Engineering ultrathin PdCu nanosheets-composed nanoflowers with high catalytic activity for oxygen reduction reaction

被引：0

作者：

Liu W. ^{[1
]}

Zhang C. ^{[1
]}

Chen C. ^{[1
]}

Ni P. ^{[1
]}

Jiang Y. ^{[1
]}

Wang B. ^{[1
]}

Lu Y. ^{[1
]}

机构：

[1] School of Materials Science and Engineering, University of Jinan, Jinan

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 11期

关键词：

Catalyst; Electrochemistry; Fuel cells; Nanomaterials; Oxygen reduction reaction; PdCu;

D O I：

10.16085/j.issn.1000-6613.2020-2265

中图分类号：

学科分类号：

摘要：

Rationally controlling the composition of electrocatalysts at the atomic level is proved to be an effective way to improve their catalytic performance towards oxygen reduction reaction (ORR). Here, PdCu ultrathin nanosheets-composed three-dimensional (3D) nanoflowers (Pd1Cux NCFs) with different compositions were prepared by a facile one-pot solvothermal reduction. The morphology, crystal structure and composition of catalysts were characterized by TEM,STEM-EDS,XRD,XPS,etc. Compared with traditional two-dimensional nanomaterials, their abundant routes for fast mass transport, high Pd atom utilization efficiency as well as the synergistic effect of PdCu bimetal endowed Pd1Cux NCFs with enhanced ORR performance under alkaline condition. In addition, the effect of the dosage of Pd and Cu precursors on the ORR performance was studied. Electrochemical measurement results indicated that the optimal catalyst (Pd1Cu0.5 NCFs, the molar ratio of Pd/Cu precursor was 1:0.5) exhibited the best ORR performance. A half-wave potential (E1/2) of 0.937V in alkaline medium was obtained, which was higher than that of commercial Pt/C (0.851V). Electrochemical accelerated durability test results showed that the Pd1Cu0.5 NCFs could endure at least 1000 cycles with negligible activity decay, suggesting their excellent stability. At 0.90V, the mass activity of Pd1Cu0.5NCFs could achieve 1.09A/mg, which was 14.5 times higher than that of commercial Pt/C. © 2021, Chemical Industry Press Co., Ltd. All right reserved.

引用

页码：6246 / 6253

页数：7

共 41 条

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