Solar Biomass Reforming and Hydrogen Production with Earth‐Abundant Si‐Based Photocatalysts

Author:

Choi Yuri1ORCID,Choi Sungho2,Lee Inhui1ORCID,Nguyen Trang Vu Thien1,Bae Sanghyun1ORCID,Kim Yong Hwan13ORCID,Ryu Jaegeon4,Park Soojin25ORCID,Ryu Jungki1367ORCID

Affiliation:

1. School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea

2. Division of Advanced Materials Science Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

3. Graduate School of Carbon Neutrality Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea

4. Department of Chemical and Biomolecular Engineering Sogang University Seoul 04107 Republic of Korea

5. Department of Chemistry Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

6. Emergent Hydrogen Technology R&D Center Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea

7. Center for Renewable Carbon Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea

Abstract

AbstractEfficient electrochemical hydrogen production and biomass refinery are crucial for the decarbonization of various sectors. However, their energy‐intensive nature and low efficiency have hindered their practical application. In this study, earth‐abundant and non‐toxic photocatalysts that can produce hydrogen and reform biomass efficiently, utilizing unlimited solar energy, are presented. The approach involves using low‐bandgap Si flakes (SiF) for efficient light‐harvesting, followed by modification with Ni‐coordinated N‐doped graphene quantum dots (Ni‐NGQDs) to enable efficient and stable light‐driven biomass reforming and hydrogen production. When using kraft lignin as a model biomass, SiF/Ni‐NQGDs facilitate record‐high hydrogen productivity at 14.2 mmol gcat−1 h−1 and vanillin yield of 147.1 mg glignin−1 under simulated sunlight without any buffering agent and sacrificial electron donors. SiF/Ni‐NQGDs can be readily recycled without any noticeable performance degradation owing to the prevention of deactivation of Si via oxidation. This strategy provides valuable insights into the efficient utilization of solar energy and practical applications of electro‐synthesis and biomass refinement.

Funder

National Research Foundation of Korea

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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