Tunable nano-distribution of Pt on TiO2 nanotubes by atomic compression control for high-efficient oxygen reduction reaction

Nanotubular Pt-loaded TiO2 catalysts with vanadium-doping to enhance water–gas shift reaction activity

“…19–21 Furthermore, V-doping has been demonstrated to influence the binding energy between the support and loaded metal through lattice distortion and the formation of many defects, thereby enhancing the dispersion of the loaded metal. 27,45,57…”

“…[23][24][25] In particular, doping of vanadium (V) into TiO 2 increases the electron mobility (which affects oxygen vacancy formation) of the catalyst surface, facilitates the adsorption and dissociation of H 2 O, and thereby contributes to the increase in catalytic activity. [26][27][28][29][30][31] In the WGSR, the dissociation of H 2 O on supported metal catalysts is an essential step for the formation of CO 2 and H 2 by reacting with CO. This step is often considered the rate-determining step (RDS).…”

A Review of One‐Dimensional Nanomaterials as Electrode Materials for Oxygen Reduction Reaction Electrocatalysis

“…In addition to carbon nanotubes, including Ti nanotubes, [76] Si nanotubes, [77] and various alloy nanotubes have also been applied to ORR electrocatalysts for fuel cell cathodes, demonstrating high catalytic activity and excellent stability. Noh et al [76] prepared Pt/M-TiO 2 nanotubes (M=V, Nb and Cr) by loading Pt and transition metal elements on TiO 2 nanotubes. Their team also found that loading nano-platinum on the support requires roasting, which often leads to shrinkage of the support.…”

Anchoring Highly Dispersed Pt Electrocatalysts on TiOx with Strong Metal–Support Interactions via an Oxygen Vacancy-Assisted Strategy as Durable Catalysts for the Oxygen Reduction Reaction

“…40 Recently, Pt-loaded Mdoped TiO 2 (M = V, Nb, and Cr) nanotube catalysts were synthesized for ORR, which exhibited excellent ORR activity and stability. 41 The computational results revealed the crucial role of oxygen vacancies on ORR activity caused by M-doping. As a consequence, modulation of V o can significantly regulate the local electronic structure of Pt atoms, thus may significantly enhance the catalytic activity.…”

“…Furthermore, Mirshekari and Rice proposed that the V o on the TiO 2 surface can either dissociate the water molecules or oxygen molecules . Recently, Pt-loaded M-doped TiO 2 (M = V, Nb, and Cr) nanotube catalysts were synthesized for ORR, which exhibited excellent ORR activity and stability . The computational results revealed the crucial role of oxygen vacancies on ORR activity caused by M-doping.…”