Photocatalytic overall water splitting on gallium nitride powder
Photocatalytic overall water splitting on gallium nitride powder
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DOI：
10.1246/bcsj.80.1004
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发表时间：
2007-05-15
影响因子：
4
通讯作者：
Domen, Kazunari
中科院分区：
文献类型：
--
作者：
Maeda, Kazuhiko;Teramura, Kentaro;Domen, Kazunari
研究了氮化镓（GaN）粉末作为光催化剂用于整体水裂解。GaN的光催化活性的反应被发现是强烈依赖于材料的结晶度和所采用的助催化剂。用Rh 2-yCryO 3纳米粒子作为助催化剂对结晶良好的GaN进行改性，在紫外光照射下（λ> 300 nm），H2O通过带隙跃迁稳定地化学计量分解为H2和O2。RuO_2改性没有引起明显的H ~-_2和O ~-_2释放。低结晶度的GaN表现出可忽略不计的整体水分解的活性，无论应用的助催化剂的种类。
Gallium nitride (GaN) powder was studied as a photocatalyst for overall water splitting. The photocatalytic activity of GaN for the reaction was found to be strongly dependent on the crystallinity of the material and the cocatalyst employed. Modification of well-crystallized GaN with Rh2-yCryO3 nanoparticles as a cocatalyst for H-2 evolution resulted in the stable stoichiometric decomposition of H2O into H-2 and O-2 under ultraviolet irradiation (lambda > 300 nm) by the band gap transition. RuO2 modification did not bring about appreciable H-2 and O-2 evolution. Low-crystallinity GaN exhibits negligible activity for overall water splitting, regardless of the kind of cocatalyst applied.