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. 2017 Oct 12;7(1):13044.
doi: 10.1038/s41598-017-13616-5.

Efficient reduction of nitric oxide using zirconium phosphide powders synthesized by elemental combination method

Zhen Li  1 , Ning Chen  1 , Jigang Wang  1 , Peishen Li  1 , Ming Guo  1 , Qiang Wang  2 , Chunhong Li  3 , Changzheng Wang  4 , Tao Guo  5 , Shaowei Chen  6
Affiliations

Efficient reduction of nitric oxide using zirconium phosphide powders synthesized by elemental combination method

Zhen Li et al. Sci Rep. .

Abstract

Zirconium phosphide (ZrP) powders were synthesized by elemental combination method via the direct reaction of zirconium powders with red phosphorus, and characterized by XRD, SEM, XPS, XRF, SAED and TEM measurements. The obtained ZrP powders were found to exhibit apparent activity in the ready eliminateion of nitric oxide (NO) via facile redox reactions, and the elimination dynamics was evaluated within the context of various important experimental parameters, such as reaction temperature and gas concentration. At a fixed amount of ZrP powders, an increasing amount of NO would be eliminated with increasing reaction temperature, and complete conversion of NO to N2 could be reached in the range of 700 to 800 °C. The addition of NH3 also facilitated NO elimination at a fixed reaction temperature. Furthermore, of the products of the elimination process, zirconia (ZrO2) powder is a kind of biocompatible material, red phosphorus can be used to produce safety matches, organophosphorous pesticide and phosphor bronze, and the produced N2 might be collected and used as a protective gas or be converted into liquid nitrogen for other purposes.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Figure 1
Figure 1
XRD patterns and Crystal structure of the ZrP samples. (a) XRD patterns of the ZrP prepared at different temperatures (b) Crystal structure of ZrP. The red and green balls represent phosphorus and zirconium atoms, respectively.
Figure 2
Figure 2
SEM and TEM analyses of the ZrP sample. (a) and (b) SEM images of the ZrP sample (c) TEM images of the as-prepared ZrP (d) HRTEM images of the as-prepared ZrP. Inset to (d) is the electron-diffraction patterns.
Figure 3
Figure 3
XPS analyses of the ZrP sample. (a) survey spectrum (b) Zr3d region (c) P2p region.
Figure 4
Figure 4
Reductions of NO at 650 °C (a), 700 °C (b), 750 °C (c) and 800 °C (d) (three curves in each Figure represented the ZrP samples synthesized at different temperatures, i.e. 800, 900 and 1000 °C, respectively).
Figure 5
Figure 5
Reaction of NO with ZrP at different temperatures (a), Effect of NH3 concentration on the elimination of NO (b).
See this image and copyright information in PMC

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