Instant formation of excellent oxygen evolution catalyst film via controlled spray pyrolysis for electrocatalytic and photoelectrochemical water splitting  

作　　者：Na An Hengzheng Tian Yang Zhou Yalong Zou Hao Xiu Yufeng Cao Ying Wang Jianming Li Deyu Liu Yongbo Kuang 

机构地区：[1]School of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,Zhejiang,China [2]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,Zhejiang,China [3]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100000,China [4]Petroleum Geology Research and Laboratory Center,Research Institute of Petroleum Exploration&Development(RIPED),PetroChina,Beijing 100083,China

出　　处：《Journal of Energy Chemistry》2022年第3期657-665,I0018,共10页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(NSFC,21805298,21905288,51904288);the Zhejiang Provincial Natural Science Foundation(Z21B030017);the K.C.Wong Education Foundation(GJTD-201913);the Ningbo major special projects of the Plan‘‘Science and Technology Innovation 2025”(2018B10056,2019B10046);the Ningbo 3315 Program。

摘　　要：The retarded kinetics of oxygen evolution on electrodes is a bottleneck for electrochemical energy conversion and storage systems.NiFe-based electrocatalysts provide a cost-effective choice to confront this challenge.However,there is a lack of facile techniques for depositing compact catalytic films of high coverage and possessing a state-of-the-art performance,which is especially desired in photoelectrochemical(PEC)systems.Herein,we demonstrate a spray pyrolysis(SP)route to address this issue,featuring the kinetic selective preparation towards the desired catalytic-active material.Differing from reported SP protocols which only produce inactive oxides,this approach directly generates a unique composite film consisting of NiFe layered oxyhydroxides and amorphous oxides,exhibiting an overpotential as small as 255 mV(10 mA cm^(−2))and a turnover frequency of∼0.4 s^(−1)per metal atom.By using such a facile protocol,the surface rate-limiting issue of BiVO_(4)photoanodes can be effectively resolved,resulting in a charge injection efficiency of over 90%.Considering this deposition directly start from simple nitrates but only takes several seconds to complete,we believe it can be developed as a widely applicable and welcomed functionalization technique for diverse electrochemical devices.

关 键 词：Spray pyrolysis Oxygen evolution catalysts Layered oxyhydroxide Heterogeneous structure Thin film 

分 类 号：TQ426[化学工程] TB383.2[一般工业技术—材料科学与工程] TQ116.2