Core-Shell Nanostructured Au@NimPt2 Electrocatalysts with Enhanced Activity and Durability for Oxygen Reduction Reaction
文献类型：期刊论文
| 作者 | Shen, Liu-Liu2; Zhang, Gui-Rong2; Miao, Shu1; Liu, Jingyue (Jimmy)1,3; Xu, Bo-Qing2 |
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2016-03-01 |
| 卷号 | 6期号:3页码:1680-1690 |
| 关键词 | Electrocatalyst Multimetallic Nanoparticles Solvothermal Synthesis Core-shell Nanostructure Oxygen Reduction Reaction Catalyst Design Electrochemical Treatment |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.5b02124 |
| 文献子类 | Article |
| 英文摘要 | Fabricating Pt-alloy and core-shell nanostructures with Au NPs in the cores are considered as two general approaches to improving the performance of Pt-based catalysts for the cathodic oxygen reduction reaction (ORR) in acidic electrolyte. These two approaches are combined herein to develop a heteroseed-mediated solvothermal method for synthesizing nearly monodisperse core-shell structured Au@NimPt2 nanoparticles (NPs) of 5.0-6.5 nm (with the atomic ratio of Ni/Pt/Au = m/2/1) as ORR catalysts. With respect to controlling the amount and relative concentrations of the metal precursors in the starting solution, this method enables not only facile manipulation of the shell composition and thickness but also fine-tuning of the core-shell interaction and surface electronic structures of the resultant Au@NimPt2 NPs, endowing the Au@NimPt2 NPs with improved Pt activity and durability for ORR. Subjecting the Au@NimPt2 NPs to an ex situ pretreatment in flowing 2%CO/Ar at 300 degrees C is shown to result in further improved Pt activity. Data are also presented to correlate the intrinsic Pt activity with experimentally determined CO adsorption property (CO-stripping peak potential) of Pt for the Au@Ni(m)Pt2 samples, and to show the excellent electrochemical durability of the Au@NimPt2 NPs during 20 000 potential cycles between 0.6 and 1.1 V (vs RI-IE) in O-2-saturated 0.1 M HClO4. Compared with the commercial E-TEK Pt/C catalyst, the most-active Au@Ni2Pt2 NPs exhibit 3-4- and 4-6-fold higher Pt activity at 0.9 V before and after the 20 000 potential cycles, respectively. Factors relevant to the activity and durability control of the Au@NimPt2 catalysts for ORR are discussed. |
| WOS关键词 | GOLD NANOPARTICLES ; PTXNI1-X NANOPARTICLES ; SEGREGATION PHENOMENA ; SURFACE SEGREGATION ; STABILITY ; OXIDATION ; NI ; NANOCRYSTALS ; CATALYSTS ; ELECTROREDUCTION |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000371755500036 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/171074]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Xu, Bo-Qing |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Tsinghua Univ, Innovat Catalysis Program, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China 3.Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA |
| 推荐引用方式 GB/T 7714 | Shen, Liu-Liu,Zhang, Gui-Rong,Miao, Shu,et al. Core-Shell Nanostructured Au@NimPt2 Electrocatalysts with Enhanced Activity and Durability for Oxygen Reduction Reaction[J]. ACS CATALYSIS,2016,6(3):1680-1690. |
| APA | Shen, Liu-Liu,Zhang, Gui-Rong,Miao, Shu,Liu, Jingyue ,&Xu, Bo-Qing.(2016).Core-Shell Nanostructured Au@NimPt2 Electrocatalysts with Enhanced Activity and Durability for Oxygen Reduction Reaction.ACS CATALYSIS,6(3),1680-1690. |
| MLA | Shen, Liu-Liu,et al."Core-Shell Nanostructured Au@NimPt2 Electrocatalysts with Enhanced Activity and Durability for Oxygen Reduction Reaction".ACS CATALYSIS 6.3(2016):1680-1690. |
入库方式： OAI收割
来源：大连化学物理研究所
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