Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting-Reference-Cited by-同舟云学术

Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting

Published:2022-08-12 Issue:32 Volume:8 Page:
ISSN:2375-2548
Container-title:Science Advances
language:en
Short-container-title:Sci. Adv.

Author:

Nishioka Shunta¹^ORCID,Hojo Koya¹^ORCID,Xiao Langqiu²^ORCID,Gao Tianyue²,Miseki Yugo³^ORCID,Yasuda Shuhei⁴^ORCID,Yokoi Toshiyuki⁴,Sayama Kazuhiro³^ORCID,Mallouk Thomas E.²⁵^ORCID,Maeda Kazuhiko¹^ORCID

Affiliation:

1. Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.

2. Department of Chemistry, University of Pennsylvania, 231 S. 34th Street Philadelphia, PA 19104, USA.

3. Global Zero Emission Research Center (GZR), National Institute of Advanced Industrial Science and Technology (AIST), West, 16-1, Onogawa, Tsukuba, Ibaraki 305-8569, Japan.

4. Nanospace Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan.

5. International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan.

Abstract

While dye-sensitized metal oxides are good candidates as H 2 evolution photocatalysts for solar-driven Z-scheme water splitting, their solar-to-hydrogen (STH) energy conversion efficiencies remain low because of uncontrolled charge recombination reactions. Here, we show that modification of Ru dye–sensitized, Pt-intercalated HCa 2 Nb 3 O 10 nanosheets ( Ru /Pt/HCa 2 Nb 3 O 10 ) with both amorphous Al 2 O 3 and poly(styrenesulfonate) (PSS) improves the STH efficiency of Z-scheme overall water splitting by a factor of ~100, when the nanosheets are used in combination with a WO 3 -based O 2 evolution photocatalyst and an I 3 − /I − redox mediator, relative to an analogous system that uses unmodified Ru /Pt/HCa 2 Nb 3 O 10 . By using the optimized photocatalyst, PSS/ Ru /Al 2 O 3 /Pt/HCa 2 Nb 3 O 10 , a maximum STH of 0.12% and an apparent quantum yield of 4.1% at 420 nm were obtained, by far the highest among dye-sensitized water splitting systems and comparable to conventional semiconductor-based suspended particulate photocatalyst systems.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference37 articles.

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