journal article·2025-01Open access

Ambient Sunlight Driven Photothermal Green Syngas Production at 100 m3 Scale by the Dynamic Structural Reconstruction of Iron Oxides with 38.7% Efficiency

Qixuan Wu, Jialin Wang, Dachao Yuan, Yachuan Wang, Yaguang Li, Yunna Guo, Zhibo Zhang, Xingyuan San, Liqiang Zhang, Jinhua Ye

Advanced Functional Materials· Volume 35· Issue 2

Abstract

Abstract Ambient sunlight‐driven photothermal green syngas production via reverse water‐gas shift (RWGS) reaction is important for carbon neutrality, which lacks efficient and inexpensive catalysts at low temperatures. This studydemonstrates that the scalable Fe3O4 supported with K atoms modified Ag nanoparticles (AgK/Fe3O4) exhibits a RWGS CO production rate of 1089 mmol g−1 h−1 at 300 °C and 100% CO selectivity through dynamic structural reconstruction, surpassing all reported platinum‐based catalysts. In situ characterization and theoretical simulation indicate that the AgK nanoparticles activate H2 to reduce Fe3O4 as metallic Fe. Subsequently, the metallic Fe spontaneously reacts with CO2 to form CO and Fe3O4, thereby facilitating low‐temperature RWGS. Owing to its superior low‐temperature performance, AgK/Fe3O4 equipped with a homemade photothermal device achieves one sun‐driven photothermal RWGS with a CO production rate of 1925 mmol g−1 h−1 and a 38.7% solar to enthalpy energy conversion efficiency. Furthermore, the enlarged outdoor demonstration yields 100.6 m3day−1 of green syngas with an H2/CO ratio of 3. This work paves the way for designing efficient platinum‐free CO2 hydrogenation catalysts and introduces a new approach for sunlight‐driven scalable green syngas production.
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Research context

OpenAlex topics: Catalytic Processes in Materials Science · Electrocatalysts for Energy Conversion · Catalysts for Methane Reforming

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Research Center for Solar Driven Carbon Neutrality Engineering Research Center of Zero‐carbon Energy Buildings and Measurement Techniques Ministry of Education The College of Physics Science and Technology Institute of Life Science and Green Development Hebei University Baoding 071002 China

College of Mechanical and Electrical Engineering Key Laboratory Intelligent Equipment and New Energy Utilization of Livestock and Poultry Breeding Hebei Agricultural University Baoding 071001 China

Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China

Institute of New Materials Guangdong Academy of Sciences National Engineering Research Center of Powder Metallurgy of Titanium & Rare Metals Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application Guangzhou 510000 China

International Center for Materials Nanoarchitectonics (WPI‐MANA) National Institute for Materials Science (NIMS) 1‐1 Namiki Tsukuba Ibaraki 305‐0044 Japan

Graduate School of Chemical Science and Engineering Hokkaido University Sapporo 060–0814 Japan

Funding

National Natural Science Foundation of China · Natural Science Foundation of Hebei Province · Hebei University

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