Structure, Morphology and Catalytic Activity of PtRu/RGO Prepared by Different Processes
Structure, Morphology and Catalytic Activity of PtRu/RGO Prepared by Different Processes
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DOI：
10.4028/www.scientific.net/aef.38.38
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Kenta Dejima;H. Ishitobi;N. Nakagawa
中科院分区：
文献类型：
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作者：
Kenta Dejima;H. Ishitobi;N. Nakagawa
为了开发直接甲醇燃料电池活性催化剂及其制备工艺，以不同粒径的还原氧化石墨烯（RGO）为原料，采用三种不同的工艺制备了PtRu/RGO催化剂，大大小小的。第一种方法（A）涉及RGO的干燥，第二种方法（B）不涉及干燥，第三种方法（P）也不涉及干燥，但经过聚多巴胺改性。(A)由于堆叠而导致RGO的大团聚体，并且PtRu还在RGO团聚体的外表面上形成纳米颗粒的团聚体。(B)由于RGO的堆叠，导致低Pt利用率。(P)改进了其ECSA、Pt利用率和质量活性，这是由于改性允许在RGO上均匀且小尺寸的PtRu沉积。然而，也提出了减少PtRu和RGO之间的正相互作用的修饰的问题。较小的RGO在（P）中是优选的，但在（A）和（B）中不是。
With the aim of developing an active catalyst for a direct methanol fuel cell and its preparation process, PtRu supported on reduced graphene oxide (RGO), PtRu/RGO, was prepared by three different processes using RGO with different sizes, i.e., large and small. The first process (A) involves the drying of RGO, the second one (B) does not involve the drying, and the third one (P) also does goes not involve the drying but goes through a polydopamine modification. (A) results in large agglomerates of RGO due to stacking and PtRu also formed agglomerates of nanoparticles on the outer surface of the RGO agglomerates. (B) resulted in a low Pt utilization due to the stacking of RGO. (P) improved its ECSA, Pt utilization and mass activity due to the modification that allows a homogeneous and small size PtRu deposition on the RGO. However, a problem with the modification that reduce the positive interaction between PtRu and RGO was also suggested. A smaller RGO was preferred in (P), but not in (A) and (B).