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Hiệu ứng neo molybdenum trong chất xúc tác Fe–Mo/MgO cho tổng hợp ống nano carbon đa lớp
Tóm tắt
Hai chất xúc tác đơn kim loại dựa trên Fe và bốn chất xúc tác hai kim loại dựa trên Fe–Co và Fe–Mo, được hỗ trợ trên Al2O3 và MgO thương mại, đã được thử nghiệm trong quá trình tổng hợp ống nano carbon (CNT) bằng pyrolysis etilen xúc tác. Mục tiêu là đánh giá ảnh hưởng của việc bổ sung Mo vào Fe, cùng với vai trò cụ thể của vật liệu hỗ trợ. Kính hiển vi điện tử truyền qua đã chỉ ra một hiệu ứng tương hỗ giữa Mo và MgO: tương tác kim loại-vật liệu hỗ trợ tối ưu (MSI) dẫn đến các hạt nano Fe–Mo nhỏ, rõ ràng và phân bố cao, cho phép hiệu suất pyrolysis tốt nhất. Điều này có thể được mô tả như là năng suất CNT cao nhất được trình bày trên diện tích bề mặt cụ thể của chất xúc tác, cũng như các ống nano CNT mỏng nhất với phân bố đường kính hẹp nhất. Thăm dò Raman và nhiễu xạ tia X của các ống nano CNT thu được trên cùng một chất xúc tác tiết lộ chất lượng cao nhất của chúng về mặt khuyết tật mạng, cũng như độ trong suốt.
Từ khóa
#ống nano carbon #chất xúc tác #Fe–Co #Fe–Mo #Al2O3 #MgO #pyrolysis etilen #kính hiển vi điện tử truyền qua #tương tác kim loại-vật liệu hỗ trợ #hiệu suất pyrolysisTài liệu tham khảo
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