Hydrogen evolution and electric power generation through photoelectrochemical oxidation of cellulose dissolved in aqueous solution
Hydrogen evolution and electric power generation through photoelectrochemical oxidation of cellulose dissolved in aqueous solution
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DOI：
10.1016/j.apcatb.2023.122431
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发表时间：
2023-02
期刊：
影响因子：
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通讯作者：
Yosuke Kageshima;Hiromasa Wada;Katsuya Teshima;Hiromasa Nishikiori
中科院分区：
文献类型：
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作者：
Yosuke Kageshima;Hiromasa Wada;Katsuya Teshima;Hiromasa Nishikiori
构建了能够通过氧化溶解在水溶液中的纤维素来产生电或氢的光电化学（PEC）电池。与固体纤维素不同，纤维素液体燃料有利于实现连续的反应物供应。产物分析表明，纤维素大分子裂解成小的有机酸，最后分解成CO2。在发电过程中，PEC电池的最大功率密度达到1.13 mW cm-2。阐明了光电极结构对光电转换器性能的影响。由锚定到背面金属层上的SrTiO 3颗粒的近似单层组成的光阳极的单片结构在析氧期间提供高光电流。由TiO 2纳米颗粒堆积而成的多孔光阳极由于具有高的比表面积而被认为适合于纤维素的分解。本研究为废弃生物质的直接能源化利用奠定了基础。
Photoelectrochemical (PEC) cells capable of generating electricity or hydrogen through the oxidation of cellulose dissolved in an aqueous solution were constructed. As distinct from solid cellulose, the cellulose liquid fuel was beneficial for enabling a continuous reactant supply. Product analyses revealed that the cellulose macromolecules were cleaved to small organic acids and finally decomposed to CO2. During the electricity generation, the maximum power density of the PEC cell reached 1.13 mW cm−2. The influence of the photoelectrode structure on the PEC performance was elucidated. The monolithic structure of photoanodes consisting of an approximate monolayer of SrTiO3particles anchored onto the backside metal layer provided a high photocurrent during oxygen evolution. The porous photoanode composed of heavily stacked TiO2nanoparticles was found to be suitable for cellulose decomposition because of the high specific surface area. The present study should serve as a foundation for the direct energy utilization of waste biomass.