Pt-Co nanoparticles anchored by ZrO2 for highly efficient and durable oxygen reduction reaction in H2-air fuel cells

被引：7

作者：

Huang, Meihua ^{[1
]}

Liu, Tao ^{[1
]}

Sun, Feng ^{[1
]}

Wu, Chuxin ^{[1
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, CAS Key Lab Design & Assembly Funct Nanostruct, Fujian Prov Key Lab Nanomat, Fuzhou 350108, Fujian, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2022年 / 47卷 / 54期

基金：

中国国家自然科学基金;

关键词：

Oxygen reduction reaction; Pt; Co; ZrO2; Interface; Proton exchange membrane fuel cells; PLATINUM NANOPARTICLES; ALLOY NANOCRYSTALS; ELECTROCATALYSTS; PERFORMANCE; INSTABILITY; COMPOSITES; DEPOSITION; CATALYSIS; SURFACE;

D O I：

10.1016/j.ijhydene.2022.05.111

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：

Synthesis of Pt-based catalysts with high activity and durability for oxygen reduction reaction (ORR) remains a very challenging task in the field of fuel cells. Here, Co-doped Pt nanoparticles (NP) with surface-defect ZrO2 are supported on the multi-walled carbon nanotubes (MWCNTs) (denoted as PteCo thorn ZrO2/MWCNTs). The PteCo thorn ZrO2/MWCNTs displays an ORR mass activity of 0.98 A mgPt(-1) at 0.9 V, which is 4.1-fold higher than that of the commercial Pt/C (0.238 A mgPt(-1)). Further durability test shows that the PteCo thorn ZrO2/ MWCNTs remains nearly unchanged ORR mass activity after 50000 accelerated durability testings (ADTs). Based on the mass performance and surface performance, the fuel cell with PteCo thorn ZrO2/MWCNTs cathode has far better power performance than that with commercial Pt/C. Moreover, the fuel cell with PteCo thorn ZrO2/MWCNTs cathode undergo only a 6.1% maximum power loss after 50000 ADTs. However, that with commercial Pt/C cathode after 30000 ADTs has 39.6% maxinum power loss. More impressively, compared to the 220 mV loss of Pt/C after 30000 ADTs, the PteCo thorn ZrO2/MWCNTs cathode also displays only 20 mV loss at 0.8 A/cm(2) after 50000 ADTs. The enhanced intrinsic activity of Pt eCo thorn ZrO2/MWCNTs may be attributed to the Co-doped Pt NPs and interface effect of Codoped Pt NPs and surface defect-rich ZrO2. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：22993 / 23005

页数：13

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