New insights into graphite paper as electrocatalytic substrate for oxygen evolution reaction
| Autor: | Lili Wu, Xiaoxin Li, Qinglan Ye, Wankun Zhao, Ruan Jinyan, Fan Wang, Xiaoyu Zheng, Xuetang Xu |
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| Rok vydání: | 2017 |
| Předmět: |
Tafel equation
Materials science Inorganic chemistry Oxygen evolution General Physics and Astronomy Substrate (chemistry) 02 engineering and technology Surfaces and Interfaces General Chemistry Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrocatalyst 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Catalysis Electrode Graphite 0210 nano-technology |
| Zdroj: | Applied Surface Science. 396:1146-1154 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2016.11.102 |
| Popis: | Designing highly efficient electrocatalysts for oxygen evolution reaction is important to meet the requirement of various renewable energy storage and conversion devices. Generally, the performance of OER catalysts can be significantly improved by synergistic action of the underlying conductive substrate. In this work, a commercial graphite paper was used as a facile substrate with catalytic activity. Graphite paper produced 10 mA cm −2 at an overpotential of 447 mV with a Tafel slope of 62 mV dec −1 . By depositing NiFe hydroxide or Mn oxide film onto the graphite paper, the electrode presented a superior activity for water oxidation, which was believed to be synergistically contributed by their available electrochemically active sites associated with the deposited film and the active substrate. High activities were also accompanied by remarkable durability at large current density levels. Our results illustrated a guideline to the design of inexpensive and highly active composite electrode for water oxidation. |
| Databáze: | OpenAIRE |
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