Porous spinel-type transition metal oxide nanostructures as emergent electrocatalysts for oxygen reduction reactions

Abstract

Porous spinel-type transition metal oxides (PS-TMOs) nanocatalysts comprising two kinds of metals (denoted as AxB3-xO4, where A, B = Co, Ni, Zn, Mn, Fe, V, Sm, Li, and Zn) have...

Challenges and Opportunities of Transition Metal Oxides as Electrocatalysts

“…Many TMO catalysts can potentially be stable under highly oxidizing conditions. Several TMOs (especially, Mn‐ and Fe‐based TMOs) are prone to ORR, [10] which are beneficial to promote the hydrogen fuel cell performance. Meanwhile, advantages such as low‐cost, good stability at high potentials, and high activity make them promising in potential commercialization.…”

Ternary PdNiO nanocrystals-ornamented porous CeO2/onion-like carbon for electrooxidation of carbon monoxide: unveiling the effect of supports and electrolytes

“…modifies its d-band centre close to the Fermi level that enable quick CO adsorption/activation on the active sites, besides the spillover effect that generates reactive oxygenated species (i.e., OH radicals) from H 2 O splitting, [36][37][38][39][40][41] which are advantageously utilized for efficient electrocatalysis. 25,[42][43][44][45][46] For example, the addition of CeO 2 to Pd/OLC (Pd-CeO 2 /OLC) significantly increased its hydrogen oxidation reaction (HOR) electrocatalytic activity by 13.2 and 15.0 times compared with Pd/OLC and Pd/CB, respectively, due the induced defects and modified electronic structure of Pd/OLC interfaced by CeO 2 . 47 Hence, CeO 2 /OLC composite support enables great interfacial interaction with Pd for great electrocatalysis.…”

S/N codoped carbon nanotubes as an efficient ORR electrocatalyst for zinc–air batteries

“…1,2 It is worth noting that the oxygen reduction reaction (ORR) is one of the important electrochemical reactions, which requires high energy barrier and high over potential drive, which will greatly reduce the operating efficiency of the system. [3][4][5] At present, some precious metal materials play an excellent catalytic role in these electrochemical reactions, such as Pt based materials. [6][7][8] Although these catalysts have very high catalytic performance, they have the disadvantages of high cost, poor performance stability, scarce reserves, easy poisoning and so on.…”