Department of Chemistry, Faculty of Science, Bilkent University, 06800 Ankara, Turkey.
NANOTAM-Nanotechnology Research Center, Bilkent University, 06800 Ankara, Turkey.
Chem Commun (Camb). 2022 Aug 18;58(67):9341-9344. doi: 10.1039/d2cc02912j.
3-Dimensional (3D) cyanide coordination polymers, typically known as Prussian blue Analogues (PBAs), have received great attention in catalysis due to their stability, easily tuned metal sites, and porosity. However, their high crystallinities and relatively low number of surface-active sites significantly hamper their intrinsic catalytic activities. Herein, we report the utilization of a 2-dimensional (2D) layered cobalt tetracyanonickelate, [Co-Ni], for the reduction of protons to H. Relying on its exposed facets, layered morphology, and abundant surface-active sites, [Co-Ni] can efficiently convert water and sunlight to H in the presence of a ruthenium photosensitizer (Ru PS) with an optimal evolution rate of 30 029 ± 590 μmol g h, greatly exceeding that of 3D Co-Fe PBA [Co-Fe] and Co-Co PBA [Co-Co]. Furthermore, [Co-Ni] retains its structural integrity throughout a 6 hour photocatalytic cycle, which is confirmed by XPS, PXRD, and Infrared analysis. This recent work reveals the excellent morphologic properties that promote [Co-Ni] as an attractive catalyst for the hydrogen evolution reaction (HER).
三维（3D）氰根配位聚合物，通常称为普鲁士蓝类似物（PBAs），由于其稳定性、可灵活调节的金属位点和多孔性，在催化领域受到了广泛关注。然而，其高结晶度和相对较少的表面活性位点极大地限制了其内在的催化活性。在此，我们报告了二维（2D）层状钴四氰镍酸盐 [Co-Ni] 在质子还原为 H 的应用。得益于其暴露的面、层状形态和丰富的表面活性位点，[Co-Ni] 在钌敏化剂（Ru PS）的存在下可以有效地将水和阳光转化为 H，最佳的演化速率为 30029 ± 590 μmol g h，大大超过了 3D Co-Fe PBA [Co-Fe] 和 Co-Co PBA [Co-Co]。此外，[Co-Ni] 在 6 小时光催化循环中保持其结构完整性，这通过 XPS、PXRD 和红外分析得到了证实。这项最新工作揭示了促进 [Co-Ni] 作为析氢反应（HER）有吸引力的催化剂的优异形态特性。
