Highly active and durable core-shell electrocatalysts for proton exchange membrane fuel cells

Wu, Hsiwen1; Xiao, Fei1; Wang, Jing1,2; Gu, Meng2; Shao, Minhua1,3,4,5

2023-12-01

10.1007/s12274-023-6297-3

NANO RESEARCH   影响因子和分区

1998-0124

1998-0000

This work presents simple post-treatment methods to selectively and partially remove the Pd core of Pd-Pt core-shell (Pt@Pd/C) catalysts. The proton exchange membrane fuel cell with the post-treated Pt@Pd/C cathode (Pt loading: 0.10 mg center dot cm-2) delivers an impressive peak power density of 1.2 W center dot cm-2. The partial removal of Pd core endows an ultrahigh oxygen reduction reaction (ORR) mass activity of 0.32 A center dot mgPGM-1 when normalized to the platinum group metal (PGM) mass, or equivalently 0.55 A center dot mgPt-1 at 0.9 V measured in a fuel cell. The post-treatment thickens the Pt shells and mitigates the Pd dissolution during potential cycling. As a result, the post-treated core-shell catalyst demonstrates superior durability in ORR mass activity and polarization power density retention than untreated core-shell catalyst and benchmark Pt/C. In-situ inductively coupled plasma-mass spectrometry (ICP-MS) results highlight that the amount of dissolved Pd in post-treated core-shell catalyst is 17-times lower than that of the untreated one. Our findings highlight the importance of structural tuning of catalysts in enhancing their mass activity and durability.

core-shell catalyst platinum monolayer proton exchange membrane fuel cell oxygen reduction reaction durability

SCI ; EI

英语

通讯

National Key R&D Program of China[2022YFA1503900] ; Guangzhou Key Research and Development Program[202103040002] ; Green Tech Fund[GTF202020092] ; Guangdong Scientific Program[2019QN01L057]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:001113217000001

TSINGHUA UNIV PRESS

20234915170826

Catalyst activity ; Electrocatalysts ; Electrolytic reduction ; Inductively coupled plasma mass spectrometry ; Monolayers ; Oxygen ; Platinum ; Proton exchange membrane fuel cells (PEMFC) ; Shells (structures)

Structural Members and Shapes:408.2 ; Ore Treatment:533.1 ; Precious Metals:547.1 ; Fuel Cells:702.2 ; Chemistry:801 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

Web of Science

1.Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Clear Water Bay, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Hong Kong Univ Sci & Technol, Fok Ying Tung Res Inst, Guangzhou 511458, Peoples R China
4.Hong Kong Univ Sci & Technol, Energy Inst, Clear Water Bay, Hong Kong, Peoples R China
5.Hong Kong Univ Sci & Technol, Chinese Natl Engn Res Ctr Control & Treatment Heav, Clear Water Bay, Hong Kong, Peoples R China

Wu, Hsiwen,Xiao, Fei,Wang, Jing,et al. Highly active and durable core-shell electrocatalysts for proton exchange membrane fuel cells[J]. NANO RESEARCH,2023.

Wu, Hsiwen,Xiao, Fei,Wang, Jing,Gu, Meng,&Shao, Minhua.(2023).Highly active and durable core-shell electrocatalysts for proton exchange membrane fuel cells.NANO RESEARCH.

Wu, Hsiwen,et al."Highly active and durable core-shell electrocatalysts for proton exchange membrane fuel cells".NANO RESEARCH (2023).