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Full-Text Articles in Nanoscience and Nanotechnology
Rational Design Of Highly Efficient Electrocatalysts Using Atomic Layer Deposition: From Nanoparticle To Single Atom, Junjie Li
Electronic Thesis and Dissertation Repository
Polymer electrolyte membrane fuel cells (PEMFCs) have been attracted significant attention due to their high energy efficiency. The electrocatalyst is one of the most important parts. However, state-of-the-art electrocatalysts suffer from several challenges, including 1) low stability under harsh working conditions; 2) low atomic utilization efficiency, especially for noble metals. This thesis, therefore, focuses on the design of highly efficient and stable electrocatalysts from nanoparticles down to single atoms using atomic layer deposition (ALD) and further understand the insight mechanisms.
Firstly, Pt nanoparticles are selectively deposited on the TiO2 modified N-doped carbon nanotubes. The strong metal-support interactions between Pt …
Development Of Novel Nano-Structured Materials With Low-Cost And High Stability For Pem Fuel Cell, Dongsheng Geng
Development Of Novel Nano-Structured Materials With Low-Cost And High Stability For Pem Fuel Cell, Dongsheng Geng
Electronic Thesis and Dissertation Repository
Polymer electrolyte membrane fuel cells (PEMFCs) are non-polluting and efficient energy conversion devices that are expected to play a dominant role in energy solutions of the future. However, due to high cost and known degradation issue of Pt electrocatalyst, more durable, efficient, and inexpensive electrocatalysts are required before fuel cells can become commercially viable. This research is revolving around the development of electrocatalysts such as non-noble metal oxygen reduction reaction (ORR) catalyst, new alternative supports, and novel Pt nanostructures to address the above-mentioned challenges in PEMFCs.
Firstly, we report the synthesis of nitrogen doped carbon nanotubes (CNx) and …