Additively manufactured 316L stainless steel: An efficient electrocatalyst |
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| Affiliation: | 1. School of Engineering and Technology, Central Michigan University, Mt. Pleasant, MI, 48859, USA;2. Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada;1. Chemistry Department, Faculty of Science, Cairo University, Cairo, 12613, Egypt;2. Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo, 11835, Egypt;1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China;2. Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China;3. Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China;1. School of Engineering and Technology, Central Michigan University, Mt. Pleasant, MI, USA;2. Science of Advanced Materials, Central Michigan University, Mt. Pleasant, MI, USA;3. Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada;4. Corrosion Control Research Cell, Department of Metallurgy and Materials Engineering, University of the Punjab, Lahore 54590, Pakistan;1. Center for Applied Chemistry, University of Electronic Science & Technology of China, Chengdu 610054, China;2. Materials Research Institute and Department of Ecosystem Science and Management, 204 Energy and the Environment Laboratory, The Pennsylvania State University, University Park, PA 16802, USA;1. School of Engineering and Technology, Central Michigan University, Mt. Pleasant, MI, 48859, USA;2. Department of Materials Engineering, The University of British Columbia, Vancouver, BC, V6T 1Z4, Canada;3. Department of Biology, Central Michigan University, Mt. Pleasant, 48859, MI, USA |
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| Abstract: | In the quest of finding an economical, yet efficient material, the idea of fabricating 316L stainless steel using additive manufacturing technology was explored to produce material with refined sub-granular structure. The surface of the stainless steel was further chemically treated with an etching solution to expose the grain boundaries. The grain boundary enriched surface resulted in more active sites for the oxygen evolution reaction (OER) in additively manufactured treated (AM-T) 316L stainless steel. AM-T sample manifests enhanced catalytic activity for OER with an overpotential of 310 mV to draw a 10 mA/cm2 current density, along with a lower Tafel slope of 42 mV/dec compared to AM and wrought samples. These features were validated from the increased double-layer capacitance of AM-T and approximately 1.5 times larger electrochemically effective surface area of AM-T due to etching treatment compared to the wrought sample. Furthermore, AM-T also possesses stable activity retention for 100 h at a current density of 10 mA/cm2. |
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| Keywords: | Additive manufacturing Stainless steel OER Overpotential |
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