Weakened lattice-strain effect in MoOx@NPCsupported ruthenium dots toward high-efficiency hydrogen generation
- Authors
- Song, Min; Jang, Haeseong; Li, Chuang; Kim, Min Gyu; Ji, Xuqiang; Liu, Xien; Cho, Jaephil
- Issue Date
- Nov-2021
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.9, no.43, pp 24348 - 24354
- Pages
- 7
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 9
- Number
- 43
- Start Page
- 24348
- End Page
- 24354
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/69311
- DOI
- 10.1039/d1ta07558f
- ISSN
- 2050-7488
2050-7496
- Abstract
- Designing a conductive amorphous buffer layer between crystals (or lowering the crystallinity of one component) to minimize lattice-strain influence between a highly crystalline substance and nearby constituents, thus ensuring good electronic structure towards multiphase synergistic electro-catalysis, is of tremendous importance for the construction of high-performance catalysts. Here, combining solvothermal and calcination strategies, oxygen vacancy-abundant amorphous MoO3 and non-crystal MoO2 were implanted into amorphous N,P-doped carbon as MoOx/NPC to hybridize sub-10 nm crystalline ruthenium dots (Ru-MoOx/NPC). Amorphous NPC bridges MoOx with Ru crystal to avoid the direct contact of MoOx and Ru, thus weakening the lattice strain influence. The electrochemical measurement results show that Ru-MoOx/NPC exhibits excellent catalytical capacity towards hydrogen evolution reaction (HER), which only needs overpotentials of 30 mV and 27 mV to deliver the current density of 10 mA cm(-2) in alkaline and acid electrolytes, respectively, outperforming numerous recent-reported catalysts. Such superior HER activity can be attributed to structural advantages of abundant oxygen deficiency, small-sized Ru dots, conductive amorphous NPC, and weakened lattice-strain for the maximum protection of key components. This study not only presents a well-defined nanostructure with high HER activity but also offers insight into the weakening of lattice-strain effects to support the catalytical property.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - ETC > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.