Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, TX 79968, USA.
Dalton Trans. 2018 Jul 14;47(26):8801-8806. doi: 10.1039/c8dt00302e. Epub 2018 Jun 20.
Herein, we report a crystalline CoTcPP-based [TcPP = the anion of meso-tetra(4-carboxyphenyl)porphyrin] polymeric system, 1, as a hydrogen evolution reaction (HER) electrocatalyst in acidic aqueous media. The material was characterized by powder X-ray diffraction (p-XRD), Fourier transform infrared (FT-IR) spectroscopy, and energy dispersive X-ray (EDX) analysis and its morphology was probed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Polymer 1 shows a surface area of 441.74 m g, while the discrete CoTcPP molecule (2) shows a surface area of 3.44 m g. The HER catalytic performance was evaluated by means of linear sweep voltammetry in the presence of 0.5 M HSO aqueous solution. To achieve 10 mA cm cathodic current density, 1 and 2 respectively require an overpotential of 0.475 V and 0.666 V, providing strong evidence that the extended network of cobalt-based porphyrin leads to enhanced HER efficiency. The polymer also shows great tolerance for HER electrolysis in the presence of an acid remaining active over 10 hours.
在此，我们报告了一种基于 CoTcPP 的结晶聚合物体系 1，可作为酸性水介质中析氢反应 (HER) 的电催化剂。该材料通过粉末 X 射线衍射 (p-XRD)、傅里叶变换红外 (FT-IR) 光谱、能量色散 X 射线 (EDX) 分析进行了表征，并通过扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 探测了其形貌。聚合物 1 的比表面积为 441.74 m g，而离散的 CoTcPP 分子 (2) 的比表面积为 3.44 m g。通过在 0.5 M HSO 水溶液中进行线性扫描伏安法评估了 HER 催化性能。为了达到 10 mA cm 的阴极电流密度，1 和 2 分别需要 0.475 V 和 0.666 V 的过电势，这有力地证明了基于钴的卟啉的扩展网络导致了增强的 HER 效率。该聚合物在存在酸的情况下对 HER 电解也具有很强的耐受性，在 10 小时内仍保持活性。
