Role of lattice oxygen in methane activation on Ni-phyllosilicate@Ce1-xZrxO2 core-shell catalyst for methane dry reforming: Zr doping effect, mechanism, and kinetic study

被引：152

作者：

Das, Sonali ^{[1
]}

Jangam, Ashok ^{[1
]}

Jayaprakash, Shanmukapriya ^{[1
]}

Xi, Shibo ^{[2
]}

Hidajat, Kus ^{[1
]}

Tomishige, Keiichi ^{[3
]}

Kawi, Sibudjing ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 119260, Singapore

[2] Inst Chem & Engn Sci, A STAR, 1 Pesek Rd, Singapore 627833, Singapore

[3] Tohoku Univ, Sch Engn, Dept Appl Chem, Aoba Ku, Aoba 6-6-07, Sendai, Miyagi, Japan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2021年 / 290卷

关键词：

Dry reforming of methane; Redox mechanism; Ceria-zirconia; Mechanism and kinetics; Methane activation; METAL-SUPPORT INTERACTIONS; CARBON-DIOXIDE; SYNTHESIS GAS; RARE-EARTH; SOLID-SOLUTIONS; NI; CO2; CEO2; CH4; SURFACE;

D O I：

10.1016/j.apcatb.2021.119998

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sandwich structured core-shell Ni-Phyllosilicate@Ce1-xZrxO2 catalysts with high coke resistance and activity are reported for DRM. Optimal Zr loading (x = 0.05 +/- 0.1) in the Ce1-xZrxO2 shell is observed to significantly increase the intrinsic activity for DRM. Extensive catalyst characterization using HRTEM, XRD, TPR, O-2-TPD, XPS, EXAFS and CO pulse chemisorption indicates that the enhancement in DRM activity upon Zr doping can be attributed to the increase in lattice oxygen mobility of the ceria-zirconia shell and stronger metal-support interaction with Ni. It is inferred from a rigorous kinetic and mechanism study that the lattice oxygen of Ce1-xZrxO2 not only participates in the oxidation of carbonaceous reaction intermediates but also facilitates the rate determining step of C-H bond dissociation of CH4 on Ni by an oxygen-mediated dissociation pathway. The involvement of lattice oxygen in methane activation and dissociation manifests in the higher DRM activity of the Zr-doped catalyst with maximum oxygen storage capacity.

引用

页数：15

共 70 条

[1] Kinetics, experimental and reactor modeling studies of the carbon dioxide reforming of methane (CDRM) over a new Ni/CeO2-ZrO2 catalyst in a packed bed tubular reactor [J].

Akpan, Enefiok ;

Sun, Yanping ;

Kumar, Prashant ;

Ibrahim, Hussam ;

Aboudheir, Ahmed ;

Idem, Raphael .

CHEMICAL ENGINEERING SCIENCE, 2007, 62 (15) :4012-4024

[2] Improving catalyst stability in nano-structured solar and fuel cells [J].

Asghar, Muhammad Imran ;

Lund, Peter D. .

CATALYSIS TODAY, 2016, 259 :259-265

[3] Some recent results on metal/support interaction effects in NM/CeO2 (NM: noble metal) catalysts [J].

Bernal, S ;

Calvino, JJ ;

Cauqui, MA ;

Gatica, JM ;

Larese, C ;

Omil, JAP ;

Pintado, JM .

CATALYSIS TODAY, 1999, 50 (02) :175-206

[4] Preparation, characterization and catalytic application of phyllosilicate: A review [J].

Bian, Zhoufeng ;

Kawi, Sibudjing .

CATALYSIS TODAY, 2020, 339 :3-23

[5] A Review on Bimetallic Nickel-Based Catalysts for CO2 Reforming of Methane [J].

Bian, Zhoufeng ;

Das, Sonali ;

Wai, Ming Hui ;

Hongmanorom, Plaifa ;

Kawi, Sibudjing .

CHEMPHYSCHEM, 2017, 18 (22) :3117-3134

[6] Highly carbon resistant multicore-shell catalyst derived from Ni-Mg phyllosilicate nanotubes@silica for dry reforming of methane [J].

Bian, Zhoufeng ;

Suryawinata, Ivan Yulian ;

Kawi, Sibudjing .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2016, 195 :1-8

[7] The state of zirconia supported platinum catalysts for CO2/CH4 reforming [J].

Bitter, JH ;

Seshan, K ;

Lercher, JA .

JOURNAL OF CATALYSIS, 1997, 171 (01) :279-286

[8] On the contribution of X-ray absorption spectroscopy to explore structure and activity relations of Pt/ZrO2 catalysts for CO2/CH4 reforming [J].

Bitter, JH ;

Seshan, K ;

Lercher, JA .

TOPICS IN CATALYSIS, 2000, 10 (3-4) :295-305

[9] Kinetic assessment of dry reforming of methane on Pt plus Ni containing composite of fluorite-like structure [J].

Bobrova, L. N. ;

Bobin, A. S. ;

Mezentseva, N. V. ;

Sadykov, V. A. ;

Thybaut, J. W. ;

Marin, G. B. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2016, 182 :513-524

[10] CO2 reforming of CH4 [J].

Bradford, MCJ ;

Vannice, MA .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1999, 41 (01) :1-42

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