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An Efficient Bias-Free Si Photocathode Coupled BiVO4-Triethanolamine Photoelectrochemical Fuel Cell for Simultaneous Pollutant Treatment and Hydrogen Production
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-12-31 , DOI: 10.1002/adfm.202313950 Zhaoqi Wang 1, 2 , Xiaolei Liu 3 , Yuyin Mao 1 , Haipeng Zhang 1 , Peng Wang 1 , Zhaoke Zheng 1 , Yuanyuan Liu 1 , Ying Dai 1 , Hefeng Cheng 1 , Zeyan Wang 1 , Baibiao Huang 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-12-31 , DOI: 10.1002/adfm.202313950 Zhaoqi Wang 1, 2 , Xiaolei Liu 3 , Yuyin Mao 1 , Haipeng Zhang 1 , Peng Wang 1 , Zhaoke Zheng 1 , Yuanyuan Liu 1 , Ying Dai 1 , Hefeng Cheng 1 , Zeyan Wang 1 , Baibiao Huang 1
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Photoelectrochemical (PEC) fuel cells that enable organic pollutants degradation while generating H2 are regarded as a viable approach in addressing global energy and environmental issues. Herein, an efficient PEC fuel cell is constructed using oxygen vacancy-rich BiVO4 (OV:BiVO4) as the photoanode and triethanolamine (TEOA) pollutant as the fuel. Under AM 1.5 G, this OV:BiVO4–TEOA PEC fuel cell shows an ultra-high photo-driven current density of 20.40 mA cm−2 at 1.23 V versus reversible hydrogen electrode, which is superior to most reported PEC fuel cells. The Faradic efficiency of H2 production is about 97.26%, and no CO2 is released in the anode chamber due to the strong CO2 adsorption by excess TEOA. Further integration of a Pt/C cocatalyst coated Si photocathode in the OV:BiVO4–TEOA PEC fuel cell can achieve bias-free H2 production with a current density of 10.17 mA cm−2. The experimental and theoretical calculation results reveal the importance of the robust complexation between the OV:BiVO4 photoanode and TEOA, which ensures thorough conversion of chemical energy in TEOA and high activity of the PEC fuel cell. This work will guide the design of efficient PEC fuel cells for simultaneous pollutant treatment and H2 production.
中文翻译：
一种高效无偏压 Si 光阴极耦合 BiVO4-三乙醇胺光电化学燃料电池，可同时进行污染物处理和制氢
光电化学（PEC）燃料电池能够降解有机污染物并产生H 2 ，被认为是解决全球能源和环境问题的可行方法。在此，使用富含氧空位的BiVO 4 (O V :BiVO 4 )作为光电阳极和三乙醇胺(TEOA)污染物作为燃料构建了高效的PEC燃料电池。在AM 1.5 G下，这种OV : BiVO 4 –TEOA PEC燃料电池在1.23 V电压下与可逆氢电极相比表现出20.40 mA cm -2的超高光驱动电流密度，优于大多数报道的PEC燃料电池。 H 2生产的法拉第效率约为97.26%，并且由于过量的TEOA对CO 2 的强烈吸附，阳极室中没有CO 2释放。将Pt/C助催化剂涂覆的Si光阴极进一步集成到O V :BiVO 4 –TEOA PEC燃料电池中可以实现电流密度为10.17 mA cm -2的无偏压H 2生产。实验和理论计算结果揭示了O V :BiVO 4光阳极和TEOA之间稳健络合的重要性，这确保了TEOA中化学能的彻底转化和PEC燃料电池的高活性。这项工作将指导高效PEC燃料电池的设计，以同时进行污染物处理和H 2生产。
更新日期：2023-12-31
中文翻译：
一种高效无偏压 Si 光阴极耦合 BiVO4-三乙醇胺光电化学燃料电池，可同时进行污染物处理和制氢
光电化学（PEC）燃料电池能够降解有机污染物并产生H 2 ，被认为是解决全球能源和环境问题的可行方法。在此，使用富含氧空位的BiVO 4 (O V :BiVO 4 )作为光电阳极和三乙醇胺(TEOA)污染物作为燃料构建了高效的PEC燃料电池。在AM 1.5 G下，这种OV : BiVO 4 –TEOA PEC燃料电池在1.23 V电压下与可逆氢电极相比表现出20.40 mA cm -2的超高光驱动电流密度，优于大多数报道的PEC燃料电池。 H 2生产的法拉第效率约为97.26%，并且由于过量的TEOA对CO 2 的强烈吸附，阳极室中没有CO 2释放。将Pt/C助催化剂涂覆的Si光阴极进一步集成到O V :BiVO 4 –TEOA PEC燃料电池中可以实现电流密度为10.17 mA cm -2的无偏压H 2生产。实验和理论计算结果揭示了O V :BiVO 4光阳极和TEOA之间稳健络合的重要性，这确保了TEOA中化学能的彻底转化和PEC燃料电池的高活性。这项工作将指导高效PEC燃料电池的设计，以同时进行污染物处理和H 2生产。
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