Ultrafast Preparation of Nonequilibrium FeNi Spinels by Magnetic Induction Heating for Unprecedented Oxygen Evolution Electrocatalysis  

作　　者：Bingzhang Lu Qiming Liu Chunyang Wang Zaheer Masood David J.Morris Forrest Nichols Rene Mercado Peng Zhang Qingfeng Ge Huolin L.Xin Shaowei Chen 

机构地区：[1]Department of Chemistry and Biochemistry,University of California,1156 High Stret,Santa Cruz,California 95064,USA [2]Department of Physics and Astronomy,University of California,Irvine,California 92697,USA [3]Department of Chemistry and Biochemistry,Southern Ilinois University,Carbondale,Ilinois 62901,USA [4]Department of Chemistry,Dalhousie University,6274 Coburg Road,Halifax,NS,Canada B3H 4R2

出　　处：《Research》2022年第4期165-177,共13页研究（英文）

基　　金：This work was supported by grants from the National Science Foundation(CHE-1900235 and CHE-2003685,S.W.C.and CHE-1900401,H.L.X.);Part of the TEM and XPS work was carried out at the National Center for Electron Microscopy and Molecular Foundry,Lawrence Berkeley National Laboratory,which is supported by the Office of Science,Office of Basic Energy Sciences,of U.S.Department of Energy under Contract No.DE-AC02-05CH11231,as part of a user project.The XAS work used resources of the Advanced Photon Source,a User Facility operated for the U.S.Department of Energy(DOE)Office of Science by Argonne National Laboratory and was supported by the DOE under contract No.DE-AC02-06CH11357 and the Canadian Light Source and its funding partners;This research also used resources of the Center for Functional Nanomaterials(CFN),which is a U.S.Department of Energy Office of Science User Facility,at Brookhaven National Laboratory under Contract No.DE-SC0012704;The authors also thank Mr.Jeremy Barnett for the assistance in sample preparation and data acquisition of X-ray diffraction measurements in the UCSC X-ray Facility which was funded by the National Science Foundation(MRI-1126845).

摘　　要：Carbon-supported nanocomposites are attracting particular attention as high-performance,low-cost electrocatalysts for electrochemical water splitting.These are mostly prepared by pyrolysis and hydrothermal procedures that are time-consuming(from hours to days)and typically difficult to produce a nonequilibrium phase.Herein,for the first time ever,we exploit magnetic induction heating-quenching for ultrafast production of carbon-FeNi spinel oxide nanocomposites(within seconds),which exhibit an unprecedentedly high performance towards oxygen evolution reaction(OER),with an ultralow overpotential of only+260 mV to reach the high current density of 100 mA cm^(-2).Experimental and theoretical studies show that the rapid heating and quenching process(ca.10^(3)K s^(-1))impedes the Ni and Fe phase segregation and produces a Cl-rich surface,both contributing to the remarkable catalytic activity.Results from this study highlight the unique advantage of ultrafast heating/quenching in the structural engineering of functional nanocomposites to achieve high electrocatalytic performance towards important electrochemical reactions.

关 键 词：QUENCHING OXYGEN attracting 

分 类 号：O643.3[理学—物理化学]