MoP is a novel, noble-metal-free cocatalyst for enhanced photocatalytic hydrogen production from water under visible light
MoP is a novel, noble-metal-free cocatalyst for enhanced photocatalytic hydrogen production from water under visible light
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DOI：
10.1039/c5ta03949e
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发表时间：
2015-08
影响因子：
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通讯作者：
Q. Yue;Yangyang Wan;Zijun Sun;Xiaojun Wu;Yupeng Yuan;Pingwu Du
中科院分区：
文献类型：
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作者：
Q. Yue;Yangyang Wan;Zijun Sun;Xiaojun Wu;Yupeng Yuan;Pingwu Du
利用多种助催化剂进行光催化水裂解制氢的研究受到了广泛的关注。本文首次报道了金属磷化钼（MoP）作为一种高活性的助催化剂，可以显著提高光催化水中制氢的效率。制备了一系列MoP/CdS纳米棒（NR）杂交种。在可见光（λ > 420 nm）照射下，MoP用量最大，H2的析出速率为163.2 μmol h−1 mg−1，比新鲜制备的CdS NRs高20倍以上。实验和理论结果表明，在当前的体系中，MoP和CdS的合适的费米能级排列是在可见光下产生H2的高光催化活性的原因。
The generation of hydrogen (H2) through photocatalytic water splitting by employing various cocatalysts has attracted much attention. Herein we report for the first time that metallic molybdenum phosphide (MoP), as a highly active cocatalyst, can significantly enhance photocatalytic H2 production from water. A series of MoP/CdS nanorod (NR) hybrids were facilely prepared. The optimal amount of MoP led to a maximal H2 evolution rate of 163.2 μmol h−1 mg−1 under visible light illumination (λ > 420 nm), which is more than 20 times higher than that of freshly prepared CdS NRs. This work demonstrated that the suitable Fermi level alignment of MoP and CdS is responsible for the high photocatalytic activity of H2 production under visible light in the present system, as evidenced by both experimental and theoretical results.