caa a22 4500 47584338X CHVBK 20180406123907.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1023/A:1027262822942 doi (NATIONALLICENCE)springer-10.1023/A:1027262822942 Electrochemical characterization of two different framework Ti(IV) species in Ti/Beta zeolites in contact with solvents [Elektronische Daten] [Antonio Doménech, Avelino Corma, Hermenegildo García, Susana Valencia] Five Ti/Beta zeolites prepared by the conventional hydroxide procedure or by using fluoride as mineralizer have been studied by cyclic voltammetry and pulse voltammetry. Three peak couples (AA′, BB′ and CC′) were recorded. The AA′ peak was due to Ti atoms leached to the solution. Peak BB′ is relatively insensitive to the electrolyte salt, while the reduction potential of CC′ decreases progressively from perchlorate or nitrate to chloride and bromide. This suggests the presence of two framework Ti populations, one less prone to expand its coordination number (proposed to be Ti(OSi≡)4) and other Ti atoms that coordinate with ligands within the short timescales of the electrochemical measurements (either (≡SiO)3TiOH or (≡SiO)2Ti(OH)2 titanols). Kluwer Academic Publishers, 2000 electrochemistry of zeolites nationallicence titanium/Beta nationallicence titanium sites nationallicence Doménech Antonio Departamento de Química Analítica, Facultad de Ciencias Químicas, Universidad de Valencia, Dr. Moliner 50, 46100 Burjasot, Valencia, Spain aut Corma Avelino Instituto de Tecnología Química, Universidad Politécnica de Valencia, Apartado 22012, 46410, Valencia, Spain aut García Hermenegildo Instituto de Tecnología Química, Universidad Politécnica de Valencia, Apartado 22012, 46410, Valencia, Spain aut Valencia Susana Instituto de Tecnología Química, Universidad Politécnica de Valencia, Apartado 22012, 46410, Valencia, Spain aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 11-12/1-4(2000-04-01), 401-407 1022-5528 11-12:1-4<401 2000 11-12 11244 https://doi.org/10.1023/A:1027262822942 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1027262822942 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Doménech Antonio Departamento de Química Analítica, Facultad de Ciencias Químicas, Universidad de Valencia, Dr. Moliner 50, 46100 Burjasot, Valencia, Spain aut NATIONALLICENCE 700 1- Corma Avelino Instituto de Tecnología Química, Universidad Politécnica de Valencia, Apartado 22012, 46410, Valencia, Spain aut NATIONALLICENCE 700 1- García Hermenegildo Instituto de Tecnología Química, Universidad Politécnica de Valencia, Apartado 22012, 46410, Valencia, Spain aut NATIONALLICENCE 700 1- Valencia Susana Instituto de Tecnología Química, Universidad Politécnica de Valencia, Apartado 22012, 46410, Valencia, Spain aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 11-12/1-4(2000-04-01), 401-407 1022-5528 11-12:1-4<401 2000 11-12 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer