Abstract In this work, Pt loaded Na+ doped graphitic carbon nitride (g-C3N4) catalyst for photocatalytic water splitting to produce H2 and H2O2 simultaneously without any sacrificial agent was prepared for the first time. Both products are high-value chemicals and in gas-liquid two phases, which avoid the trouble of separation. XRD, N2 adsorption, UV–Vis, SEM, TEM, PL, XPS and ESR were used to characterize the as-prepared catalysts. The CB and VB of as-prepared catalysts can be adjusted from −1.22 V and + 1.46 V for g-C3N4 to −0.06 V and + 2.42 V for NaCN [ 9 ] by controlling the Na+ concentration. The reaction result indicates that a moderate band position is significantly important for effective photocatalytic water splitting to simultaneously produce H2 and H2O2. After loading of Pt to promote the electron-hole separation efficiency, Pt-NaCN [ 6 ] displays the optimal H2 and H2O2 production abilities of 900 μmol·g−1·h−1 and 880 μmol·g−1, simultaneously. This work opens a new window for photocatalytic water splitting research.

中文翻译：

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在负载 Pt 的 Na+ 引入 g-C3N4 催化剂上通过双电子还原过程光催化水分解同时产生 H2 和 H2O2

摘要 本工作首次制备了负载Pt的Na+掺杂石墨氮化碳(g-C3N4)催化剂，用于光催化分解水同时不使用任何牺牲剂制备H2和H2O2。两种产品均为高价值化学品，均为气液两相，免去了分离的麻烦。XRD、N2 吸附、UV-Vis、SEM、TEM、PL、XPS 和 ESR 用于表征所制备的催化剂。通过控制 Na+ 浓度，制备的催化剂的 CB 和 VB 可以从 g-C3N4 的 -1.22 V 和 + 1.46 V 调整到 NaCN [ 9 ] 的 -0.06 V 和 + 2.42 V。反应结果表明，适度的能带位置对于有效的光催化分解水同时产生 H2 和 H2O2 非常重要。在负载 Pt 以提高电子空穴分离效率后，Pt-NaCN [ 6 ] 同时显示出 900 μmol·g-1·h-1 和 880 μmol·g-1 的最佳 H2 和 H2O2 生产能力。这项工作为光催化分解水的研究打开了新的窗口。