Accelerating the Hole Mobility of Graphitic Carbon Nitride for Photocatalytic Hydrogen Evolution via 2D/2D Heterojunction Structural Advantages and Ni(OH)2 Characteristic,Solar RRL

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Accelerating the Hole Mobility of Graphitic Carbon Nitride for Photocatalytic Hydrogen Evolution via 2D/2D Heterojunction Structural Advantages and Ni(OH)2 Characteristic
Solar RRL ( IF 6.0 ) Pub Date : 2020-03-31 , DOI: 10.1002/solr.201900538
Quanguo Hao _{1,

2} , Yanhua Song ₃ , Zhao Mo ₁ , Jiujun Deng ₁ , Jianjian Yi ₁ , Wiam El-Alami ₁ , Hui Xu ₁ , Huaming Li ₁

Affiliation

Although photocatalytic hydrogen evolution is significant for solar conversion and energy supply, the photocatalytic efficiency is hampered by the low photoinduced holes mobility. Herein, the 2D Ni(OH)₂ as an operational cocatalyst is integrated with 2D graphitic carbon nitride (2D‐CN) ultrafine to form a 2D/2D heterojunction to improve the photocatalytic hydrogen evolution. Due to the high mobility attribute of the Ni(OH)₂ holes and the unique 2D/2D heterojunction of Ni(OH)₂/CN, the specific photocatalyst Ni(OH)₂/2D‐CN accelerates the photocarrier separation/transport, thereby achieving the breakthrough of continuous photocatalytic hydrogen evolution without using Pt cocatalyst and sacrificial agent. Above all, the as‐obtained Ni(OH)₂/2D‐CN exhibits a hydrogen evolution rate of 921.4 μmol h⁻¹ g⁻¹ with an external quantum efficiency of 5.21% at 400 nm using 10% triethanolamine as a sacrificial agent. The work provides a new research approach for the catalytic conversion of energy.

中文翻译：

通过2D / 2D异质结结构优势和Ni（OH）2特性加速石墨化氮化碳的空穴迁移，以光催化制氢

尽管光催化氢的释放对于太阳能转换和能量供应很重要，但是低的光诱导空穴迁移率阻碍了光催化效率。在此，将2D Ni（OH）₂作为有效的助催化剂与2D石墨氮化碳（2D-CN）超细颗粒集成在一起，形成2D / 2D异质结，以改善光催化氢的释放。由于Ni（OH）₂空穴的高迁移率属性和Ni（OH）₂ / CN独特的2D / 2D异质结，因此特定的光催化剂Ni（OH）₂/ 2D-CN加速了光载体的分离/传输，从而实现了连续光催化氢释放的突破，而无需使用Pt助催化剂和牺牲剂。最重要的是，使用10％三乙醇胺作为牺牲剂，所获得的Ni（OH）₂ / 2D-CN的析氢速率为921.4μmolh ^-1 g ^-1，在400 nm处的外部量子效率为5.21％。这项工作为能量的催化转化提供了一种新的研究方法。

更新日期：2020-03-31

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