4.8 Article

Symmetry Breaking in Monometallic Nanocrystals toward Broadband and Direct Electron Transfer Enhanced Plasmonic Photocatalysis

Journal

ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 3, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202006738

Keywords

gold; photocatalysis; plasmonic; symmetry breaking; underpotential deposition

Funding

  1. National Natural Science Foundation of China [21905247]
  2. Zhejiang Provincial Natural Science Foundation of China [LR18B030003]
  3. Thousand Talents Program for Distinguished Young Scholars

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Metallic nanocrystals show potential for applications in plasmon-enhanced photocatalysis and solar energy harvesting, and a cooperative deposition strategy can enhance their activity and efficiency.
Metallic nanocrystals manifest themselves as fascinating light absorbers for applications in plasmon-enhanced photocatalysis and solar energy harvesting. The essential challenges lie in harvesting the full-spectrum solar light and harnessing the plasmon-induced hot carriers at the metal-acceptor interface. To this end, a cooperative overpotential and underpotential deposition strategy is proposed to mitigate both the challenges. Specifically, by utilizing both ionic additive and thiol passivator to introduce symmetry-breaking growth over gold icosahedral nanocrystals, the microscopic origin can be attributed to the site-specific nucleation of stacking faults and dislocations. By adopting asymmetric crystal shape and unique surface facets, such nanocrystals attain high activity toward photocatalytic ammonia borane hydrolysis, arising from combined broadband plasmonic properties and enhanced direct transfer of hot electrons across the metal-adsorbate interface.

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