Photoelectrochemical Complete Decomposition of Cellulose for Electric Power Generation
Photoelectrochemical Complete Decomposition of Cellulose for Electric Power Generation
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DOI：
10.1002/cctc.202001665
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发表时间：
2020-12
期刊：
影响因子：
4.5
通讯作者：
Yosuke Kageshima;T. Yoshimura;Sangho Koh;M. Mizuno;Katsuya Teshima;Hiromasa Nishikiori
中科院分区：
文献类型：
--
作者：
Yosuke Kageshima;T. Yoshimura;Sangho Koh;M. Mizuno;Katsuya Teshima;Hiromasa Nishikiori
一种由多孔TiO2光阳极和Pt阴极组成的光辅助燃料电池（photofuel cell； PFC）在含有有机燃料的水电解质中被开发出来，通过光电化学分解燃料来产生电能。虽然直接利用纤维素作为燃料是可取的，但光催化直接分解纤维素这种高分子聚合物的报道很少。在本研究中，纤维素薄膜沉积在TiO2光阳极上作为燃料。结果表明，纤维素通过小羰基烃中间体分解为CO2。纤维素完全分解为二氧化碳意味着纤维素的几乎所有吉布斯自由能都可以在光子能量的帮助下转化为电能。由纤维素沉积的TiO2和铂沉积的Ni泡沫组成的PFC具有优异的光电性能（光电压为1.1 V，量子效率高达52%）。目前的研究应该是一种基于可再生能源的发电的潜在手段，通过有效地处理废弃生物质。
A photo‐assisted fuel cell (photofuel cell; PFC) consisting of a porous TiO2 photoanode and a Pt cathode in an aqueous electrolyte containing an organic fuel has been developed to generate an electric power by photoelectrochemically decomposing the fuel. Although direct utilization of cellulose as a fuel should be preferable, photocatalytic direct decomposition of cellulose, polymeric macromolecules, has been rarely reported. In the present study, a cellulose thin film deposited onto the TiO2 photoanode was used as the fuel. It was revealed that the cellulose was decomposed into CO2 through small carbonyl hydrocarbon intermediates. The complete decomposition of cellulose into CO2 implies that almost all the Gibbs free energy of cellulose can be converted into an electric power with the assistance of the photon energy. The PFC composed of the cellulose‐deposited TiO2 and Pt‐deposited Ni foam exhibited excellent photovoltaic performances (1.1 V of photovoltage and quantum efficiency up to 52 %). The present study should represent a potential means of electric power generation based on renewable energy sources by effectively treating waste biomass.