首页|Boosting the catalytic activity toward oxygen reduction via a heterostructure of porous iron oxide-decorated 2D NiO/NG nanosheets

Boosting the catalytic activity toward oxygen reduction via a heterostructure of porous iron oxide-decorated 2D NiO/NG nanosheets

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
As a noble metal substitute,two-dimensional(2D)hierarchical nano-frame structures have attracted great interest as candidate catalysts due to their remarkable advantages-high intrinsic activity,high electron mobility,and straightforward surface functionalization.Therefore,they may replace Pt-based catalysts in oxygen reduction reaction(ORR)applications.Herein,a simple method is developed to design hierarchical nano-frame structures assembled via 2D NiO and N-doped graphene(NG)nanosheets.This procedure can yield nanostructures that satisfy the criteria correlated with improved electrocatalytic per-formance,such as large surface area,numerous undercoordinated atoms,and high defect densities.Further,porous NG nanosheet architectures,featuring NiO nanosheets densely coordinated with accessi-ble holey Fe2O3 moieties,can enhance mesoporosity and balance hydrophilicity.Such improvements can facilitate charge transport and expose formerly inaccessible reaction sites,maximizing active site density utilization.Density functional theory(DFT)calculations reveal favored O2 adsorption and dissociation on Fe2O3 hybrid structures when supported by 2D NiO and NG nanomaterials,given 2D materials donated charge to Fe2O3 active sites.Our systematic studies reveal that synergistic contributions are responsible for enriching the catalytic activity of Fe2O3@NiO/NG in alkaline media-encompassing internal voids and pores,unique hierarchical support structures,and concentrated N-dopant and bimetallic atomic interac-tions.Ultimately,this work expands the toolbox for designing and synthesizing highly efficient 2D/2D shelled functional nanomaterials with transition metals,endeavoring to benefit energy conversion and related ORR applications.

N-doped grapheneHoley Fe2O3 nanocrystalsNiO nanosheetsHigh catalytic performance,ORR

Kakali Maiti、Matthew T.Curnan、Hyung Jun Kim、Kyeounghak Kim、Jeong Woo Han

展开 >

Department of Chemical Engineering Pohang University of Science and Technology(POSTECH),Pohang,Gyeongbuk 37673,Republic of Korea

CSIR-Institute of Minerals and Materials Technology,RRL Campus,Acharya Vihar,Bhubaneswar,Odisha 751013,India

Department of Materials Science and Engineering,Research Institute of Advanced Materials,Seoul National University,Seoul 08826,Republic of Korea

Department of Chemical Engineering,Clean-Energy Research Institute,Hanyang University,Seoul 04763,Republic of Korea

展开 >

National Research Foundation of Korea(NRF)funded by Ministry of Science and ICT(MSIT)ERC Center

RS-2023-002355962022R1A5A1033719

2024

10.1016/j.jechem.2024.01.051

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.93(6)
  • 61