Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (5): 1371-1378.DOI: 10.1016/S1872-2067(21)63877-9
• Articles • Previous Articles
Wei Xionga(), Min Zhoua, Hao Lib(), Zhao Dingc, Da Zhangd, Yaokang Lve
Received:
2021-05-25
Accepted:
2021-06-18
Online:
2022-05-18
Published:
2022-03-23
Contact:
Wei Xiong, Hao Li
Supported by:
Wei Xiong, Min Zhou, Hao Li, Zhao Ding, Da Zhang, Yaokang Lv. Electrocatalytic ammonia synthesis catalyzed by mesoporous nickel oxide nanosheets loaded with Pt nanoparticles[J]. Chinese Journal of Catalysis, 2022, 43(5): 1371-1378.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63877-9
Catalysts | Pt0/% | Ptδ+ (Pt2+, Pt4+)/% |
---|---|---|
Pt/NiO-1 | 50.0 | 50.0 |
Pt/NiO-2 | 46.7 | 53.3 |
Pt/NiO-3 | 51.7 | 49.3 |
Table 1 Surface contents of Pt0 and Ptδ+ species in samples.
Catalysts | Pt0/% | Ptδ+ (Pt2+, Pt4+)/% |
---|---|---|
Pt/NiO-1 | 50.0 | 50.0 |
Pt/NiO-2 | 46.7 | 53.3 |
Pt/NiO-3 | 51.7 | 49.3 |
Fig. 3. (a) LSV curves of Pt/NiO-1, Pt/NiO-2, and Pt/NiO-3 in N2-saturated 0.1 mol/L Na2SO4; LSV curves of Pt/NiO-1 (b), Pt/NiO-2 (c), and Pt/NiO-3 (d) both measured in an N2-saturated (red line) and Ar-saturated (black line) 0.1 mol/L Na2SO4.
Fig. 4. Electroreduction of N2 to NH3 on Pt/NiO-NSs electrocatalysts. (a) UV-vis absorption spectra of NH3; (b) Corresponding NRR performance of different electrocatalysts at -0.2 V vs. RHE.
Fig. 5. (a) UV-vis absorption spectra of Pt/NiO-2 in N2-saturated 0.1 mol/L Na2SO4 at various potentials; (b) corresponding NH3 yields and FEs of Pt/NiO-2 for NRR; (c) Corresponding UV-vis absorption spectra of N2H4.
Catalyst | Electrolyte | Yield (μg h-1 mg-1cat.) | FE (%) | Ref. |
---|---|---|---|---|
Pd | 0.1 mol/L PBS | 4.5 | 8.2 | [34] |
Pd-Ag-S | 0.1 mol/L Na2SO4 | 9.73 | 18.41 | [35] |
pAu/NF Pd-Co/CuO | 0.1 mol/L Na2SO4 0.1 mol/L KOH | 9.42 10.04 | 13.36 2.16 | [36] [37] |
Mn3O4@rGO | 0.1 mol/L Na2SO4 | 17.4 | 3.52 | [38] |
N-C@NiO/GP La2O3 Fe2O3 Cr2O3-rGO CoO QD/RGO CoP HNC F-SnO2/CC | 0.1 mol/L HCl 0.1 mol/L Na2SO4 0.1 mol/L Na2SO4 0.1 mol/L HCl 0.1 mol/L Na2SO4 1.0 mol/L KOH 0.1 mol/L Na2SO4 | 14.022 17.04 15.9 33.3 21.5 10.78 19.3 | 30.43 4.76 0.94 7.3 8.3 7.36 8.6 | [39] [40] [41] [42] [43] [44] [45] |
Pt/NiO | 0.1 mol/L Na2SO4 | 20.59 | 15.56 | This work |
Table 2 NRR performance comparison of other electrocatalysts.
Catalyst | Electrolyte | Yield (μg h-1 mg-1cat.) | FE (%) | Ref. |
---|---|---|---|---|
Pd | 0.1 mol/L PBS | 4.5 | 8.2 | [34] |
Pd-Ag-S | 0.1 mol/L Na2SO4 | 9.73 | 18.41 | [35] |
pAu/NF Pd-Co/CuO | 0.1 mol/L Na2SO4 0.1 mol/L KOH | 9.42 10.04 | 13.36 2.16 | [36] [37] |
Mn3O4@rGO | 0.1 mol/L Na2SO4 | 17.4 | 3.52 | [38] |
N-C@NiO/GP La2O3 Fe2O3 Cr2O3-rGO CoO QD/RGO CoP HNC F-SnO2/CC | 0.1 mol/L HCl 0.1 mol/L Na2SO4 0.1 mol/L Na2SO4 0.1 mol/L HCl 0.1 mol/L Na2SO4 1.0 mol/L KOH 0.1 mol/L Na2SO4 | 14.022 17.04 15.9 33.3 21.5 10.78 19.3 | 30.43 4.76 0.94 7.3 8.3 7.36 8.6 | [39] [40] [41] [42] [43] [44] [45] |
Pt/NiO | 0.1 mol/L Na2SO4 | 20.59 | 15.56 | This work |
Fig. 6. (a) NH3 yields of Pt/NiO-2 in N2- and Ar-saturated 0.1 mol/L Na2SO4 solutions, N2-saturated 0.1 mol/L Na2SO4 solution at open circuit, and N2-saturated 0.1 mol/L Na2SO4 solution at blank carbon paper; (b) Chronoamperometry test results of Pt/NiO-2 at various potentials; (c) Cycling test results of Pt/NiO-2 at -0.2 V vs. RHE.
Fig. 7. Calculated PDOS of Pt(111) (a) and Pt nanocluster (b) supported on NiO(100). Insets show the top and side views of the DFT-optimized Pt/NiO(100) structure. Grey, green, and red spheres represent Pt, Ni, and O, respectively.
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