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A three-dimensional ordered honeycomb nanostructure anchored with Pt-N active sites via self-assembly of a block copolymer: an efficient electrocatalyst towards the oxygen reduction reaction in fuel cells

文献类型：期刊论文

作者Wang, Zhida1; Yang, Yi1,2; Wang, Xiaoman1; Lu, Zhuoxin1; Guo, Changqing1; Shi, Yan1; Tan, Hongyi1; Shen, Lisha1; Cao, Shuo3; Yan, Changfeng1,2
刊名JOURNAL OF MATERIALS CHEMISTRY A
出版日期2022-06-07
卷号10期号:22页码:12141-12149
ISSN号2050-7488
DOI10.1039/d2ta00752e
通讯作者Wang, Zhida(wangzd@ms.giec.ac.cn) ; Yan, Changfeng(yancf@ms.giec.ac.cn)
英文摘要Mesoporous Pt-containing nanocomposites with well-organized pores are desirable for fuel cells as well as sensors, electronics, and various chemical reactions. However, it remains challenging to construct three-dimensional (3D) ordered honeycomb-like (OHC) nanostructures with Pt species anchored in the mesopores. Herein, we show for the first time an in situ strategy of developing an N-doped ordered honeycomb (N-OHC) nanopattern with well-dispersed Pt-N-2 moieties by using the self-assembly of a block copolymer (BCP). The as-mentioned Pt including Pt single atoms (SAs) and Pt similar to 2.5 nm ultrafine nanoparticles (NPs) was hierarchically located on the inner walls and the outer surfaces of the N-OHC mesopores (Pt/N-OHC), forming well-dispersed Pt-N active sites and showing efficient catalytic activity towards the oxygen reduction reaction (ORR). By changing the film thickness of the pristine Pt/BCP template, double-layered Pt/N-OHC could be designed and the ORR activity could be correspondingly improved, for which a current density of 1.60 A cm(-2)@0.6 V and a peak power density of 1.07 W cm(-2) were observed at a very low Pt-loading of 0.04 mg cm(-2), better than 1.21 A cm(-2)@0.6 V and 0.79 W cm(-2) of the commercial Pt/C catalyst at a Pt-loading of 0.15 mg cm(-2). The electron donating behavior of Pt-N-2 and the pathway for O-2 reduction were investigated via the density functional theory (DFT) computation. The electron transfer from Pt to N gave rise to the formation of Pt-N covalent bonds, which resulted in a lower d band center and a weaker O adsorption energy and endowed the Pt/N-OHCs with enhanced ORR activity.
WOS关键词PLATINUM NANOPARTICLES ; DOPED GRAPHENE ; OXIDATION ; CO ; FE
资助项目STS Regional Key Project of the Chinese Academy of Sciences[KFJ-STS-QYZD-2021-02-003] ; Guangzhou Science and Technology Plan Project[201904010412] ; Guangzhou Science and Technology Plan Project[202002030349] ; Guangzhou Science and Technology Plan Project[202103040002]
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
语种英语
出版者ROYAL SOC CHEMISTRY
WOS记录号WOS:000798865000001
资助机构STS Regional Key Project of the Chinese Academy of Sciences ; Guangzhou Science and Technology Plan Project
源URL[http://ir.giec.ac.cn/handle/344007/36506]  
专题中国科学院广州能源研究所
通讯作者Wang, Zhida; Yan, Changfeng
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Zhida,Yang, Yi,Wang, Xiaoman,et al. A three-dimensional ordered honeycomb nanostructure anchored with Pt-N active sites via self-assembly of a block copolymer: an efficient electrocatalyst towards the oxygen reduction reaction in fuel cells[J]. JOURNAL OF MATERIALS CHEMISTRY A,2022,10(22):12141-12149.
APA Wang, Zhida.,Yang, Yi.,Wang, Xiaoman.,Lu, Zhuoxin.,Guo, Changqing.,...&Yan, Changfeng.(2022).A three-dimensional ordered honeycomb nanostructure anchored with Pt-N active sites via self-assembly of a block copolymer: an efficient electrocatalyst towards the oxygen reduction reaction in fuel cells.JOURNAL OF MATERIALS CHEMISTRY A,10(22),12141-12149.
MLA Wang, Zhida,et al."A three-dimensional ordered honeycomb nanostructure anchored with Pt-N active sites via self-assembly of a block copolymer: an efficient electrocatalyst towards the oxygen reduction reaction in fuel cells".JOURNAL OF MATERIALS CHEMISTRY A 10.22(2022):12141-12149.

入库方式： OAI收割

来源：广州能源研究所

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