Mastering the D-Band Center of Iron-Series Metal-Based Electrocatalysts for Enhanced Electrocatalytic Water Splitting

Abstract

The development of non-noble metal-based electrocatalysts with high performance for hydrogen evolution reaction and oxygen evolution reaction is highly desirable in advancing electrocatalytic water-splitting technology but proves to be challenging. One promising way to improve the catalytic activity is to tailor the d-band center. This approach can facilitate the adsorption of intermediates and promote the formation of active species on surfaces. This review summarizes the role and development of the d-band center of materials based on iron-series metals used in electrocatalytic water splitting. It mainly focuses on the influence of the change in the d-band centers of different composites of iron-based materials on the performance of electrocatalysis. First, the iron-series compounds that are commonly used in electrocatalytic water splitting are summarized. Then, the main factors affecting the electrocatalytic performances of these materials are described. Furthermore, the relationships among the above factors and the d-band centers of materials based on iron-series metals and the d-band center theory are introduced. Finally, conclusions and perspectives on remaining challenges and future directions are given. Such information can be helpful for adjusting the active centers of catalysts and improving electrochemical efficiencies in future works.

First synthesis of RuSn solid-solution alloy nanoparticles and their enhanced hydrogen evolution reaction activity

“…This weakens the interaction between adsorbed H ads and the metal (RuSn) surface, thus facilitating the desorption of H ads from the surface of RuSn alloy NPs. [59][60][61] Therefore, the alloying of Sn with Ru enables the enhancement of the HER activity of Ru NPs.…”

Electrocatalytic Reactions for Converting CO2 to Value-Added Products: Recent Progress and Emerging Trends

“…Hence, currently, the best strategy is to use atmospheric CO 2 as a renewable feedstock to create a few chemical products with added value, such as light olefins, urea, formic acid, methanol, syngas, and (poly)carbonate [ 14 ]. A technique such as this will reduce the atmospheric CO 2 levels while producing fuels and industrial chemicals, reducing the reliance on traditional fossil fuels [ 15 , 16 ]. Therefore, several CO 2 reduction strategies, such as photochemical, electrochemical, thermochemical, and biochemical procedures, have been developed and extensively researched [ 17 , 18 ].…”

Fe2O3/Ni Nanocomposite Electrocatalyst on Cellulose for Hydrogen Evolution Reaction and Oxygen Evolution Reaction

“…"Hydrogen energy" is a clean synthetic fuel that provides energy without harmful emissions (hydrogen fuel cell-Anode: 2H 2 → 4H + + 4e − ; Cathode: 4H + + 4e − + O 2 → 2H 2 O; Overall: 2H 2 + O 2 → 2H 2 O + Energy). Electrochemical hydrogen generation via water splitting (WS) has received considerable interest among the numerous available hydrogen production techniques [1][2][3]. In WS, two half-reactions occur: the hydrogen evolution reaction (HER) at the cathode and the oxygen evolution reaction (OER) at the anode.…”