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Integrated Heterostructure of PDA/Bi‐AgIn5S8/TiO2 for Photoelectrochemical Hydrogen Production: Understanding the Synergistic Effect of Multilayer Structure
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2018-02-28 , DOI: 10.1002/admi.201701574 Peng Guan 1 , Hongye Bai 1 , Chunfa Li 1 , Yilin Ge 1 , Dongbo Xu 2 , Biyi Chen 1 , Teng Xia 1 , Weiqiang Fan 1 , Weidong Shi 1
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2018-02-28 , DOI: 10.1002/admi.201701574 Peng Guan 1 , Hongye Bai 1 , Chunfa Li 1 , Yilin Ge 1 , Dongbo Xu 2 , Biyi Chen 1 , Teng Xia 1 , Weiqiang Fan 1 , Weidong Shi 1
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Overcoming one of most challenging limitations of bare TiO2 with large bandgap can be achieved by rational design and fabrication of heterostructures. Multicomponent sulfides with a nature of tunable band structure can be a good alternative to decorating TiO2, but there remains a major trade‐off between the high efficiency and the long‐term durability, so the stability issue must be addressed upon the use of sulfides. Here, an effective strategy is demonstrated with Bi‐doped AgIn5S8 (Bi‐AgIn5S8) decorated TiO2 photoanode, where twofold enhancement of the photocurrent is achieved. More importantly, it is the first time to integrate polydopamine passivation layer and AgIn5S8 for simultaneously enhancing the solar conversion efficiency and stability. The incident photon‐to‐current conversion efficiency value is tuned up to 45% (0.4 V vs Ag/AgCl), and the photocurrent density can keep for 90.8% after 5 h. Corresponding hydrogen evolution rate has increased to 8.6 µmol h−1, which is three times higher than that of bare TiO2.
中文翻译：
PDA / Bi-AgIn5S8 / TiO2的集成异质结构用于光电化学制氢：了解多层结构的协同效应
通过合理设计和制造异质结构，可以克服具有较大带隙的裸露TiO 2最具挑战性的局限性之一。具有可调带状结构的多组分硫化物可以代替TiO 2装饰，但是在高效率和长期耐用性之间仍存在重大折衷，因此在使用硫化物时必须解决稳定性问题。在这里，用双掺杂AgIn 5 S 8（Bi-AgIn 5 S 8）装饰的TiO 2证明了一种有效的策略。光电阳极，实现了光电流的两倍增强。更重要的是，这是第一次将聚多巴胺钝化层和AgIn 5 S 8集成在一起，以同时提高太阳能转换效率和稳定性。入射光子至电流的转换效率值可调节至45％（0.4 V对Ag / AgCl），并且5小时后光电流密度可保持90.8％。相应的氢气析出速率增加到8.6 µmol h -1，是裸TiO 2的三倍。
更新日期：2018-02-28
中文翻译：
PDA / Bi-AgIn5S8 / TiO2的集成异质结构用于光电化学制氢：了解多层结构的协同效应
通过合理设计和制造异质结构，可以克服具有较大带隙的裸露TiO 2最具挑战性的局限性之一。具有可调带状结构的多组分硫化物可以代替TiO 2装饰，但是在高效率和长期耐用性之间仍存在重大折衷，因此在使用硫化物时必须解决稳定性问题。在这里，用双掺杂AgIn 5 S 8（Bi-AgIn 5 S 8）装饰的TiO 2证明了一种有效的策略。光电阳极，实现了光电流的两倍增强。更重要的是，这是第一次将聚多巴胺钝化层和AgIn 5 S 8集成在一起，以同时提高太阳能转换效率和稳定性。入射光子至电流的转换效率值可调节至45％（0.4 V对Ag / AgCl），并且5小时后光电流密度可保持90.8％。相应的氢气析出速率增加到8.6 µmol h -1，是裸TiO 2的三倍。
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