Promoting electrocatalytic methanol oxidation of platinum nanoparticles by cerium modification

被引：72
|
作者：
Chen, Ligang [1 ]
Liang, Xin [1 ]
Li, Xiaotong [1 ]
Pei, Jiajing [1 ]
Lin, He [3 ]
Jia, Dianzeng [3 ]
Chen, Wenxing [4 ]
Wang, Dingsheng [2 ]
Li, Yadong [2 ]
机构：
[1] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
[2] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
[3] Xinjiang Univ, Inst Appl Chem, Key Lab Adv Funct Mat Autonomous Reg, Key Lab Energy Mat Chem,Minist Educ, Urumqi 830046, Peoples R China
[4] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Construct Tailorable Adv Funct Ma, Beijing 100081, Peoples R China
来源：
NANO ENERGY | 2020年 / 73卷
基金：
中国国家自然科学基金;
关键词：
Platinum nanoparticle; Cerium oxygenated species; Modification; Methanol oxidation reaction; Electrocatalysis; OXYGEN REDUCTION; EXCELLENT ELECTROCATALYSTS; SURFACE LATTICE; EFFICIENT; CATALYSTS; ANODE; ALLOY; INTERFACE; NANOWIRES; SITES;
D O I：
10.1016/j.nanoen.2020.104784
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 improvement of performance for Pt-based electrocatalysts is of significant importance. Here we synthesized a Ce-modified Pt nanoparticle (NP) with Cerium (III) oxygenated species (1 wt% Ce content) anchored on Pt NPs for methanol oxidation reaction (MOR). High-angle annular dark field-scanning transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray absorption fine structure spectroscopy were combined to prove and analyze this special structure. Surprisingly, the electrocatalytic activity of the Ce-modified Pt NPs for MOR reached 1470 mA/mg- Pt and 8670 mA/mg- Pt in acidic and alkaline media, respectively, which were superior to those of the Pt NPs/C and commercial Pt/C. Density functional calculations showed that the structure of Pt surface was deformed by the modification of Cerium, which made CO* + OH* bind more strongly, and the stronger anchoring of OH* induced the easier removal of CO* in the potential determining step. This work would provide an effective strategy to develop efficient MOR electrocatalysts.
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页数：7
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