Designing the gas, liquid, and electron pathways for electrocatalytic gas-involving systems
Abstract/Contents
- Abstract
- Developing sustainable techniques to produce fuels and chemicals is indispensable in reducing carbon dioxide emissions while providing chemical feedstocks for daily use. Large-scale electrocatalytic applications for energy conversion with high cell efficiency are promising candidates but suffer from various problems, of which elucidating and mitigating electrode mass transport issues and system resistance are two crucial aspects. In this dissertation, I first introduce the background and problems of gas-harnessing and gas-generating electrocatalytic reactions, along with discussions about current strategies for enabling their use. Next, I focus on an electrode design to improve the mass transport of gas reactants to enhance the overall electrocatalytic performance by mimicking the mammalian inhalation process. Then, I tackle the gas product bubble-induced resistance by mimicking the mammalian exhalation process to enhance electrocatalytic gas evolution performance. By constructing bubble-free gas evolution electrodes, I conduct comprehensive investigations of the causes of bubble generation in porous membrane systems and identified three key parameters—membrane permeability, membrane hydrophobicity, and electrical conductivity. Finally, I demonstrate a 3D 3-phase electrode design that considers three pathways--electron, ion, and gas--as well as effective catalytic active sites including both quality (activity) and quantity (loading). Using a hydrogen model system with platinum catalysts, this 3D continuous 3-phase matrix electrode exhibits superior on-site hydrogen generation, separation, and reusage performance.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2021; ©2021 |
| Publication date | 2021; 2021 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Li, Jun |
|---|---|
| Degree supervisor | Cui, Yi, 1976- |
| Thesis advisor | Cui, Yi, 1976- |
| Thesis advisor | Hong, Guosong |
| Thesis advisor | Kanan, Matthew William, 1978- |
| Degree committee member | Hong, Guosong |
| Degree committee member | Kanan, Matthew William, 1978- |
| Associated with | Stanford University, Department of Chemistry |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Jun Li. |
|---|---|
| Note | Submitted to the Department of Chemistry. |
| Thesis | Thesis Ph.D. Stanford University 2021. |
| Location | https://purl.stanford.edu/xv214cv6793 |
Access conditions
- Copyright
- © 2021 by Jun Li
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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