Nano-engineered catalysts for high-performance oxygen reduction reaction  

作　　者：Kunsong Hu Yulong Zhang Jiayi Zhu Jinhua Mai Gang Liu Manoj Krishna Sugumar Xinhua Liu Feng Zhan Rui Tan 

机构地区：[1]School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China [2]Energy Innovation Centre,Warwick Manufacture Group,University of Warwick,Coventry CV47AL,United Kingdom [3]School of Transportation Science and Engineering,Beihang University,Beijing 100191,China [4]IDTECH(Suzhou)Co.,Ltd.,Suzhou 215217,China [5]College of Mechatronical and Electrical Engineering,Hebei Agricultural University,Baoding 071001,China

出　　处：《Chinese Chemical Letters》2024年第10期510-516,共7页中国化学快报（英文版）

基　　金：the support from Warwick Manufacturing Group at the University of Warwick;CITIC Dameng Mining Industries Limited-Guangxi University Joint Research Institute of Manganese Resources Utilization and Advanced Materials Technology;Guangxi University-CITIC Dameng Mining Industries Limited Joint base of Postgraduate Cultivation;State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures;National Natural Science Foundation of China(Nos.11364003 and 52102470);Guangxi Innovation Driven Development Project(Nos.AA17204100 and AA18118052);the Natural Science Foundation of Guangxi Province(No.2018GXNSFAA138186)。

摘　　要：The efficient energy conversion of fuel cells is greatly constrained by the slow oxygen reduction reac tion(ORR)kinetics,which necessitates the use of highly active metal catalysts such as platinum(Pt).The critical challenge limiting large-scale usage of Pt is the capital cost that can be addressed through a pro totypical approach by embedding metal nanoparticles(NPs),e.g.,Pt NPs,in the conductive framework However,previously reported embedding approaches are sophisticated and suffer from limited yields leading to higher chemical process costs and remaining distant from commercial viability.Here,we re port a facile,cost-effective and time-efficient structural tuning approach to synthesizing ultrafine Pt NP impregnated within a conductive and highly porous carbon framework via a microwave-assisted polyo reduction method.Pt NPs with a uniform size of~2.27 nm can be successfully integrated within the pore of the carbon framework,enabling homogeneous dispersion.Benefiting from these highly dispersed and ultrafine Pt NPs,the electrochemical surface area(ECSA)is improved to 142.98 m^(2)/gPt,2.25 times highe than that of the commercial counterpart(63.52 m^(2)/gPt).Furthermore,our structurally optimized catalys composite features a remarkably catalytic activity with a high half-wave potential(E_(1/2))of 0.895 V and an improved mass activity(MA)of 0.2289 A/mgPt,2.39-fold improvement compared to the commercia counterpart.In addition,orthogonal experiments were designed to identify the key process parameter for fabricating Pt/C catalysts,offering insights for scaled-up and industrial production.

关 键 词：Fuel cells Oxygenreductionreaction Structural engineering Microwave method Ultrafine nanoparticles 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ426[化学工程]