Dependence of activity and stability of germanium nitride powder for photocatalytic overall water splitting on structural properties
Dependence of activity and stability of germanium nitride powder for photocatalytic overall water splitting on structural properties
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DOI：
10.1021/cm0709828
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发表时间：
2007-07
影响因子：
8.6
通讯作者：
K. Maeda;N. Saito;Y. Inoue;K. Domen
中科院分区：
文献类型：
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作者：
K. Maeda;N. Saito;Y. Inoue;K. Domen
氮化锗（Ge 3 N4）粉末制备的热氨解GeO 2作为光催化剂的整体水裂解检查。在高于1123 K的温度下，在NH3气流中对GeO 2进行氮化10 h，根据氮化条件的不同，产生单一相的β-Ge 3 N4或元素Ge、α-Ge 3 N4和β-Ge 3 N4的混合物。β-Ge 3 N4在紫外光（λ > 200 nm）照射下，以纳米RuO 2为助催化剂，对纯水进行化学计量分解，得到H2和O2。提高β-Ge 3 N4催化剂的结晶度，导致更大的整体水裂解活性和显着减少的N2释放，由于自分解的光生空穴。
Germanium nitride (Ge3N4) powder prepared by thermal ammonolysis of GeO2 is examined as a photocatalyst for overall water splitting. Nitridation of GeO2 under a flow of NH3 at temperatures higher than 1123 K for 10 h results in production of either a single phase of β-Ge3N4 or a mixture of elemental Ge, α-Ge3N4, and β-Ge3N4, depending on the nitridation conditions. β-Ge3N4 exhibits activity for the stoichiometric decomposition of pure water into H2 and O2 under ultraviolet (UV) irradiation (λ > 200 nm) when loaded with nanoparticulate RuO2 as a cocatalyst. Improving the crystallinity of the β-Ge3N4 catalyst results in greater activity for overall water splitting and markedly reduced N2 release due to self-decomposition by photogenerated holes.