Tuning electronic correlations of ultra-small IrO2 nanoparticles with La and Pt for enhanced oxygen evolution performance and long-durable stability in acidic media

被引：75
作者：
Hao, Shaoyun [1 ]
Wang, Yahui [1 ]
Zheng, Guokui [1 ]
Qiu, Lingshu [1 ]
Xu, Nan [1 ]
He, Yi [1 ]
Lei, Lecheng [1 ,2 ]
Zhang, Xingwang [1 ,2 ]
机构：
[1] Zhejiang Univ, Coll Chem & Biol Engn, Minist Educ, Key Lab Biomass Chem Engn, Hangzhou 310027, Zhejiang, Peoples R China
[2] Inst Zhejiang Univ Quzhou, 78 Jiuhua Blvd North, Quzhou 324000, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 266卷
关键词：
Acidic media; Electronic structure; IrO2; Oxygen evolution reaction; Theoretical calculations; DOUBLE PEROVSKITES; NANOSHEET ARRAYS; HIGHLY EFFICIENT; FACILE SYNTHESIS; WATER; IRIDIUM; ELECTROCATALYST; MECHANISM; SHELL; NI;
D O I：
10.1016/j.apcatb.2020.118643
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The rational design of electrocatalysts with active and long-durable characters applying in acidic proton exchange membrane electrolyzers is a spotlight for the sustainable energy storage. With the aim of tuning electronic structure of electrocatalysts and altering potential limiting step of the oxygen evolution reaction (OER), the ultra-small Pt, La co-doped IrO2 nanoparticles with average size of 2 nm highly dispersed on N-doped carbon (NC) was designed. Impressively, the representative Pt0.1La0.1-IrO2@NC exhibited the record performance toward OER in 0.5 M H2SO4 with a low overpotential of 205 mV (10 mA.cm(-2)), an extremely excellent stability of 135 h, and a fairly high TOF value of 5.71 s(-1) at eta = 280 mV. Theoretical calculations revealed that the co-doping of Pt, La into the lattice of IrO2 could rationally tune d band centers and lower the energy barrier for the potential-determining step (from *O to *OOH) toward OER.
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页数：8
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