刘超等报道了铜催化的芳香醛酮脱氧氢硼化反应构建苄基硼酸酯. 在该转化过程中, 使用廉价易得的铜作为催化剂, B2pin2 作为硼源, 醇质子作为氢源, 在 100℃的条件下, 芳香醛和芳香酮可直接转化成一级和二级苄基硼酸酯类化合物, 该反应操作简单, 反应体系可以兼容多种官能团. 见本期第 1725–1729 页.
Dr. Liu and coworkers reported a Cu-catalyzed deoxygenative gem-hydroborylation of aromatic aldehydes and ketones to access benzylboronic esters. In this transformation, widely available B2pin2 (pin = pinacol) was used as the boron source and alcoholic proton was applied as the hydride source. This direct and operationally simple protocol provides an effective approach for the synthesis of a variety of primary and secondary benzylboronates, in which broad functional group tolerance was presented. Read more about the article behind the cover on pages 1725–1729.
中国科学院固体物理研究所环境与能源纳米材料中心赵惠军教授课题组采用一步原位碳热还原法合成了高分散型Ni3Fe NPs@C 双金属催化剂, 其独特的合金形态具有高选择性直接加氢和转移加氢双功能催化特性, 能够高效地将生物质平台化合物乙酰丙酸转化为具有高附加值的γ-戊内酯. 见本期第1599–1607.
Prof. Zhao's group in the Centre for Environmental and Energy Nanomaterials, Institute of Solid State Physics, Chinese Academy of Sciences has fabricated a highly dispersible bimetallic Ni3Fe NPs@C catalyst via a facile one-step in situ carbothermal synthetic approach. Resulting from the unique bimetallic alloy structure, the Ni3Fe NPs@C catalyst possesses superior bifunctionality, capable of selectively converting biomass-derived levulinic acid to high value γ-valerolactone under both direct-hydrogenation and transferhydrogenation conditions. Read more about the article behind the cover on pages 1599–1607.
高艳安等报道了一种负电荷为骨架结构的离子型COF材料 (I-COF),通过简单的离子交换将Mn2+和[Mn (bpy)2]2+分别引入到了COF框架之中,得到的催化新材料在烯烃氧化制环氧化合物方面展示了良好的催化性能.见本期第1437–1444页.
Gao and coworkers in their article on pages 1437–1444 reported a negatively charged ionic COF (I-COF) and metallic Mn2+ and manganese(II) bipyridine complexes ([Mn(bpy)2]2+) were successfully incorporated as counter ions, respectively, via a simple ion exchange process. The resulting I-COFs can act as effective heterogeneous catalysts for epoxidation of different olefins to epoxides.
Wang and coworkers in their article on pages 1283–1293 reported the β-cyclodextrin-modified Cu/SiO2 catalyst was used to effectively synthesize methanol and ethylene glycol via the chemo-selective hydrogenation of ethylene carbonate derived from CO2. The residual carbon on the catalyst surface facilitates the maintenance of the synergistic effect between Cu0 and Cu+ species, simultaneously improves the stability of the catalyst.
谢在库教授团队从工业视角总结了煤制烃、油品质量升级以及绿色化工等能源化工领域重大工业催化成果, 并基于经济社会发展提炼相关催化问题, 从催化本质科学问题出发, 探讨了催化发展方向、路径与对策. 见本期第1147–1156 页.
The group of Prof. Xie attempts to summarize the catalysis achievements in fields like hydrocarbon production, oil-quality upgrading processes, and green chemical engineering from the industrial view and presents a discussion on the essence of the catalyst in the direction and the development strategy for catalysis based on economic and social demands. Read more about the review behind the cover on pages 1147–1156.
李映伟等报道了钙磷石对水氧化反应的促进作用. 在锌锰氧化物催化水氧化同时原位负载钙磷石, 其温和条件下光催化水氧化性能提升近10 倍. 见本期第1017–1026 页.
Prof. Yingwei Li and coworkers in their article on page 1017–1026 reported an efficient mimicry to the oxygen-evolving complex in photosystem II and discussed the promotion effect of brushite in water oxidation reaction. Brushite could be deposited on the zinc-manganese oxide catalyst simultaneously with the photocatalytic water oxidation reaction in the neutral phosphate-buffered aqueous solution containing [Ru(bpy)3]2+-Na2S2O8 and Ca2+, and is responsible for the largely enhanced water oxidation performance.
梁振兴等报道了一种二维花状金属钴用于高效催化CO2电还原合成甲酸, 图片展示了该反应是通过化学法构筑碳循环中的重要一步. 见本期第 914–919 页.
Liang et al. reported the usage of 2D flower-like cobalt to produce formic acid via electroreduction of CO2. The reaction, which is a key step to constitute the global carbon cycle, is shown in the picture and detailed information can be seen in the pages of 914–919.
董帆等报道了简易沉淀法一步合成MnOx/g-C3N4光热协同催化剂并将其应用于空气中NOx 的高效净化. 图片给出了MnOx/g-C3N 光热协同催化氧化NO的反应机理. 见本期第 619–629 页.
Dong and coworkers in their Article on pages 619–629 reported the MnOx/g-C3N4 composite as a synergistic photo-thermal catalyst via a simple precipitation method for efficient purification of NO in air. The picture shows the reaction mechanism of synergistic photo-thermal catalytic NO oxidation on MnOx/g-C3N4.
王志亮等基于光电催化分解水的三个关键步骤，即光吸收，电荷分离和表面反应，综述了近期该领域的发展进程. 图片显示出了光电极上发生光电反应的过程中三个基本过程需要相互密切协作以实现高效生产太阳能燃料 见本期第 369–378 页.
Wang and coworkers in their Article on pages 369–378 reviewed the recent progress on photoelectrochemcial (PEC) water splitting according to the three critical steps, including light absorption, charge separation and surface reaction. The picture shows the coordination of the three most important steps in PEC processes for achieving efficient solar fuel production.
李兰冬等报道了钴氧化物催化的反应控制羧酸选择加氢制醇过程， 即羧酸的存在可完全抑制醇的进一步转化. 钴氧化物还原为氧化亚钴可大幅度提升羧酸选择加氢催化活性. 见本期第 250–257 页.
Li and coworkers in their Article on pages 250–257 reported the selective hydrogenation of carboxylic acids to corresponding alcohols using earth-abundant cobalt oxides through a reaction-controlled catalysis process, namely the further reaction of alcohols completely hindered by the presence of carboxylic acids. The partial reduction of cobalt oxides to cobalt monoxide can dramatically enhance the catalytic activity for the selective hydrogenation of carboxylic acids.
刘俊等报道了一种金/PDPB/氧化石墨烯三元复合光催化剂. 氧化石墨烯和金纳米颗粒的引入促进了PDPB光生电子的迁移, 实现了光催化同步去除苯酚与六价铬离子. 见本期第 8–15 页.
Liu et al. in their Article on pages 8–15 reported a kind of photocatalyst of gold loaded graphene oxide/PDPB composite. The introduction of gold nanoparticles and graphene oxide nanosheets is beneficial to the transfer of photo-generated electrons of PDPB, which is good for the synchronous removal of Cr(VI) and phenol under the simulated solar light irradiation.
Yu and coworkers in their review article on page 1936–1955 reported a review on TiO2-based Z-scheme photocatalysts. The reaction mechanism of Z-scheme photocatalysts, recent research progress in their application and improved methods for photocatalytic performance enhancement are explored. Concluding remarks are presented, and some suggestions for the future development of TiO2-based Z-scheme photocatalysts are highlighted.
Li and coworkers in their Article on pages 1804–1811 reported the synergistic photocatalytic effect of porous g-C3N4 in the Cr(VI)/4-CP composite pollution system. Compared with single-component photocatalytic systems, the Cr(VI) reduction and 4-CP degradation efficiencies were simultaneously improved in the Cr(VI)/4-CP composite pollution system. The synergistic photocatalytic effect can be attributed to the accelerated redox reaction between Cr2O72– and 4-CP by electron transfer with porous g-C3N4.
唐水花等报道了以廉价无毒的核黄素作为碳氮源, 一步热解制得 Fe–N–C 催化剂并将其应用于燃料电池阴极氧还原反应. 图片给出了催化剂制备和氧还原反应过程以及催化剂形貌. 见本期第1668–1679 页.
Tang and coworkers in their Article on pages 1668–1679 reported a Fe–N–C catalyst via one–step pyrolysis in the presence of anhydrate iron chloride using cheap and nontoxic riboflavin as both carbon and nitrogen precursors. The picture shows the processes of catalyst preparation and oxygen reduction reaction, as well as the morphology of the catalyst.
2011 年张涛、李隽和刘景月教授合作并首次提出了单原子催化的概念. 该概念在随后几年内吸引了广泛的关注与研究, 现已成为多相催化领域的新前沿. 本期单原子催化专刊共收集23 篇文章, 包括1 篇观点、6 篇视角、2 篇综述、2 篇小综述和12 篇研究论文.
The concept of single-atom catalysts (SAC), defined as isolated atoms individually dispersed on a solid materials, was first raised in 2011 in a seminal work produced from the cooperation of Professors Tao Zhang, Jingyue (Jimmy) Liu and Jun Li. This concept attracted considerable interests in the following years and initiated extensive investigation and has now been one of the frontiers in heterogeneous catalysis. This special issue collects 23 papers with 1 viewpoint, 6 perspectives, 2 full reviews, 2 minireviews and 12 original research papers.
尹利利等报道了一种可用于高效光催化降解异丙醇的石墨烯/电气石/二氧化钛纳米复合结构. 石墨烯的优异电子传导性质和电气石纳米颗粒表面的静电场有利于二氧化钛中光生电子和孔穴的分离和传递, 从而大幅度提高了该纳米复合体系的光催化性能. 见本期第1307–1314 页.
Yin and coworkers in their Article on pages 1307-1314 reported a graphene/tourmaline/TiO2 nanocomposite system for efficient photocatalytic degradation of 2-propanol.The superior electronic conductivity of graphene and the electrostatic field on the surface of tourmaline nanoparticles are believed to facilitate the separation and transportation of electrons and holes photogenerated in TiO2,thus significantly enhancing the photocatalytic activity of the graphene/ tourmaline/TiO2 nanocomposite system.