<trans-title>Effect of Different Alkali-assisted Deposition Precipitation Methods on the Durability of Three-way Catalysts</trans-title>

Jun FAN; Xue JIANG; Yi JIAO; Yusheng CHEN; Jianli WANG; Yaoqiang CHEN

doi:10.15541/jim20200357

Journal of Inorganic Materials, Volume. 36, Issue 6, 659(2021)

Effect of Different Alkali-assisted Deposition Precipitation Methods on the Durability of Three-way Catalysts

Jun FAN1... Xue JIANG2, Yi JIAO2,*, Yusheng CHEN1, Jianli WANG1,*, and Yaoqiang CHEN12 |Show fewer author(s)

Author Affiliations

¹1. College of Chemistry, Sichuan University, Chengdu 610064, China

²2. Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610064, China

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Figures & Tables(8)

1. XRD patterns of fresh and aged samples (a) and the comparison of their relative intensities of Pt (111) based on the strongest peak of support (b)

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2. Pt dispersion of samples measured by CO-chemisorption method (a) and FT-IR spectra of CO absorbed on the fresh (b) and aged (c) samples

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3. XPS spectra of O1s (a, d), Ce3d (b, e) and Pt4f (c, f) for fresh (a-c) and aged (d-f) samples

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4. H₂-TPR profiles of the fresh (a) and aged (b) samples

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5. Conversion curves of CO, NO, C₃H₈ and C₃H₆ over the fresh (a-d) and aged (e-h) samples, respectively

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Table 1.
Textural and structural parameters of the support and samples
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Table 1.
Textural and structural parameters of the support and samples
Samples Surface area/(m²•g^-1) Pore volume/(mL•g^-1) Average poreradius/nm
IM 60 0.23 7.5
UDP 63 0.22 7.5
ADP 61 0.23 7.7
IM-a 49 0.24 9.4
UDP-a 50 0.22 7.6
ADP-a 53 0.25 7.7
CZLP 64 0.25 8.7

Table 2.
Surface elemental state ratio derived from by XPS

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Table 2.
Surface elemental state ratio derived from by XPS

Sample	Pt⁰/Pt ratio	Pt²⁺/Pt ratio	Pt⁴⁺/Pt ratio	O_ads/O ratio	Ce³⁺/Ce ratio
IM	0	0.871	0.129	0.354	0.217
UDP	0	0.851	0.149	0.374	0.240
ADP	0	0.831	0.169	0.324	0.201
IM-a	0.302	0.698	0	0.329	0.195
UDP-a	0.421	0.579	0	0.350	0.187
ADP-a	0.234	0.766	0	0.336	0.214

Table 3.
Light-off (T₅₀) temperature and ΔT for three-way catalytic reactions over catalysts

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Table 3.
Light-off (T₅₀) temperature and ΔT for three-way catalytic reactions over catalysts

Sample	CO		NO		C₃H₈		C₃H₆
Sample	T₅₀/℃	ΔT /℃	T₅₀/℃	ΔT/℃	T₅₀/℃	ΔT/℃	T₅₀/℃	ΔT/℃
IM	174	-	260	-	269	-	234	-
UDP	142	-	259	-	273	-	228	-
ADP	187	-	277	-	284	-	254	-
IM-a	215	41	304	44	312	43	278	44
UDP-a	229	87	313	54	328	55	287	59
ADP-a	203	16	294	17	306	22	272	18

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Jun FAN, Xue JIANG, Yi JIAO, Yusheng CHEN, Jianli WANG, Yaoqiang CHEN. Effect of Different Alkali-assisted Deposition Precipitation Methods on the Durability of Three-way Catalysts[J]. Journal of Inorganic Materials, 2021, 36(6): 659

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Paper Information

Category: RESEARCH LETTER

Received: Jun. 29, 2020

Accepted: --

Published Online: Nov. 25, 2021

The Author Email: JIAO Yi (jiaoyiscu@163.com), WANG Jianli (wangjianli@scu.edu.cn)

DOI:10.15541/jim20200357

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Textural and structural parameters of the support and samples

Table 1. Textural and structural parameters of the support and samples

Table 2. Surface elemental state ratio derived from by XPS

Table 2. Surface elemental state ratio derived from by XPS

Table 3. Light-off (T50) temperature and ΔT for three-way catalytic reactions over catalysts

Table 3. Light-off (T50) temperature and ΔT for three-way catalytic reactions over catalysts

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Table 1.
Textural and structural parameters of the support and samples

Table 1.
Textural and structural parameters of the support and samples

Table 2.
Surface elemental state ratio derived from by XPS

Table 2.
Surface elemental state ratio derived from by XPS

Table 3.
Light-off (T₅₀) temperature and ΔT for three-way catalytic reactions over catalysts

Table 3.
Light-off (T₅₀) temperature and ΔT for three-way catalytic reactions over catalysts