FeS2 Nanoparticles Embedded in Reduced Graphene Oxide toward Robust,High‐Performance Electrocatalysts |
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| Authors: | Yanan Chen Shaomao Xu Yuanchang Li Rohit Jiji Jacob Yudi Kuang Boyang Liu Yilin Wang Glenn Pastel Lourdes G Salamanca‐Riba Michael R Zachariah Liangbing Hu |
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| Institution: | 1. Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, USA;2. National Center for Nanoscience and Technology, Beijing, China;3. Department of Chemical and Biomolecular Engineering and Chemistry and Biochemistry, University of Maryland College Park, College Park, MD, USA |
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| Abstract: | Developing low‐cost, highly efficient, and robust earth‐abundant electrocatalysts for hydrogen evolution reaction (HER) is critical for the scalable production of clean and sustainable hydrogen fuel through electrochemical water splitting. This study presents a facile approach for the synthesis of nanostructured pyrite‐phase transition metal dichalcogenides as highly active, earth‐abundant catalysts in electrochemical hydrogen production. Iron disulfide (FeS2) nanoparticles are in situ loaded and stabilized on reduced graphene oxide (RGO) through a current‐induced high‐temperature rapid thermal shock (≈12 ms) of crushed iron pyrite powder. FeS2 nanoparticles embedded in between RGO exhibit remarkably improved electrocatalytic performance for HER, achieving 10 mA cm?2 current at an overpotential as low as 139 mV versus a reversible hydrogen electrode with outstanding long‐term stability under acidic conditions. The presented strategy for the design and synthesis of highly active earth‐abundant nanomaterial catalysts paves the way for low‐cost and large‐scale electrochemical energy applications. |
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| Keywords: | 2D materials catalysis FeS2 nanoparticles ultrafast water splitting |
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