Publications by authors named "Ziran Ma"

Nitrogen fertilizer increases agricultural yields but increases economic costs and causes a series of environmental problems. Arbuscular mycorrhizal fungi (AMF) have the potential to be used as biological fertilizer. However, the influence of nitrogen form on plant growth responsiveness to AMF inoculation is poorly understood.

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Heat distribution and good adhesion of the washcoat on monolith catalysts are critical to improving catalytic activity and long-term stability. Compared with cordierite, metal foam presents a high thermal conductivity coefficient. Also, the availability of "washcoat" grown on metal substrates opens the door to eliminating the problem of coating peeling.

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Pd/AlO catalysts modified by different chemical elements (Mg, Si, Ce, and Zr) were tested for methane (CH) catalytic combustion, and PdO nanoparticles loaded on modified AlO were systematically studied. These conditions assess the carrier effects of Pd/AlO and acid strength influences on CH combustion. We observed carrier effects on activation energy through tuning Pd 3d binding energies (BEs) and on pre-exponential factors (A) through Pd dispersion and acidity on supports.

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Supported MnO is useful in achieving high dinitrogen selectivity at low temperature during ammonia-selective catalytic reduction (SCR). However, its controlled synthesis is challenging when the supporting material is the conventional pure silicon SBA-15 mesoporous molecular sieve. Here we show that silicon and aluminium in fly ash, the solid waste produced by coal-fired power plants, can be used to synthesize an Al-SBA-15 mesoporous molecular sieve support, which can guide the growth of MnO in the as-synthesized Fe-Mn/Al-SBA-15 NH-SCR catalyst.

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A series of vanadium based catalysts (VxMn(4-x)Mo3Ce3/Ti) with different vanadium (x wt.%) and manganese ((4-x) wt.%) contents have been prepared by the wet impregnation method and investigated for selective catalytic reduction (SCR) of NO by NH in the presence of 8 vol.

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The catalytic performance of Hg oxidation over vanadium-based SCR catalysts modified by different addition amounts of CuO was investigated. All catalysts were prepared by impregnation method and characterized. The 7% Cu/VWTi exhibited high Hg oxidation as well as a desired NO removal efficiency at 280-360 °C.

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A series of WO3/CeO2 (WO(x)/CeO2) catalysts were synthesized by wet impregnation of ammonium metatungstate on a CeO2 support. The resulting solid acid catalysts were characterized by X-ray diffraction (XRD), UV-Vis spectroscopy (UV-Vis), Raman spectroscopy (Raman), in-situ Fourier transform infrared spectroscopy (in-situ FT-IR) of ammonia adsorption, NH3-TPD, H2 temperature-programmed reduction (H2-TPR), NH3/NO oxidation and activity measurements for NO(x) reduction by NH3 (NH3-SCR). The results show that polytungstate (WO(x)) species are the main species of tungsten oxide on the surface of ceria.

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