Breaking Volmer step limitation on NiO/PtNi heterojunctions via ATO-induced charge injection and interfacial modulation

Optimizing Intermediate Adsorption on Pt Sites via Triple-Phase Interface Electronic Exchange for Methanol Oxidation

“…Therefore, significant efforts have been devoted to heterogeneous interfacial engineering for designing highly efficient Pt-based electrocatalysts. − By selecting the appropriate active materials to couple with Pt metal, strong electronic and/or chemical interaction could be achieved at the interface, thus optimizing the adsorption ability for Pt sites. − Meanwhile, the additional active sites provided by coupled materials also allow separate reaction steps for the electrochemical process. , For MOR catalysis, the post-transition metal oxide of tin oxide (SnO 2 ) with high stability in acid/alkaline electrolyte media has been proved to modulate the electronic occupation of Pt d-orbits by constructing Pt/SnO 2 interface and thus optimizes the adsorption ability toward reaction intermediates on Pt sites. − Meanwhile, the SnO 2 with strong OH* adsorption ability also facilitates the formation of adsorbed OH* species via dissociative adsorption of water at low potentials and subsequently proceeds the bifunctional mechanism to oxidize and remove the adsorbed CO* on Pt sites. − However, due to the strong adsorption ability, the desorption of adsorbed OH* species from SnO 2 requires overcoming high energy barriers, which hinders the subsequent reaction with CO* and limits the removal of poisoning species on active sites, resulting in the insufficient antipoisoning ability of catalysts.…”

Dual roles of sub-nanometer NiO in alkaline hydrogen evolution reaction: breaking the Volmer limitation and optimizing d-orbital electronic configuration

“…38–40 Besides, the strong interaction at the interface between the TMOs and Pt can rearrange the electronic properties of the Pt sites, further accelerating the reaction kinetics in the A-HER. 41–43 Moreover, reducing the size of Pt nanoparticles has been proven to be a successful approach to improve Pt utilization efficiency and reduce Pt usage. 44–46 In fact, downsizing and stabilizing Pt nanoparticles, especially nanoclusters or even singles-atoms, are challenging due to thermodynamic instability and the severe operating conditions.…”

A/B-Site Management Strategy to Boost Electrocatalytic Overall Water Splitting on Perovskite Oxides in an Alkaline Medium

“…Perovskite oxides are materials with a general formula of ABO 3 , where the A-site atoms form 12-coordination structures with the surrounding oxygen, which are generally alkaline earth (such as Sr, Ba, Ca), rare earth (such as La, Pr, Sm, Ho), or alkali metal elements (such as Na, K), and the B-site atoms occupy octahedral sites and form BO 6 structures with O atoms, which are transition metals (such as Co, Fe, Ni) or noble metal (such as Ru, Pt, Ir) . Due to the adjustable phase/electronic structure and abundant oxygen vacancy, perovskite oxides are considered as novel and practical catalysts for both HER and OER in alkaline solution. − Especially, the perovskite-type PrCoO 3 with low cost and superior redox property acts as one of alternative catalysts for HER/OER. However, the single PrCoO 3 with weak interfacial defects limits its practical electrocatalytic performance …”