Enhanced Photocatalytic H2-Production Activity of g-C3N4 Nanosheets via Optimal Photodeposition of Pt as Cocatalyst
Enhanced Photocatalytic H2-Production Activity of g-C3N4 Nanosheets via Optimal Photodeposition of Pt as Cocatalyst
复制标题
通过 Pt 作为助催化剂的最佳光沉积增强 g-C3N4 纳米片的光催化产氢活性
DOI：
10.1021/acssuschemeng.8b01835
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发表时间：
2018-08-01
影响因子：
8.4
通讯作者：
Yu, Jiaguo
中科院分区：
文献类型：
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作者：
Liu, Mingjin;Xia, Pengfei;Yu, Jiaguo
光催化制氢在缓解化石燃料危机和建设可持续发展世界中具有重要作用。石墨碳氮化物纳米片（CNS），加上助催化剂铂（Pt）和空穴牺牲剂三乙醇胺（TEOA），往往表现出优异的H2-生产活性。然而，在该给定的含TEOA的系统中使Pt量最大化的问题仍然没有解决。在本文中，发现在Pt的光沉积之前或之后将TEOA添加到反应体系中的顺序对CNS上的光催化产氢具有显著影响。具体而言，当预先加入TEOA时，Pt的含量较低，这意味着Pt-前体H2PtCl6和TEOA之间存在较强的相互作用，从而抑制了光还原成金属Pt。因此，仅通过交换添加TEOA的顺序，就获得了大约4倍的产氢活性增量（4210.8 vs. 972.2 μ mol h-1 g-1）。此外，表观量子效率…
Photocatalytic H2 production plays an important role in alleviating fossil fuel crisis and constructing a sustainable world. Graphitic carbon nitride nanosheets (CNS), coupled with cocatalyst platinum (Pt) and hole sacrificial agent triethanolamine (TEOA), often show excellent H2-production activity. However, the question on maximizing Pt amount in this given TEOA-contained system still remains unsolved. Herein, it was found that the order of adding TEOA into the reaction system before or after the photodeposition of Pt had a significant effect on photocatalytic hydrogen production over CNS. Specifically, the content of Pt was lower when TEOA was added beforehand, implying that a strong interaction existed between the Pt-precursor H2PtCl6 and TEOA, thus curbing the photoreduction to metallic Pt. Therefore, a roughly 4-fold increment in hydrogen production activity (4210.8 vs. 972.2 μmol h–1 g–1) was obtained by merely swapping the sequence of the addition of TEOA. Moreover, the apparent quantum efficiency...