The exact short time propagator, in a form similar to the Crank-Nicholson method but in the spirit of spectrally transformed Hamiltonian, was proposed to solve the triatomic reactive time-dependent schrodinger equatio...
详细信息
The exact short time propagator, in a form similar to the Crank-Nicholson method but in the spirit of spectrally transformed Hamiltonian, was proposed to solve the triatomic reactive time-dependent schrodinger equation. This new propagator is exact and unconditionally convergent for calculating reactive scattering processes with large time step sizes. In order to improve the computational efficiency, the spectral difference method was applied. This resulted the Hamiltonian with elements confined in a narrow diagonal band. In contrast to our previous theoretical work, the discrete variable representation was applied and resulted in full Hamiltonian matrix. As examples, the collision energy-dependent probability of the triatomic H＋H2 and O＋O2 reaction are calculated. The numerical results demonstrate that this new propagator is numerically accurate and capable of propagating the wave packet with large time steps. However, the efficiency and accuracy of this new propagator strongly depend on the mathematical method for solving the involved linear equations and the choice of preconditioner.
近年来,单原子催化剂(Single Atom Catalyst,简称SAC)由于具有较高的原子利用率和特殊的催化活性,在多相催化领域中引起了人们广泛的关注。但尺寸的减小使低配位金属原子的表面自由能增大,极易发生团聚,从而导致催化剂失活,因此SAC的制...
详细信息
近年来,单原子催化剂(Single Atom Catalyst,简称SAC)由于具有较高的原子利用率和特殊的催化活性,在多相催化领域中引起了人们广泛的关注。但尺寸的减小使低配位金属原子的表面自由能增大,极易发生团聚,从而导致催化剂失活,因此SAC的制备是当前的挑战性问题。目前通常采用共沉淀或浸渍法等使金属单原子直接嵌入金属或金属氧化物等载体骨架中,但对实验的条件不好把握。最近,郑南峰课题组通过光化学方法在TiO2表面嫁接乙二醇,进而使单原子Pd负载在表面上,在催化加氢反应中表现出较
暂无评论