Zhang Baofeng, Zhang Chuguo, Yang Ou, Yuan Wei, Liu Yuebo, He Lixia, Hu Yuexiao, Zhao Zhihao, Zhou Linglin, Wang Jie, Wang Zhong Lin
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, People's Republic of China.
College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
ACS Nano. 2022 Sep 27;16(9):15286-15296. doi: 10.1021/acsnano.2c06701. Epub 2022 Sep 13.
Water splitting for yielding high-purity hydrogen represents the ultimate choice to reduce carbon dioxide emission owing to the superior energy density and zero-pollution emission after combustion. However, the high electricity consumption and requirement of large quantities of pure water impede its large-scale application. Here, a triboelectric nanogenerator (W-TENG) converting offshore wind energy into electricity is proposed for commercial electric energy saving and cost reduction. By introducing PTFE/POM dielectric pairs with matched HOMO/LUMO band gap energy, a high charge density is achieved to promote the output of W-TENG. With the impedance matching design of transformers with the internal resistance of W-TENG, the output current is further enhanced from 1.42 mA to 54.5 mA with a conversion efficiency of more than 92.0%. Furthermore, benefiting from the high electrocatalytic activity (overpotential = 166 mV and Tafel slope = 181.2 mV dec) of a carbon paper supported NiCoP-MOF catalyst, natural seawater can be adopted as a resource for in situ hydrogen production without acid or alkaline additives. Therefore, the self-powered seawater electrolysis system achieves a H production rate as high as 1273.9 μL min m with a conversion efficiency of 78.9%, demonstrating a more practical strategy for conversion of wind energy into renewable hydrogen energy.
由于燃烧后具有卓越的能量密度和零污染排放，通过水分解产生高纯度氢气是减少二氧化碳排放的最终选择。然而，高耗电量和对大量纯水的需求阻碍了其大规模应用。在此，提出了一种将海上风能转化为电能的摩擦纳米发电机（W-TENG），以实现商业节能和成本降低。通过引入具有匹配的最高占据分子轨道/最低未占分子轨道带隙能量的聚四氟乙烯/聚甲醛介电对，实现了高电荷密度以促进W-TENG的输出。通过对具有W-TENG内阻的变压器进行阻抗匹配设计，输出电流从1.42 mA进一步提高到54.5 mA，转换效率超过92.0%。此外，受益于碳纸负载的NiCoP-MOF催化剂的高电催化活性（过电位 = 166 mV，塔菲尔斜率 = 181.2 mV dec），天然海水可作为原位制氢的资源，无需添加酸或碱。因此，自供电海水电解系统实现了高达1273.9 μL min m的产氢速率，转换效率为78.9%，展示了一种将风能转化为可再生氢能的更实用策略。
