Developing multi-functional and low-cost noble-metal-free catalysts such as transition metal phosphides(TMPs)to replace noble-metal is of practical significance for energy conversion and storage.However,the low-durability and the agglomeration phenomenon during the electrochemical process limit their prac-tical applications.Herein,using metal-organic frameworks(MOFs)as the precursor and a combined strategy of gradient temperature calcination and thermal phosphorization,a OD/2D heterostructure of NiCoFe-P quantum dots(QDs)anchored on porous carbon was successfully developed as highly efficient electrode materials for overall water splitting and supercapacitors.Owing to this distinctive OD/2D heterostructure and the synergistic effect of multi-metallic TMPs,the NiCoFe-P/C exhibits excellent elec-trocatalytic activity and durability of HER(87 mV at 10 mA cm-2)and OER(257 mV at 100 mA cm-2)in the KOH electrolyte.When NiCoFe-P/C is used as the two electrodes of electrolyzed water,only 1.55 V can drive the current density to 10 mA cm-2.At the same time,our NiCoFe-P/C possessed extraordinary prop-erty for charge storage.In particular,an ultra-high energy density of 100.8 Wh kg-1 was achieved at a power density of 900.0 W kg-1 for our assembled hybrid supercapacitor device NiCoFe-P/C(2:1)//acti-vated carbon(AC).This work may open a potential way for the design of OD/2D hybrid multi-functional nanomaterials based on TMPs QDs.

Ruiqi Liu;Xue-Rong Shi;Yi Wen;Xiaoxuan Shao;Chen Su;Jing Hu;Shusheng Xu

School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;School of Advanced Materials and Nanotechnology,Xidian University,Xi'an 710071,Shaanxi,China;School of Materials Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China

能源化学

[1]Ruiqi Liu;Xue-Rong Shi;Yi Wen;Xiaoxuan Shao;Chen Su;Jing Hu;Shusheng Xu-.Trimetallic synergistic optimization of OD NiCoFe-P QDs anchoring on 2D porous carbon for efficient electrocatalysis and high-energy supercapacitor)[J].能源化学,2022(11):149-158

Trimetallic,NiCoFe

synergistic,optimization,OD,QDs,anchoring,2D,porous,carbon,efficient,electrocatalysis,energy,Developing,multi,functional,low,cost,noble,free,catalysts,such,transition,phosphides,TMPs,replace,practical,significance,conversion,storage,However,durability,agglomeration,phenomenon,during,electrochemical,process,limit,their,applications,Herein,using,organic,frameworks,MOFs,precursor,combined,strategy,gradient,temperature,calcination,thermal,phosphorization,heterostructure,quantum,dots,anchored,was,successfully,developed,highly,overall,water,splitting,supercapacitors,Owing,this,distinctive,effect,exhibits,excellent,trocatalytic,activity,HER,mV,mA,OER,KOH,electrolyte,When,used,two,electrodes,electrolyzed,only,drive,current,density,At,same,our,possessed,extraordinary,prop,erty,charge,In,particular,ultra,achieved,power,assembled,hybrid,device,vated,AC,This,may,open,potential,way,design,nanomaterials

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