Yaqin Hou's research while affiliated with Chinese Academy of Sciences and other places

... From the characteristic peaks of pyridine nitrogen and pyrrole nitrogen in the N 1s spectrum, we can infer the diversity of bonding modes between N and C. AgNi/BCN-400 contains the highest pyrrole nitrogen ratio, indicating that the catalytic oxidation activity of the catalyst for benzene at room temperature may be related to pyrrole nitrogen. Pyrrole nitrogen, which has a unique electronic structure, can effectively promote the adsorption of reactant molecules [49,50]. ...

... This may be because the in situ doped Ru was not only deposited on the surface of the catalyst but also dispersed inside the spinel, which resulted in higher activity and better stability. In a word, the Ru@CoMn2O4 catalyst displayed excellent catalytic activity, even better than some other noble-metal catalysts reported in recent years [27][28][29][30][31][32][33], indicating that the Ru@CoMn2O4 catalyst has potential for practical industrial applications in alkane removal. The catalyst activities in some of the relevant literature are shown in Table 1. ...

... Recently, Li et al. [94] further investigated the reaction scheme for NO and Hg 0 removal over Co-Mn/TiO 2 , which displayed high mercury oxidation efficiency of 100% and NO conversion of 99% at 180 • C. Hg 0 vapor hardly impacted NO reduction. NO and O 2 greatly promoted mercury oxidation, whereas NH 3 inhibited mercury oxidation. ...

... The N atom doping can form porous carbon-containing pyridine nitrogen, pyrrole nitrogen and graphite nitrogen basic sites. The formation of these basic sites can improve the CO 2 adsorption performance [37][38][39]. Figure 7 shows the calculated and plotted adsorption enthalpy curves of ZAC-800, ZAC-900, and ZAC-1000 samples at 273 K and 298 K. The adsorption enthalpies of CO 2 at near zero were 33.64 kJ/mol, 32.24 kJ/ mol, and 32.82 kJ/mol, respectively, and these adsorption enthalpy values were significantly higher than some MOFs Content courtesy of Springer Nature, terms of use apply. ...

... Our previous research showed that δ-MnO 2 has plentiful inherent hydroxyl groups, which can efficiently attack the aldehyde group of furfural to generate geminal diol intermediates. Moreover, the oxygen species arising from the oxygen activation and the inherent hydroxyl groups are helpful to break C -H bond of geminal diol to produce furoic acid [19,20]. These properties of δ-MnO 2 help it show similar catalytic performance to noble metals under base-free conditions. ...

... However, the catalytic activity of transition metal oxides needs to be further improved compared with the excellent performance of noble metal catalysts [2]. Various strategies have been adopted to improve the catalytic performance of transition metal oxides, such as size control [3], crystal plane or morphology modulation [4], element doping, surface defect fabrication [5], pore introduction [6] and compound recombination [7]. For example, atomically dispersed Co catalysts anchored in porous nitrogen-doped carbon (Co SA -N-C) showed outstanding performance in removing low concentrations of HCHO at room temperature [8]. ...

... Both catalysts exhibit a distinct reduction peak at 470-480 • C, which corresponds to the reduction of Mn 3+ to Mn 2+ [37,38]. This reduction peak can be attributed to the Mn 3+ in bulk phase of spinel, as confirmed by the previous XRD and SAED results. ...

... [25] Moreover, Xing et al. reported that Ag doping into MnO 2 increased the content of electrophilic oxygen, which was beneficial to the selective oxidation of hydrocarbons. [26,27] Compared with undoped MnO 2 , metal-doped MnO 2 demonstrates unique chemical properties and has different reaction pathways; [28,29] these effects originate from partially positive charges on doping metal sites, influencing their electronic densities, the interaction between active metal and support, and reaction intermediates and metal. Achieving a suitable interaction between active metal and support, or reactants and catalyst, the catalytic system may be able to overcome the activityselectivity trade-off in selective oxidation reactions. ...

... 33 In the range of 2000-1000: 1764 cm −1 represented the signal of CO of EA; peaks at 1438 and 1373 cm −1 belonged to the C-H of methylene and methyl species, respectively; the peaks at 1240 and 1056 cm −1 were attributable to the C-O-C stretching vibration peak. [34][35][36] The typical vibrations at 2993, 2890, 1762, and 1056 cm −1 were observed immediately, and the intensity of these peaks increased with increasing time of EA adsorption. The peak intensity at 1371 cm −1 decreased gradually with the extension of adsorption time, indicating that the adsorption forms of EA on CBC adsorbents were rearranged due to the intermolecular competitive adsorption during the transformation process from single-layer to multilayer adsorption. ...

... Nanomaterials have had a broader range of applications and use in various fields in recent years. Some researchers have studied the use of nanomaterials for catalytic activity for oxidation [24][25][26], photocatalytic activity [27][28][29], a high-performance electrode for supercapacitors [30][31][32][33], solid oxide fuel cells [34], amperometric detection of hydrogen peroxide [35] and catalytic ozonation membrane reactor [36][37][38]. These examples confirm that CuMn2O4 spinel oxide nanomaterial is environmentally supportive for living organisms and extremely useful in different fields. ...