单原子催化剂在电化学中的研究进展

目前单原子催化剂的研究呈现爆发式增长, 已然成为材料科学和催化领域的明星材料和研究热点. 前期报道的单原子催化剂研究主要针对某一个应用方向进行探讨, 较少研究催化剂的双功能或多功能应用. 近年来, 为了拓展单原子催化剂在更多领域和方向的应用, 具有双功能甚至多功能的单原子催化剂的设计开发备受关注. 本文综合评述了近年来具有双功能活性的单原子催化剂的研究进展, 重点介绍了其在电化学领域中的最新应用研究. 最后, 对具有双功能活性的单原子催化剂发展研究中存在的问题进行了简要分析, 并对未来发展前景进行了展望.     

New Zn(Ⅱ)/M(Ⅰ)(M=Na,K and Rb) Metal-organic Frameworks Based on 5-Methylisophthalic Acid Ligand:Syntheses,Structures and Fluorescent Property

Reactions of Zn(NO3)2·6H2O and MNO3(M = Na, K and Rb) with H2mip(H2mip = 5-methylisophthalic acid) in DMF(DMF = N,N′-dimethylformamide) resulted in the formation of novel heterometallic metal-organic frameworks(Me2NH2)[ZnM(mip)2](1: M = Na; 2: M = K; 3: M = Rb, mip = 5-methylisophthalate dianion for 1~3). These complexes belong to the monoclinic system, space group P2/c and have been fully characterized by satisfactory elemental analysis, FT-IR spectra, TGA and single-crystal X-ray diffraction. Single-crystal X-ray diffraction studies reveal that 1~3 are 3D isomorphic structures based on a trinuclear unit {ZnM2(?2-COO)2(?3-COO)2} and exhibit pcu topological net and blue fluorescence.     

A New Acentric Heterometallic Inorganic-organic Hybrid Framework [ZnK_2(m-BDC)_2(H_2O)_2]n: Fluorescent,NLO and Ferroelectric Properties

Solvothermal reactions of Zn(NO3)2·6H2O with isophthalic acid in the presence of potassium nitrate lead to an acentric three-dimensional(3D) hetero-metallic inorganic-organic hybrid framework [ZnK2(m-BDC)2(H2O)2]n(1, m-H2 BDC = benzene-1,3-dicarboxylic acid). The crystal was characterized by elemental analysis, IR spectroscopy, TGA and single-crystal X-ray diffraction analysis. Complex 1 is of orthogonal crystal system, acentric space group Cmc21 with a = 19.764(6), b = 19.948(6), c = 12.039(4) , V = 4746(3) 3, Z = 4, C32H20O19K4Zn2, Mr = 995.66, Dc = 1.393 g/cm3, F(000) = 2000 and μ = 1.426 mm-1. The final R = 0.0761 and wR = 0.1841. The crystal exhibits remarkable blue luminescence emissions with high quantum yield of 56.02% and displays modest powder SHG efficiency of about 0.7 times that produced by a potassium dihydrogen phosphate(KDP) powder. In addition, it also exhibits potential ferroelectric property.     

单原子催化剂在电催化CO2还原中的应用进展(英文)

电催化CO₂还原(ECR)是减少碳排放和促进碳循环的理想方法之一。单原子催化剂(SACs)由于其最大的原子利用率、优异的活性和选择性,已成为多相催化领域的前沿之一进以得到广泛应用。鉴于SACs在ECR领域的探索和应用,本文综述了基于SACs在ECR中应用的研究进展,并提出了SACs在ECR中应用的挑战和前景。具体介绍：(1)介绍了ECR的反应机理,(2) SACs的常用制备策略,(3) SACs在新型Zn-CO₂电池中的应用。最后,提出了SACs在ECR中所面临的挑战和机遇。