Cobalt-doping and CoOx cocatalyst synergistically enhances BiVO4 photoelectrochemical water and methane oxidation

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters Pub Date : 2025-08-01 Epub Date: 2025-04-10 DOI:10.1016/j.matlet.2025.138569

Alessandra P. Rodrigues , Maximiliano J.M. Zapata , Carla P. Ricardo , Cauê A. Martins , Heberton Wender

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Abstract

This study presents a BiVO₄ (BVO) photoanode modified with cobalt doping and CoO_x cocatalyst (Co₁₀BVO/CoO_x) to enhance photoelectrochemical (PEC) performance, particularly for methane oxidation. While BVO is well-studied for water oxidation, its application in methane conversion remains limited. The synergistic effect of Co-doping and CoO_x significantly improves PEC performance, achieving photocurrent densities of 4.2 and 4.6 mA/cm² at 1.23 V_RHE for water and methane oxidation, respectively. Despite maintaining structural, optical, and morphological properties like pristine BVO, Co₁₀BVO/CoO_x exhibits reduced charge transfer resistance, increased carrier density, and a lower onset potential, enhancing PEC activity. These findings highlight the potential of this dual modification strategy for solar-driven methane valorization and sustainable fuel production.

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钴掺杂和CoOx助催化剂协同增强BiVO4光电化学水和甲烷氧化

本研究提出了一种用钴掺杂和 CoOx 助催化剂（Co10BVO/CoOx）修饰的 BiVO4（BVO）光阳极，以提高光电化学（PEC）性能，尤其是甲烷氧化性能。虽然对 BVO 在水氧化方面的研究很深入，但其在甲烷转化方面的应用仍然有限。掺杂 Co 和 CoOx 的协同效应显著提高了光电化学性能，在 1.23 VRHE 条件下，水和甲烷氧化的光电流密度分别达到 4.2 和 4.6 mA/cm2。尽管 Co10BVO/CoOx 保持了原始 BVO 的结构、光学和形貌特性，但却降低了电荷转移电阻，提高了载流子密度，降低了起始电位，从而增强了 PEC 活性。这些发现凸显了这种双重改性策略在太阳能驱动的甲烷价值化和可持续燃料生产方面的潜力。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive