RuO2/TiO2 异质结构作为析氢光电催化剂的实验与理论相结合的研究,Dalton Transactions

当前位置： X-MOL 学术 › Dalton Trans. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

RuO2/TiO2 异质结构作为析氢光电催化剂的实验与理论相结合的研究
Dalton Transactions ( IF 3.5 ) Pub Date : 2023-02-09 , DOI: 10.1039/d2dt04123e
Mohammad Kaikhosravi ₁ , Hassan Hadadzadeh ₁ , Hossein Farrokhpour ₁ , Abdollah Salimi ₂ , Hamed Mohtasham ₂ , Annette Foelske ₃ , Markus Sauer ₃

Affiliation

_{我们报告了 RuO 2} /TiO ₂异质结构的联合实验和理论研究。在实验部分，介孔 RuO ₂ /TiO ₂异质结构通过浸渍由新前体 Na ₂ [Ti(C ₂ O ₄ ) _{3 ] 合成的介孔 TiO}₂纳米粒子在钌(III)水溶液中制备。) 氯化物，然后在 300 °C 下煅烧。采用多种技术，制备了 TiO ₂和 RuO ₂ /TiO ₂异质结构得到广泛表征。然后研究了所制备的异质结构的光电催化在析氢反应 (HER) 中的应用。结果表明RuO ₂均匀分散在TiO ₂表面。在TiO ₂上负载RuO ₂降低了带隙能量并且将吸收边缘扩展到可见光区域。_{这种广泛的吸收扩展了 RuO 2} /TiO ₂异质结构的光电催化活性。_{为了更深入地了解与纯 TiO 2}相比， RuO ₂ /TiO ₂异质结构的光电催化活性的增加_{，对纯TiO 2}和RuO ₂ /TiO ₂异质结构的一些模型簇进行了密度泛函理论(DFT) 水平的理论计算。理论结果表明，与纯 TiO _{2相比，RuO}₂ /TiO ₂的电子-空穴对复合率有效降低。

"点击查看英文标题和摘要"

A combined experimental and theoretical study of RuO2/TiO2 heterostructures as a photoelectrocatalyst for hydrogen evolution

We report a joint experimental and theoretical study of RuO₂/TiO₂ heterostructures. In the experimental section, mesoporous RuO₂/TiO₂ heterostructures were prepared by impregnation of mesoporous TiO₂ nanoparticles which were synthesized from a new precursor, Na₂[Ti(C₂O₄)₃], in an aqueous solution of ruthenium(III) chloride followed by calcination at 300 °C. Using various techniques, the prepared TiO₂ and RuO₂/TiO₂ heterostructures were extensively characterized. The photoelectocatalytic application of the as-prepared heterostructures was then investigated toward the hydrogen evolution reaction (HER). The results illustrated that RuO₂ is dispersed uniformly on the TiO₂ surface. The loading of RuO₂ on TiO₂ decreases the band gap energy and extends the absorption edge to the visible light region. This wide absorption extends the photoelectrocatalytic activity of RuO₂/TiO₂ heterostructures. To obtain a deeper understanding of the increase of the photoelectrocatalytic activity of RuO₂/TiO₂ heterostructures compared to pure TiO₂, theoretical calculations at the density functional theory (DFT) level were performed on some model clusters of pure TiO₂ and the RuO₂/TiO₂ heterostructure. The theoretical results elucidated that the recombination ratio of electron–hole pairs decreases effectively for RuO₂/TiO₂ compared to pure TiO₂.

更新日期：2023-02-09

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>