The successful design of a hybrid supercapacitor with high power and energy density is mainly based on innovative materials and unique structures. Herein, self-supported Ni–Co(CO₃)_0.5(OH)·0.11H₂O@MnNiCo–OH (Ni–CCH@MnNiCo–OH) with a hollow core/shell cactus-like structure was synthesized as a battery-type positive electrode and KOH-activated ZIF-67 derived Co, N dual-doped hierarchical ZIF-67-C-KOH was prepared as a capacitive-type negative electrode. Benefiting from the optimized ZIF-67-template modification and polymetallic co-deposition tactics, the positive electrode exhibits an outstanding specific capacity of 8.2 C cm⁻² at 1.5 mA cm⁻² (1029.3 C g⁻¹ at 1 A g⁻¹) and an impressive cycling retention of 88% after 3000 cycles at 20 mA cm⁻², which are better than those of Ni–Co₃O₄@ZIF-67-Co₃O₄, Ni–CCH@NiCo–OH and Ni–CCH@MnCo–OH electrodes. Likewise, ZIF-67-C-KOH profits from the nitrogen-rich and porous properties of the precursor and can attain a specific capacitance of 262.4 F g⁻¹ at 1 A g⁻¹ as well as an excellent rate performance of 82% at 10 A g⁻¹. The assembled Ni–CCH@MnNiCo–OH//ZIF-67-C-KOH hybrid device has a maximum voltage window of 1.8 V and achieves a specific capacitance of 187.3 F g⁻¹ at 1 A g⁻¹, a high energy density of 84.29 W h kg⁻¹ at a power density of 900 W kg⁻¹ as well as a fantastic stability up to 5000 cycles (74.91% retention at 2 A g⁻¹), showing enormous potential in energy-storage applications.

Framework W-doped TS-1 zeolite synthesized via a one-pot hydrothermal synthesis displayed more Lewis acid active sites as well as a larger external surface area, and accordingly a better catalytic performance in oxidative desulfurization reactions in comparison to W-MFI and Ti-MFI zeolite catalysts.

The gas–liquid reaction process for acetylene hydrochlorination, especially using ionic liquids (ILs) as homogeneous reaction media, has gained much attention because it can effectively avoid the deactivation caused by hot spots and carbon deposition. However, the relatively low activity and high price of the currently used ILs limit their practical applications. Herein, we synthesize a series of chlorocuprate(I) ILs to explore an efficient and stable Cu-based catalyst for acetylene hydrochlorination. The N-methylpyrrolidonium hydrochloride–0.60CuCl ([Hnmpo]Cl–0.60CuCl) IL exhibits the best catalytic performance, showing an acetylene conversion of 86% over 150 h under the conditions of 180 °C and 50 h⁻¹ GHSV. It is confirmed that the Cu(I) species is the major active component and extremely stable under the reaction conditions via characterization of TGA-DSC-FTIR, ICP-OES, XPS, UV-vis, ESI-MS, and Raman. In addition, the [Hnmpo]Cl–0.60CuCl IL has the capacity to effectively activate HCl, which is directly observed by in situ FTIR. By combining the experimental results and theoretical calculations, we propose the reaction mechanism and find that the catalytic performance of chlorocuprate(I) ILs is positively correlated with the adsorption of HCl. The strong interaction with HCl is identified as the key characteristic of the [Hnmpo]Cl–CuCl IL, which endows it with excellent catalytic performance. Briefly, this study shows that the cost-effective [Hnmpo]Cl–CuCl IL can be a viable alternative to the commercial heterogeneous HgCl₂/AC catalyst for acetylene hydrochlorination.