Hollow Metal Nanocrystals with Ultrathin, Porous Walls and Well-Controlled Surface Structures

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

81 Scopus Citations
View graph of relations

Author(s)

  • Ming Zhao
  • Xuan Yang
  • Kyle D. Gilroy
  • Dong Qin
  • Younan Xia

Detail(s)

Original languageEnglish
Article number1801956
Journal / PublicationAdvanced Materials
Volume30
Issue number48
Publication statusPublished - 28 Nov 2018
Externally publishedYes

Abstract

Recent developments of a novel class of catalytic materials built on hollow nanocrystals having ultrathin, porous walls, and well-controlled surface structures are discussed, with a focus on platinum and the oxygen reduction reaction (ORR). An introduction is given to the critical role of platinum in the proton exchange membrane fuel cells, and the pressing need to develop a strategy for achieving cost-effective and sustainable use of this precious metal. How to maximize the mass activity of ORR catalysts based on platinum by rationally engineering the surface structure while increasing the utilization efficiency of atoms is then discussed. After reporting on the synthetic methods involving galvanic replacement and seed-mediated growth followed by etching, respectively, a number of examples to demonstrate the enhancement in activity and durability for this new class of catalytic materials are showcased. The feasibility to have the methodology extended from platinum to other precious metals such as gold and ruthenium is highlighted. In conclusion, some of the remaining issues and emerging solutions are examined.

Research Area(s)

  • catalysts, fuel cells, hollow nanocrystals, nanocages, oxygen reduction reaction

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Hollow Metal Nanocrystals with Ultrathin, Porous Walls and Well-Controlled Surface Structures. / Zhao, Ming; Wang, Xue; Yang, Xuan et al.
In: Advanced Materials, Vol. 30, No. 48, 1801956, 28.11.2018.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review