462071 Titanium-Based, Hierarchical, Flow-through Catalyst for Water Electrolysis Fabricated Via a Combination of Additive Manufacturing and Anodization

Wednesday, November 16, 2016
Grand Ballroom B (Hilton San Francisco Union Square)
Patricia Taboada-Serrano, Chemical Engineering, Rochester Institute of Technology, Rochester, NY, Xiang Li, Microsystems Engineering PhD Program, Rochester Institute of Technology, Rochester, NY and Costas Tsouris, Energy and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN

This work proposes a metal-based catalyst that can potentially overcome the hurdles towards industrial-scale hydrogen production including: (1) high cost of precious metals, (2) simplicity and scalability of fabrication of catalysts and electrodes, and (3) enabling large-scale, continuous hydrogen production.

A titanium-based catalyst was fabricated via combining 3D printing and in-situ anodization in order to grow highly-ordered TiO2 nanotubes (NTs) onto a microporous 3D Ti-metal base as current collector. The performance of the reported 3D Ti/TiO2 electrocatalyst was tested for hydrogen-evolution reaction (HER) via water electrolysis.

The proposed electroatalyst features the following advantages: (1) the fabrication method for the 3D Ti/TiO2 composite is simple and scalable; (2) the 3D Ti/TiO2 composite features a flow-through architecture that not only enables more efficient utilization of the surface area of the catalyst but that could enable large-scale, continuous-flow hydrogen-production reactor technologies; and (3) minimization of electrical resistance between active surface area (TiO2 NTs) and current collector.

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