Ziyu Yi

Bio: Ziyu Yi is an academic researcher from Northeastern University (China). The author has co-authored 1 publications.

ZIF-67-based catalysts for oxygen evolution reaction

Abstract: As a new type of crystalline porous material, the imidazole zeolite framework (ZIF) has attracted widespread attention due to its ultra-high surface area, large pore volume, and unique advantage of easy functionalization. Developing different methods to control the shape and composition of ZIF is very important for its practical application as catalyst. In recent years, nano-ZIF has been considered an electrode material with excellent oxygen evolution reaction (OER) performance, which provides a new way to research electrolyzed water. This review focuses on the morphological engineering of the original ZIF-67 and its derivatives (core-shell, hollow, and array structures) through doping (cation doping, anion doping, and co-doping), derivative composition engineering (metal oxide, phosphide, sulfide, selenide, and telluride), and the corresponding single-atom catalysis. Besides, combined with DFT calculations, it emphasizes the in-depth understanding of actual active sites and provides insights into the internal mechanism of enhancing the OER and proposes the challenges and prospects of ZIF-67 based electrocatalysts. We summarize the application of ZIF-67 and its derivatives in the OER for the first time, which has significantly guided research in this field.

PdCo Alloy Supported on a ZIF-Derived N-Doped Carbon Hollow Polyhedron for Dehydrogenation of Ammonia Borane

Abstract: Ammonia borane (NH3BH3, AB) is a promising material for hydrogen storage/production. We applied a facile thermal treatment to synthesize a PdCo alloy anchored on a nitrogen-doped carbon hollow polyhedron (PdCo@NCHP) derived from a core–shell ZIF-8@ZIF-67 crystal for use as a highly efficient catalyst for hydrogen generation from AB. The as-prepared PdCo@NCHP exhibited excellent activity toward hydrolytic dehydrogenation of AB in neutral and alkaline solutions, with a turnover frequency (TOF) of 470.57 and 881.91 molH2·molPd–1·min–1 at 303 K, respectively, and a relatively low activation energy of 36.9 kJ·mol–1. The impressive catalytic performance may be attributed to the electronic interaction between Pd and Co, the synergistic effects of the PdCo nanoparticles and the NCHP support, and the hollow-structured NCHP support with its large pore volume, high surface area, high nitrogen content, and high graphitization. These results enhance the prospect of AB in practical hydrogen storage.

The Novel Dual-Category Active Sites of NiCoP/CoP as High-Performance Electrocatalyst for Urea Electrolysis and Synergistic Hydrogen Production

Abstract: Combining the urea oxidation reaction (UOR) instead of the oxygen evolution reaction (OER) with the hydrogen evolution reaction (HER) is a promising method to generate low-energy absorption of H2, and...