MoS2/TiO2 heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution

Guo, L.; Yang, Z.; Marcus, K.; Li, Z.; Luo, B.; Zhou, L.; Wang, X.; Du, Y.; Yang, Y.

doi:10.1039/C7EE02464A

MoS₂/TiO₂ heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution

Journal Article · Sun Dec 31 23:00:00 EST 2017 · Energy & Environmental Science

DOI:https://doi.org/10.1039/C7EE02464A· OSTI ID:1439663

^[1]; Yang, Z. ^[2]; Marcus, K. ^[3]; Li, Z. ^[3]; Luo, B. ^[4]; Zhou, L. ^[3]; Wang, X. ^[4]; Du, Y. ^[2]; ^[5]

NanoScience Technology Center; University of Central Florida; Orlando; USA
Physical and Computational Sciences Directorate; Pacific Northwest National Laboratory; Richland; USA
Department of Materials Science and Engineering; University of Central Florida; Orlando; USA
State Key Laboratory of New Ceramics and Fine Processing; Department of Materials Science and Engineering; Tsinghua University; Beijing 100084; China
NanoScience Technology Center; University of Central Florida; Orlando; USA; Department of Materials Science and Engineering

In this study, we report a nonmetal plasmonic MoS2@TiO2 heterostructure for highly efficient photocatalytic H2 generation. Large area laminated Z-scheme MoS2 in conjunction with TiO2 nanocavity arrays are achieved via carefully controlled anodization, physical vapor deposition, and chemical vapor deposition processes. Broad spectral response ranging from ultraviolet (UV)-visible (vis) to near-infrared (NIR) wavelengths and finite element frequency-domain simulation suggest that this MoS2@TiO2 heterostructured photocatalyst possesses an enhanced activity for H+ reduction. A high H2 yield rate of 580 mmol h-1 g-1 is achieved using a low catalyst loading mass of 10.2 μg. The spatially uniform heterostructure, correlated to plasmon-resonance through conformal coating MoS2 that effectively regulated charge transfer pathways, is proven to be vitally important for the unique solar energy harvesting and photocatalytic H2 production. As an innovative exploration, our study demonstrates that the photocatalytic activities of nonmetal, earth-abundant materials can be enhanced with plasmonic effects, which may serve as an excellent catalytic agent for solar energy conversion to chemical fuel.

Periodically patterned MoS₂/TiO₂heterostructures were rationally designed as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution.

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

DOE Contract Number:: AC05-76RL01830

OSTI ID:: 1439663

Report Number(s):: PNNL-SA-129523; 49597; KC0203020

Journal Information:: Energy & Environmental Science, Journal Name: Energy & Environmental Science Journal Issue: 1 Vol. 11; ISSN EESNBY; ISSN 1754-5692

Publisher:: Royal Society of Chemistry

Country of Publication:: United States

Language:: English

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