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Upcycling PET in parallel with energy-saving H_(2)production via bifunctional nickel-cobalt nitride nanosheets

作     者:Xuan Liu Zhongying Fang Dengke Xiong Shuaiqi Gong Yanli Niu Wei Chen Zuofeng Chen Xuan Liu;Zhongying Fang;Dengke Xiong;Shuaiqi Gong;Yanli Niu;Wei Chen;Zuofeng Chen

作者机构:Shanghai Key Lab of Chemical Assessment and SustainabilitySchool of Chemical Science and EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China 

出 版 物:《Nano Research》 (纳米研究(英文版))

年 卷 期:2023年第16卷第4期

页      面:4625-4633页

核心收录:

学科分类:081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程(可授工学、理学学位)] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基  金:supported by the National Natural Science Foundation of China(Nos.22072107 and 21872105) the Science&Technology Commission of Shanghai Municipality(No.19DZ2271500) the Fundamental Research Funds for the Central Universities. 

主  题:nickel-cobalt nitride hydrogen evolution reaction polyethylene terephthalate upcycling ethylene glycol oxidation formic acid 

摘      要:We describe here an electro-reforming strategy to upcycle polyethylene terephthalate(PET)waste with simultaneous hydrogen production by a bifunctional nickel-cobalt nitride nanosheets electrocatalyst.PET plastics are digested in alkaline solution giving an electrochemically active monomer ethylene glycol(EG).The introduction of Co in Co-Ni3N/carbon cloth(CC)promotes the redox behavior of Ni2+/Ni3+,which is beneficial for EG oxidation at an ultra-low potential(1.15 V vs.reversible hydrogen electrode(RHE))and breaks through the limitation of high catalytic potentials of simple Ni-based electrocatalysts(1.30 V).In PET hydrolysate with Co-Ni3N/CC couples,an integrated EG oxidation-hydrogen production system achieves a current density of 50 mA·cm^(−2)at a cell voltage of 1.46 V,which is 370 mV lower than the conventional water splitting.The in-situ Raman and Fourier transform infrared(FTIR)spectroscopies and density functional theory(DFT)calculations identify the catalytic mechanism and point to advantages of heterostructure engineering in optimizing adsorption energies and promoting catalytic activities for EG oxidation.

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