Ansari Toufik, Bagchi Debabrata, Ghosh Suptish, Niklas Hausmann Jan, Indra Arindam, Menezes Prashanth W
Department of Chemistry, IIT (BHU), Varanasi, UP-221005, India.
Material Chemistry Group for Thin Film Catalysis, CatLab, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489, Berlin, Germany.
Chemistry. 2025 Mar 6;31(14):e202404174. doi: 10.1002/chem.202404174. Epub 2025 Jan 13.
Water-assisted electrocatalytic oxidation of alcohols into valuable chemicals is a promising strategy to circumvent the sluggish kinetics of water oxidation, while also reducing cell voltage and improving energy efficiency. Recently, transition metal (TM)-based catalysts have been investigated for anodic alcohol oxidation, but success has been limited due to competition from the oxygen evolution reaction (OER) within the working regime. In this study, NiCo-based Prussian blue analog (PBA) was electrochemically activated at the anodic potential to produce a Co-Ni(O)OH active catalyst with a nanosheet-like architecture. This catalyst was further employed for the selective oxidation of benzyl alcohol (PhCHOH) to benzoic acid (PhCOOH), achieving a 97 % Faradaic efficiency (FE). The electrochemical activity of Co-Ni(O)OH was also compared with hydrothermally prepared CoNi-LDH, demonstrating that the PBA-derived Co-Ni(O)OH was more effective.
水辅助电催化将醇类氧化为有价值的化学品是一种很有前景的策略，可规避水氧化反应缓慢的动力学问题，同时还能降低电池电压并提高能源效率。最近，基于过渡金属（TM）的催化剂已被研究用于阳极醇类氧化，但由于在工作范围内析氧反应（OER）的竞争，成功案例有限。在本研究中，基于镍钴的普鲁士蓝类似物（PBA）在阳极电位下进行电化学活化，以制备具有纳米片状结构的Co-Ni(O)OH活性催化剂。该催化剂进一步用于将苯甲醇（PhCHOH）选择性氧化为苯甲酸（PhCOOH），实现了97%的法拉第效率（FE）。还将Co-Ni(O)OH的电化学活性与水热法制备的CoNi-LDH进行了比较，结果表明PBA衍生的Co-Ni(O)OH更有效。
