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Combinatorial assessment of the activity-composition correlation for several alloy nanoparticle catalysts / Xiajing Shi in Industrial & engineering chemistry research, Vol. 47 n°14 (Juillet 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4675–4682 Titre : Combinatorial assessment of the activity-composition correlation for several alloy nanoparticle catalysts Type de document : texte imprimé Auteurs : Xiajing Shi, Auteur ; Jin Luo, Auteur ; Peter N. Njoki, Auteur ; Yan Lin, Auteur Année de publication : 2008 Article en page(s) : p. 4675–4682 Note générale : Bibliogr. p. 4682 Langues : Anglais (eng) Mots-clés : Nanoparticle  catalysts;  Electrocatalytic  parameters;  Response  surface  approach Résumé : The screening of catalysts with desired catalytic activity and selectivity for electrocatalytic fuel cell reactions is a time-consuming process. One approach to address this problem is to apply combinatorial analysis techniques. In this paper, we present the results of an investigation of the application of systematic statistical analysis techniques such as analysis of variance (ANOVA) analysis and regression modeling for the development of effective screening methods of bimetallic and trimetallic nanoparticle catalysts. Based on several sets of experimental data from the chosen catalysts, empirical models derived from statistical analysis techniques were first built to fit the experiment results for each of the electrocatalytic parameters such as catalytic peak current, peak potential, Tafel slope and mass activities. These parameters were expressed as a function of catalyst component proportion variables and process variables. The adequacy of the chosen models is verified with residual analysis. The catalyst properties were also analyzed using a response surface approach. The statistical analysis results from the available experiment data provided useful information to aid the understanding of the relationship between the catalyst activities and compositions, which may provide guidance for experimental design toward discovery of catalysts with desired activity and selectivity. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800308h [article] Combinatorial assessment of the activity-composition correlation for several alloy nanoparticle catalysts [texte imprimé] / Xiajing Shi, Auteur ; Jin Luo, Auteur ; Peter N. Njoki, Auteur ; Yan Lin, Auteur . - 2008 . - p. 4675–4682. Bibliogr. p. 4682 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4675–4682 Mots-clés : Nanoparticle  catalysts;  Electrocatalytic  parameters;  Response  surface  approach Résumé : The screening of catalysts with desired catalytic activity and selectivity for electrocatalytic fuel cell reactions is a time-consuming process. One approach to address this problem is to apply combinatorial analysis techniques. In this paper, we present the results of an investigation of the application of systematic statistical analysis techniques such as analysis of variance (ANOVA) analysis and regression modeling for the development of effective screening methods of bimetallic and trimetallic nanoparticle catalysts. Based on several sets of experimental data from the chosen catalysts, empirical models derived from statistical analysis techniques were first built to fit the experiment results for each of the electrocatalytic parameters such as catalytic peak current, peak potential, Tafel slope and mass activities. These parameters were expressed as a function of catalyst component proportion variables and process variables. The adequacy of the chosen models is verified with residual analysis. The catalyst properties were also analyzed using a response surface approach. The statistical analysis results from the available experiment data provided useful information to aid the understanding of the relationship between the catalyst activities and compositions, which may provide guidance for experimental design toward discovery of catalysts with desired activity and selectivity. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800308h