Effect of transition metal oxide cocatalyst on the photocatalytic activity of Ag loaded CaTiO3 for CO2 reduction with water and water splitting
Effect of transition metal oxide cocatalyst on the photocatalytic activity of Ag loaded CaTiO3 for CO2 reduction with water and water splitting
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DOI：
10.1016/j.apcatb.2021.119899
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发表时间：
2021-01-28
影响因子：
22.1
通讯作者：
Yoshida, Hisao
中科院分区：
文献类型：
--
作者：
Soltani, Tayyebeh;Zhu, Xing;Yoshida, Hisao
通过不同的负载方法将由Ag和过渡金属氧化物（TMOx）组成的各种双助催化剂负载在CaTiO3（CTO）光催化剂上，并以水作为电子供体检测光催化CO2还原。与单一Ag助催化剂的结果相比，负载双助催化剂的CTO光催化剂表现出相似或更低的CO释放速率和更高的H-2产量，这意味着这些光催化剂表现出CO2还原和水分解的光催化活性。通过光沉积法负载的 Ag 和 TMOx 双助催化剂比通过浸渍法负载的双助催化剂具有更高的 CO 产率。具有单一 TMOx 助催化剂的 CTO 光催化剂在 H-2 析出和 O-2 析出测试中均表现出比裸 CTO 和负载双助催化剂的 CTO 光催化剂更高的活性，表明水分解的光催化活性被 Ag 助催化剂抑制，但被 TMOx 提高。
Various dual cocatalysts consisting of Ag and transition metal oxide (TMOx) were loaded on a CaTiO3 (CTO) photocatalyst by different loading methods and examined for the photocatalytic CO2 reduction with water as an electron donor. Compared to the results provided with the single Ag cocatalyst, the dual cocatalyst loaded CTO photocatalyst exhibited a similar or less CO evolution rate and higher H-2 production, meaning that these photocatalyst showed photocatalytic activity for both CO2 reduction and water splitting. Dual cocatalysts of Ag and TMOx loaded by a photodeposition gave higher CO production rate than those loaded by an impregnation method. The CTO photocatalysts with a single TMOx cocatalyst showed higher activities in both H-2 evolution and O-2 evolution test than the bare CTO and dual cocatalyst loaded CTO photocatalysts, indicating that the photocatalytic activity for water splitting is suppressed by the Ag cocatalyst but improved by the TMOx.