Tuning Ag-modified NaTaO3 to achieve high CO selectivity for the photocatalytic conversion of CO2 using H2O as the electron donor
Tuning Ag-modified NaTaO3 to achieve high CO selectivity for the photocatalytic conversion of CO2 using H2O as the electron donor
复制标题
调节 Ag 修饰的 NaTaO3 以实现使用 H2O 作为电子供体光催化转化 CO2 的高 CO 选择性
DOI：
10.1016/j.apcatb.2022.121885
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Kentaro*
中科院分区：
文献类型：
--
作者：
Xu;Xuanwen; Asakura;Hiroyuki; Hosokawa;Saburo; Tanaka;Tsunehiro*; Teramura;Kentaro*
以H2O为电子给体，将载银NaTaO 3用于CO2的光催化转化，考察了纳米粒子的粒径、载银量和晶体结构对催化剂活性和CO选择性的影响。Ag纳米粒子的尺寸可以通过控制光沉积时间来调节，并且发现相对较大的Ag纳米粒子表现出较高的CO选择性。在光催化反应过程中，由于Ag的溶解和再沉积，最初的多晶Ag纳米颗粒变成单晶，并且形貌的变化降低了CO选择性。为了解决这个问题，开发了具有核-壳结构的Ag-Cr双助催化剂。随后，由于铬壳层的保护，在反应过程中，NaTaO 3表面的Ag纳米颗粒的位置和尺寸得以保持，从而通过H2O光催化转化CO2提供稳定和选择性的CO生产。
Ag-loaded NaTaO3was used for the photocatalytic conversion of CO2using H2O as the electron donor, and the effect of the nanoparticle size, Ag loading, and crystal structure on the photocatalytic activity and CO selectivity were investigated. The sizes of the Ag nanoparticles could be tuned by controlling the photodeposition time, and relatively larger Ag nanoparticles were found to show higher CO selectivity. During the photocatalytic reaction, the initially polycrystalline Ag nanoparticles became single crystalline owing to the dissolution and redeposition of Ag, and the change in morphology reduced the CO selectivity. To solve this problem, Ag-Cr dual cocatalysts having a core–shell structure were developed. Subsequently, the locations and sizes of the Ag nanoparticles on the surfaces of NaTaO3were maintained during the reaction because of the protection by the chromium shell, thus providing stable and selective CO production via the photocatalytic conversion of CO2by H2O.