metal‐air battery and water‐splitting ***,we developed a facile template‐free method to fabricate a new type of non–noble metal‐based hybrid catalyst which consists of binary FeNi alloy/nitride nanocrystals with graphitic‐shell and biomass‐derived N‐doped carbon(NC)(FexNiyN@C/NC).This novel nanostructure exhibits superior performance for ORR/OER,which can be attributed to the strong interactions between the graphitic‐shell encapsulated FeNi alloy/nitride nanocrystals and the N‐doped porous carbon *** X‐ray absorption spectroscopy technique was employed to reveal the underlying mechanisms for the excellent *** assembled Zn‐air battery device exhibits outstanding charging/discharging performance and cycling stability,indicating the great potential of this type of novel catalysts.

关键词： binary FeNi alloy/nitride N‐doped carbon oxygen reduction and evolution reactions X‐ray absorption spectroscopy Zn‐air battery

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