期刊
SUSTAINABLE ENERGY & FUELS
卷 5, 期 23, 页码 6077-6084出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1se01259b
关键词
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资金
- National Science Foundation of China [31922057, 31890771]
- Young Elite Scientists Sponsorship Program from National Forestry and Grassland Administration of China [2019132614]
- Hunan Provincial Technical Innovation Platform and Talent Program in Science and Technology [2018RS3092, 2018WK4028]
- Outstanding Innovative Youth Training Program of Changsha [KQ2009059]
- project of National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials [2020KFJJ07]
The OER performance of wood carbon improves with the increase of carbonization temperature, with better performance obtained at a carbonization temperature of 900 degrees C. Among the wood carbons studied, poplar carbon exhibited better electrocatalytic activity due to its cross-distribution of pores and pore diameter.
Natural wood has attracted enormous attention in the electrocatalysis field due to its hierarchical porous structure and excellent electrical conductivity after carbonization. Different wood species as a carbon substrate have a significant impact on the electrocatalytic performance. Herein, to fundamentally understand the electrochemical catalytic performance of carbonized natural wood, the oxygen evolution reaction (OER) performances of various carbonized wood (pine, fir, poplar, and balsa) calcined at different temperature were studied. The OER performance of wood carbon was improved with the increase of carbonization temperature, and better OER performance was obtained at a carbonization temperature of 900 degrees C. The overpotentials of pine carbon, fir carbon, poplar carbon, and balsa carbon are 507 mV, 539 mV, 490 mV, and 651 mV, respectively, at a current density of 10 mA cm(-2). The pore structure of wood carbon significantly affected the OER activity. Among the four types of wood carbon, poplar carbon exhibited better electrocatalytic activity due to its cross-distribution of pores and pore diameter. This work is conducive to the selection of suitable wood carbon substrates for the preparation of environmentally friendly electrocatalysts, and is of great significance for improving the efficiency of electrocatalytic water splitting to produce clean and sustainable hydrogen energy.
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