Enhancing solar-driven hydrogen production through photoelectrochemical methods via dual transition metal doping of titanium oxide to form an impurity energy band

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells Pub Date : 2024-11-07 DOI:10.1016/j.solmat.2024.113243

Ranjith Balu , Lalitha Gnanasekaran , P.C. Karthika , Omar H. Abd-Elkader , Woo Kyoung Kim , Vasudeva Reddy Minnam Reddy , Monit Kapoor , Suresh Singh , Mahimaluru Lavanya , Gautham Devendrapandi

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Abstract

Developing a photoanode that is stable, efficient, and cost-effective for photoelectrochemical water splitting poses a significant challenge. To address this, we have successfully synthesized cobalt and chromium-doped Titanium dioxide (CoCrTiO₂) using the hydrothermal method. This innovative approach results in an efficient, stable, and economical material. The introduction of Co and Cr through doping creates an intermediate band energy within TiO₂, thereby enhancing charge separation and movement. The performance of CoCrTiO₂ in the photoelectrochemical water splitting process is noteworthy. At 0 V vs Ag/AgCl, CoCrTiO₂ exhibits a photocurrent density of 3.45 mAcm⁻², representing an impressive 8.5 times increase compared to bare TiO₂. Furthermore, when employed as a photoanode, CoCrTiO₂ demonstrates a significant increase in hydrogen production. The amount of hydrogen generated is measured at 67.8 μmolecm⁻², surpassing bare TiO₂ by a factor of 5.6. Analysis data strongly supports CoCrTiO₂ as an excellent candidate for advancing the field of photoelectrochemical water splitting due to its exceptional performance characteristics.

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通过在氧化钛中掺入双过渡金属以形成杂质能带，利用光电化学方法提高太阳能驱动的制氢能力

开发稳定、高效、经济的光电化学水分离光阳极是一项重大挑战。为此，我们采用水热法成功合成了掺钴和铬的二氧化钛（CoCrTiO2）。这种创新方法产生了一种高效、稳定和经济的材料。通过掺杂引入钴和铬，在二氧化钛中产生了中间带能，从而增强了电荷分离和移动。CoCrTiO2 在光电化学分水过程中的性能值得关注。与 Ag/AgCl 相比，在 0 V 电压下，CoCrTiO2 的光电流密度为 3.45 mAcm-2，比裸 TiO2 高出 8.5 倍，令人印象深刻。此外，在用作光阳极时，CoCrTiO2 的产氢量也有显著提高。测得的氢气产生量为 67.8 μmolecm-2，比裸 TiO2 高出 5.6 倍。分析数据有力地支持了 CoCrTiO2 因其卓越的性能特点而成为推动光电化学水分离领域发展的最佳候选材料。

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来源期刊

Solar Energy Materials and Solar Cells 工程技术-材料科学：综合

CiteScore

12.60

自引率

11.60%

发文量

513

审稿时长

47 days

期刊介绍： Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.