The Quasi-Pt-Allotrope Catalyst: Hollow PtCo@single-Atom Pt1 on Nitrogen-Doped Carbon toward Superior Oxygen Reduction

被引:110
作者
Lai, Wei-Hong [1 ]
Zhang, Bin-Wei [1 ]
Hu, Zhenpeng [2 ]
Qu, Xi-Ming [3 ]
Jiang, Yan-Xia [3 ]
Wang, Yun-Xiao [1 ]
Wang, Jia-Zhao [1 ]
Liu, Hua Kun [1 ]
Chou, Shu-Lei [1 ]
机构
[1] Univ Wollongong, Inst Superconducting & Elect Mat, Innovat Campus, Wollongong, NSW 2500, Australia
[2] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
[3] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
基金
澳大利亚研究理事会;
关键词
hollow bimetallic PtCo alloy; oxygen reduction reaction (ORR); single Pt atoms; ZIF-67-derived carbon; NANOPARTICLES; NANOCRYSTALS; PLATINUM; MODEL; SIZE;
D O I
10.1002/adfm.201807340
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Single-atom Pt and bimetallic Pt3Co are considered the most promising oxygen reduction reaction (ORR) catalysts, with a much lower price than pure Pt. The combination of single-atom Pt and bimetallic Pt3Co in a highly active nanomaterial, however, is challenging and vulnerable to agglomeration under realistic reaction conditions, leading to a rapid fall in the ORR. Here, a sustainable quasi-Pt-allotrope catalyst, composed of hollow Pt3Co (H-PtCo) alloy cores and N-doped carbon anchoring single atom Pt shells (Pt1N-C), is constructed. This unique nanoarchitecture enables the inner and exterior spaces to be easily accessible, exposing an extra-high active surface area and active sites for the penetration of both aqueous and organic electrolytes. Moreover, the novel Pt1N-C shells not only effectively protect the H-PtCo cores from agglomeration but also increase the efficiency of the ORR in virtue of the isolated Pt atoms. Thus, the H-PtCo@Pt1N-C catalyst exhibits stable ORR without any fade over a prolonged 10000 cycle test at 0.9 V in HClO4 solution. Furthermore, this material can offer efficient and stable ORR activities in various organic electrolytes, indicating its great potential for next-generation lithium-air batteries as well.
引用
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页数:10
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