Sub-3 nm Pt@Ru toward Outstanding Hydrogen Oxidation Reaction Performance in Alkaline Media

Yang，Fei1,2,3; Wang，Yian2; Cui，Yingdan2; Yang，Xuming4; Zhu，Yuanmin5; Weiss，Catherine M.6; Li，Menghao3; Chen，Guangyu7; Yan，Yushan6; Gu，M. Danny1,3; Shao，Minhua2,7,8

2023-12-20

10.1021/jacs.3c08908

Journal of the American Chemical Society   影响因子和分区

0002-7863

1520-5126

Anion-exchange membrane fuel cells (AEMFCs) are promising alternative hydrogen conversion devices. However, the sluggish kinetics of the hydrogen oxidation reaction in alkaline media hinders further development of AEMFCs. As a synthesis method commonly used to prepare disordered PtRu alloys, the impregnation process is ingeniously designed herein to synthesize sub-3 nm Pt@Ru core-shell nanoparticles by sequentially reducing Pt and Ru at different annealing temperatures. This method avoids complex procedures and synthesis conditions for organic synthesis systems, and the atomic structure evolution of the synthesized core-shell nanoparticles can be tracked. The synthesized Pt@Ru electrocatalyst shows an ultrasmall average size of ∼2.5 nm and thereby a large electrochemical surface area (ECSA) of 166.66 m g. Exchange current densities (j) normalized to the mass (Pt + Ru) and ECSA of this electrocatalyst are 8.0 and 5.8 times as high as those of commercial Pt/C, respectively. To the best of our knowledge, the achieved mass-normalized j measured by rotating disk electrodes is the highest reported so far. The membrane electrode assembly test of the Pt@Ru electrocatalyst shows a peak power density of 1.78 W cm (0.152 mg cm), which is higher than that of commercial PtRu/C (1.62 W cm, 0.211 mg cm). The improvement of the intrinsic activity can be attributed to the electron transfer from the Ru shell to the Pt core, and the ultrafine particles further enhance the mass activity. This work reveals the feasibility of using simple impregnation to synthesize fine core-shell nanocatalysts and the importance of investigating the atomic structure of PtRu nanoparticles and other disordered alloys.

EI ; SCI

英语

NI论文

通讯

20235115246211

Alkaline fuel cells ; Binary alloys ; Core shell nanoparticles ; Electrocatalysts ; Hydrogen ; Impregnation ; Ion exchange membranes ; Nanocatalysts ; Platinum ; Reaction kinetics ; Rotating disks ; Shells (structures) ; Synthesis (chemical)

Structural Members and Shapes:408.2 ; Precious Metals:547.1 ; Machine Components:601.2 ; Fuel Cells:702.2 ; Nanotechnology:761 ; Chemical Plants and Equipment:802.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Materials Science:951

2-s2.0-85180110747

Scopus

1.Eastern Institute for Advanced Study,Eastern Institute of Technology,Ningbo,Zhejiang,315200,China
2.Department of Chemical and Biological Engineering,The Hong Kong University of Science and Technology,Kowloon,Clear Water Bay,999077,Hong Kong
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.Graphene Composite Research Center,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen,518060,China
5.Research Institute of Interdisciplinary Science,School of Materials Science and Engineering,Dongguan University of Technology,Dongguan,523808,China
6.Department of Chemical and Biomolecular Engineering,University of Delaware,Newark,19716,United States
7.Fok Ying Tung Research Institute,The Hong Kong University of Science and Technology,Guangzhou,511458,China
8.Energy Institute,and Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution,The Hong Kong University of Science and Technology,Kowloon,Clear Water Bay,999077,Hong Kong

Yang，Fei,Wang，Yian,Cui，Yingdan,et al. Sub-3 nm Pt@Ru toward Outstanding Hydrogen Oxidation Reaction Performance in Alkaline Media[J]. Journal of the American Chemical Society,2023,145(50):27500-27511.

Yang，Fei.,Wang，Yian.,Cui，Yingdan.,Yang，Xuming.,Zhu，Yuanmin.,...&Shao，Minhua.(2023).Sub-3 nm Pt@Ru toward Outstanding Hydrogen Oxidation Reaction Performance in Alkaline Media.Journal of the American Chemical Society,145(50),27500-27511.

Yang，Fei,et al."Sub-3 nm Pt@Ru toward Outstanding Hydrogen Oxidation Reaction Performance in Alkaline Media".Journal of the American Chemical Society 145.50(2023):27500-27511.