High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO₂ nanotube arrays as interactive supports for Ir nanoparticles

Abstract

Developing ultraefficient electrocatalytic materials for the hydrogen evolution reaction (HER) with low content of expensive platinum group metals (PGMs) via low-energy-input procedures is the key to the successful commercialization of...

As a single atom Pd outperforms Pt as the most active co-catalyst for photocatalytic H2 evolution

“…For DFT, to model the studied SA catalysts, we adopted the previously used approach ( Lačnjevac et al., 2020 ) and considered SA metal trapping at the surface Ti 3+ -O v sites of anatase TiO 2 (001). Briefly, spin-unrestricted density functional theory (DFT) calculations, PBE-GGA approach ( Perdew et al., 1996 ), were performed using the Quantum ESPRESSO package ( Giannozzi et al, 2009 , 2017 ).…”

Charge Separated One-Dimensional Hybrid Cobalt/Nickel Phosphonate Frameworks: A Facile Approach to Design Bifunctional Electrocatalyst for Oxygen Evolution and Hydrogen Evolution Reactions

“…Over the past few decades, the excessive depletion of fossil fuels and severe environmental deterioration have stimulated intense research to develop renewable and sustainable clean energy conversion and storage devices composed of modern technologies such as water splitting, fuel cells, and metal–air batteries. − In these prospective techniques, the electrochemical splitting of water into hydrogen and oxygen offers a promising method for greener energy production with zero emission of greenhouse gases and can effectively fulfill the increasing clean and sustainable energy demand for global energy. − Generally, water splitting occurs in aqueous acidic or alkaline media comprising two half-reactions, viz., the cathodic hydrogen evolution reaction (HER) and the anodic oxygen evolution reaction (OER), both of which are vital to determining the overall efficiency of the water splitting process. − Although many superior state-of-the-art electrocatalysts have been explored to reduce the large overpotential and increase the reaction rate toward OER and HER, low abundance, scarcity, and high cost are major obstacles for their widespread commercial applicability. , …”

“…8−12 Although many superior stateof-the-art electrocatalysts have been explored to reduce the large overpotential and increase the reaction rate toward OER and HER, low abundance, scarcity, and high cost are major obstacles for their widespread commercial applicability. 13,14 Of late, the advancement of transition-metal-based materials such as oxides, nitrides, sulfides, selenides, hydroxides, phosphides, phosphates, and various composite materials are considered as excellent catalysts for boosting electrochemical water splitting performance by replacing precious platinum/ iridium catalysts. 15−24 The selection of flexible phosphonate groups along with incorporation of variable templated organoamines in hybrid metal phosphonate structures not only lead to a variety of structures but also serve as charge separators with modulated catalytic activity.…”

MnO2/TiO2 Nanotube Array-Coated Titanium Substrates as Anodes for Electrocatalytic Oxidation of As(III) in Aqueous Solution

“…As shown in Figure c and Table , MTNA-160-24 presents a higher corrosion potential (0.334 V vs Ag/AgCl) and especially a lower corrosion current density of 0.063 μA cm –2 , indicating that the MTNA-160-24 sample has a more efficient corrosion resistance. The ECSA was positively correlated with total capacitance ( C T ) , obtained from the slopes of the current density versus scan rates in the non-Faradaic double-layer region (Figure S5). The MTNA-160-24 anode presents a higher C T value of 15.1 μF (Figure d), thus resulting in the larger ECSA of MTNA-160-24.…”