Chuang Ping-Chang, Lin Chin-Yuan, Ye Si-Ting, Lai Yi-Hsuan
Department of Materials Science and Engineering, National Cheng Kung University, No.1, University Road, Tainan City, 701, Taiwan.
Academy of Innovative and Sustainable Manufacturing, National Cheng Kung University, No.1, University Road, Tainan City, 701, Taiwan.
Small. 2024 Dec;20(51):e2404478. doi: 10.1002/smll.202404478. Epub 2024 Oct 11.
Here, a nanosheet-structured CuWO (nanoCuWO) is demonstrated as a selective and stable photoanode for biomass valorization in neutral and near-neutral solutions. nanoCuWO can be readily prepared by a solid phase reaction using nanosheet-structured WO as the template. Several substrates, including glucose, fructose and glycerol, are investigated to reveal the wide applicability of nanoCuWO. The activity and product distribution trends in biomass valorization are investigated at different pH by taking advantage of the promising stability of nanoCuWO in a wide pH range. Product analyses confirm that formate production with a Faradaic efficiency (FE) of 76 ± 5% and glycolate production with an FE of 61 ± 8% can be achieved by glucose and fructose valorization at pH 10.2, respectively. On the other hand, glyceraldehyde and dihydroxyacetone (DHA) are the main products in the glycerol valorization, accounting for an FE of over 85% at pH 7. Notably, nanoCuWO has the highest FE of DHA in photoelectrochemical (PEC) glycerol valorization compared to WO and BiVO at neutral pH. The oxidation routes and mechanism of glycerol valorization on nanoCuWO are also under investigation. The co-production of H and value-added chemicals is finally demonstrated using a photovoltaic cell connected to a nanoCuWO-based PEC glycerol valorization system.
在此，一种纳米片结构的CuWO（纳米CuWO）被证明是一种用于中性和近中性溶液中生物质增值的选择性且稳定的光阳极。纳米CuWO可以通过以纳米片结构的WO为模板的固相反应轻松制备。研究了包括葡萄糖、果糖和甘油在内的几种底物，以揭示纳米CuWO的广泛适用性。利用纳米CuWO在宽pH范围内的良好稳定性，研究了不同pH下生物质增值的活性和产物分布趋势。产物分析证实，在pH 10.2时，葡萄糖和果糖增值分别可实现法拉第效率（FE）为76±5%的甲酸盐生成和FE为61±8%的乙醇酸盐生成。另一方面，甘油醛和二羟基丙酮（DHA）是甘油增值的主要产物，在pH 7时FE超过85%。值得注意的是，在中性pH下，与WO和BiVO相比，纳米CuWO在光电化学（PEC）甘油增值中DHA的FE最高。纳米CuWO上甘油增值的氧化途径和机制也在研究中。最后通过将光伏电池连接到基于纳米CuWO的PEC甘油增值系统，展示了氢气和增值化学品的联产。
