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One-Step Excitation Overall Water Splitting over a Modified Mg-Doped BaTaO2N Photocatalyst
ACS Catalysis ( IF 11.3 ) Pub Date : 2022-08-05 , DOI: 10.1021/acscatal.2c02394 Huihui Li 1, 2 , Jiadong Xiao 2 , Junie Jhon M. Vequizo 2 , Takashi Hisatomi 2, 3 , Mamiko Nakabayashi 4 , Zhenhua Pan 2 , Naoya Shibata 4 , Akira Yamakata 5 , Tsuyoshi Takata 2 , Kazunari Domen 2, 6
ACS Catalysis ( IF 11.3 ) Pub Date : 2022-08-05 , DOI: 10.1021/acscatal.2c02394 Huihui Li 1, 2 , Jiadong Xiao 2 , Junie Jhon M. Vequizo 2 , Takashi Hisatomi 2, 3 , Mamiko Nakabayashi 4 , Zhenhua Pan 2 , Naoya Shibata 4 , Akira Yamakata 5 , Tsuyoshi Takata 2 , Kazunari Domen 2, 6
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BaTaO2N responds to visible light up to 650 nm and exhibits photocatalytic activity during the hydrogen and oxygen evolution reactions. However, the difficulty in promoting both processes simultaneously hinders the realization of overall water splitting (OWS) over this material. Herein, we demonstrate the activation and stabilization of BaTaO2N–based photocatalysts for visible-light-driven OWS by combining flux-assisted nitridation with Mg doping and co-loading of Cr2O3/(Na)Rh and IrO2 co-catalysts. RbCl-assisted nitridation produced single-crystal BaTaO2N particles doped with Mg and so promoted charge transfer to the co-catalysts. The co-loading of Cr2O3/(Na)Rh and IrO2 at moderate temperatures as co-catalysts to promote the hydrogen and oxygen evolution reactions, respectively, allowed the BaTaO2N photocatalyst to evolve hydrogen and oxygen simultaneously from water. This work highlights the importance of carefully tuning semiconducting and catalytic properties to realize effective charge transfer when preparing narrow-bandgap oxynitrides for OWS.
中文翻译：
改性 Mg 掺杂 BaTaO2N 光催化剂的一步激发全水分解
BaTaO 2 N 对高达 650 nm 的可见光有响应，并在析氢和析氧反应中表现出光催化活性。然而，同时促进这两个过程的困难阻碍了在这种材料上实现整体水分解（OWS）。在此，我们通过将助焊剂氮化与 Mg 掺杂以及 Cr 2 O 3 /(Na)Rh 和 IrO 2共负载相结合，展示了用于可见光驱动 OWS的 BaTaO 2 N 基光催化剂的活化和稳定化。催化剂。RbCl 辅助氮化产生了掺杂有Mg 的单晶BaTaO 2 N 颗粒，从而促进了电荷向助催化剂的转移。Cr 2 O的共载3 /(Na)Rh 和 IrO 2在中等温度下作为助催化剂分别促进氢和氧的析出反应，使 BaTaO 2 N 光催化剂能够同时从水中析出氢和氧。这项工作强调了在为 OWS 制备窄带隙氧氮化物时仔细调整半导体和催化性能以实现有效电荷转移的重要性。
更新日期：2022-08-05
中文翻译：
改性 Mg 掺杂 BaTaO2N 光催化剂的一步激发全水分解
BaTaO 2 N 对高达 650 nm 的可见光有响应，并在析氢和析氧反应中表现出光催化活性。然而，同时促进这两个过程的困难阻碍了在这种材料上实现整体水分解（OWS）。在此，我们通过将助焊剂氮化与 Mg 掺杂以及 Cr 2 O 3 /(Na)Rh 和 IrO 2共负载相结合，展示了用于可见光驱动 OWS的 BaTaO 2 N 基光催化剂的活化和稳定化。催化剂。RbCl 辅助氮化产生了掺杂有Mg 的单晶BaTaO 2 N 颗粒，从而促进了电荷向助催化剂的转移。Cr 2 O的共载3 /(Na)Rh 和 IrO 2在中等温度下作为助催化剂分别促进氢和氧的析出反应，使 BaTaO 2 N 光催化剂能够同时从水中析出氢和氧。这项工作强调了在为 OWS 制备窄带隙氧氮化物时仔细调整半导体和催化性能以实现有效电荷转移的重要性。
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