The reducibility of highly stable Ni-containing species in catalysts derived from hydrotalcite-type precursors

被引：19
作者：
Pettiti, Ida [1 ]
Gazzoli, Delia [1 ]
Benito, Patricia [2 ]
Fornasari, Giuseppe [2 ]
Vaccari, Angelo [2 ]
机构：
[1] Univ Roma La Sapienza, Dip Chim, I-00185 Rome, Italy
[2] Univ Bologna, Alma Mater Studiorum, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, Italy
来源：
RSC ADVANCES | 2015年 / 5卷 / 100期
关键词：
LAYERED DOUBLE HYDROXIDES; PARTIAL OXIDATION; HYDROGEN-PRODUCTION; SOLID-SOLUTIONS; CARBON-DIOXIDE; METHANE; CH4; CO2; RH; COPRECIPITATION;
D O I：
10.1039/c5ra13863a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A study was conducted on the speciation and reducibility of Ni in catalysts derived from hydrotalcite-type (HT) precursors intercalated by silicates. Silicate and nickel contents in Ni/Mg/Al HT precursors varied and the products obtained by thermal decomposition in the 773-1373 K range were characterized. Sample properties were related to the amount of silicates and nickel. The former altered the formation of the spinel-type phase and decreased the ratio between MgO and MgAl2O4 phases in which the active species were stabilized. On the other hand, the Ni distribution depended on the Ni-loading. Ni-containing species in the spinel phase were more abundant for high Ni-loaded catalysts, and were readily reduced by H-2 treatment at 1023 K, whereas those in the Ni1-xMgxO solid solution remained partially unreduced.
引用
收藏
页码：82282 / 82291
页数：10
相关论文
共 59 条
[1]   Ni-Fe catalysts derived from hydrotalcite-like precursors for hydrogen production by ethanol steam reforming [J].
Abello, Sonia ;
Bolshak, Evgeniy ;
Montane, Daniel .
APPLIED CATALYSIS A-GENERAL, 2013, 450 :261-274
[2]   Effect of silicates on the structure of Ni-containing catalysts obtained from hydrotalcite-type precursors [J].
Albertazzi, S. ;
Basile, F. ;
Benito, P. ;
Del Gallo, P. ;
Fornasari, G. ;
Gary, D. ;
Rosetti, V. ;
Vaccari, A. .
CATALYSIS TODAY, 2007, 128 (3-4) :258-263
[3]   Bi-functional hydrotalcite-derived NiO-CaO-Al2O3 catalysts for steam reforming of biomass and/or tar model compound at low steam-to-carbon conditions [J].
Ashok, J. ;
Kathiraser, Y. ;
Ang, M. L. ;
Kawi, S. .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2015, 172 :116-128
[4]   Rh-Ni synergy in the catalytic partial oxidation of methane:: surface phenomena and catalyst stability [J].
Basile, F ;
Fornasari, G ;
Trifirò, F ;
Vaccari, A .
CATALYSIS TODAY, 2002, 77 (03) :215-223
[5]   Ni-catalysts obtained from silicate intercalated HTlcs active in the catalytic partial oxidation of methane: Influence of the silicate content [J].
Basile, F. ;
Benito, P. ;
Fornasari, G. ;
Gazzoli, D. ;
Pettiti, I. ;
Rosetti, V. ;
Vaccari, A. .
CATALYSIS TODAY, 2009, 142 (1-2) :78-84
[6]   Ni/Mg/Al anionic clay derived catalysts for the catalytic partial oxidation of methane - Residence time dependence of the reactivity features [J].
Basile, F ;
Basini, L ;
D'Amore, M ;
Fornasari, G ;
Guarinoni, A ;
Matteuzzi, D ;
Del Piero, G ;
Trifiro, F ;
Vaccari, A .
JOURNAL OF CATALYSIS, 1998, 173 (02) :247-256
[7]   Catalytic partial oxidation and CO2-reforming on Rh- and Ni-based catalysts obtained from hydrotalcite-type precursors [J].
Basile, F ;
Fornasari, G ;
Poluzzi, E ;
Vaccari, A .
APPLIED CLAY SCIENCE, 1998, 13 (5-6) :329-345
[8]   Silicate anion intercalated cobalt-aluminium hydrotalcite (CoAl-HT-Si): a potential catalyst for alcohol oxidation [J].
Baskaran, Thangaraj ;
Kumaravel, Raju ;
Christopher, Jayaraj ;
Sakthivel, Ayyamperumal .
RSC ADVANCES, 2014, 4 (22) :11188-11196
[9]   Silicate anion-stabilized layered magnesium-aluminium hydrotalcite [J].
Baskaran, Thangaraj ;
Kumaravel, Raju ;
Christopher, Jayaraj ;
Sakthivel, Ayyamperumal .
RSC ADVANCES, 2013, 3 (37) :16392-16398
[10]   Effect of post-synthesis microwave-hydrothermal treatment on the properties of layered double hydroxides and related materials [J].
Benito, P. ;
Herrero, M. ;
Labajos, F. M. ;
Rives, V. .
APPLIED CLAY SCIENCE, 2010, 48 (1-2) :218-227
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