Hollow CoSe2 nanocages derived from metal-organic frameworks as efficient non-precious metal co-catalysts for photocatalytic hydrogen production

Eun Hwa Kim, D. Amaranatha Reddy, Hwan Lee, Seonghyun Jeong, D. Praveen Kumar, Jae Kyu Song, Manho Lim, Tae Kyu Kim

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Photocatalytic water splitting by semiconductor nanostructures is a challenging chemical process for harnessing abundant solar energy and obtaining clean H2 fuel. To this end, photocatalysts that comprise efficient light-harvesting semiconductor nanostructures and noble metal-free robust co-catalysts have attracted considerable attention. In this study, we designed a noble metal-free nanohybrid consisting of CdS nanorods (NRs) as photoabsorbers and CoSe2 nanocages as co-catalysts. Benefiting from suitable band edge potentials, abundant catalytically active sites, large surface area, and efficient photoexcited charge carrier transfer, the fabricated nanohybrid exhibited a remarkable photocatalytic H2 evolution performance (82.5 mmol h-1 g-1), which is approximately 37.5 times higher than that of bare CdS NRs. Moreover, the observed H2 evolution rate was even higher than those of even noble metal Pt-anchored CdS NR composites. Furthermore, the fabricated nanohybrid exhibited prominent recycling stability (50 h) under solar light irradiation. The key role of the co-catalyst, the effects of the catalyst dosage and scavenger concentration, and the origin of the photocatalytic H2 production were comprehensively investigated. We believe that this design is the prospective path toward the development of three-dimensional hollow-type noble metal-free nanostructures for enhancing H2 production.

Original languageEnglish
Pages (from-to)4702-4710
Number of pages9
JournalCatalysis Science and Technology
Volume9
Issue number17
DOIs
Publication statusPublished - 2019

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grants funded by the Korean Government (2014R1A4A1001690, 2016R1E1A1A01941978, 2016K1A4A4A01922028 and 2018R1A2B6001779).

All Science Journal Classification (ASJC) codes

  • Catalysis

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