Robles Christian, Montañés Laura, Mesa Camilo A, Iglesias Diego, Rabelo Helena, Spadaro Maria Chiara, Arbiol Jordi, Redondo Jesús, Schiller Frederik, Barja Sara, Julián-López Beatriz, Gutiérrez-Blanco Ana, Sans Víctor, Giménez Sixto
Institute of Advanced Materials (INAM), Universitat Jaume I, Av. Vicente Sos Baynat s/n., 12006, Castellón, Spain.
Catalan Institute of Nanoscience and Nanotechnology (ICN2) and BIST, Campus UAB, Bellaterra, 08193, Barcelona, Spain.
ChemSusChem. 2025 Jun 2;18(11):e202402583. doi: 10.1002/cssc.202402583. Epub 2025 Feb 21.
Cost-effective and efficient photoelectrochemical (PEC) water splitting stands out as one of the most promising strategies to address sustainable energy supply in the form of green H. Large-area photoelectrodes featuring precise chemical and morphological control are key components for a practical solar-to-hydrogen conversion. Herein, we report the continuous flow synthesis of BiVO nanoparticles (NPs) by using a simple microreactor configuration. The solution containing the as-prepared NPs enables the deposition of BiVO photoanodes with areas up to 52 cm through a simple and scalable chemical bath deposition method. On the other hand, surface protection by an ultrathin AlO overlayer grown by atomic layer deposition (ALD) increases the performance of the 1 cm BiVO photoanodes ~30 %, exhibiting a photocurrent density of ~2.0 mA⋅cm at 1.23 V vs. the Reversible Hydrogen Electrode in the presence of a sacrificial hole scavenger. The optimized continuous flow synthesis provides an affordable methodology for the fabrication of cost-effective, large-scale photoanodes, which could potentially be applied for different photoelectrochemical reactions.
具有成本效益且高效的光电化学（PEC）水分解作为以绿色氢气形式解决可持续能源供应问题的最有前景的策略之一脱颖而出。具有精确化学和形态控制的大面积光电极是实际太阳能到氢能转换的关键组件。在此，我们报告了使用简单的微反应器配置连续流动合成BiVO纳米颗粒（NPs）。含有所制备NPs的溶液通过简单且可扩展的化学浴沉积方法能够沉积面积达52 cm²的BiVO光阳极。另一方面，通过原子层沉积（ALD）生长的超薄Al₂O₃覆盖层进行表面保护，可使1 cm²的BiVO光阳极性能提高约30%，在存在牺牲空穴清除剂的情况下，相对于可逆氢电极在1.23 V时表现出约2.0 mA·cm⁻²的光电流密度。优化后的连续流动合成提供了一种经济实惠的方法来制造具有成本效益的大规模光阳极，其有可能应用于不同的光电化学反应。
