Polymorph nickel titanate nanofibers as bifunctional electrocatalysts towards hydrogen and oxygen evolution reactions

Abstract

Rationality between the morphology and composition of spinel and ilmenite polymorphs helps in the design of electrodes from nickel titanate nanofibers for bifunctional electrocatalytic water-splitting.

Exploring Optimal Water Splitting Bifunctional Alloy Catalyst by Pareto Active Learning

“…Water splitting has been attracting increasing attention owing to its possibility of substituting conventional fossil fuels and generating clean energy. [ 1–4 ] The overall reaction for water splitting is categorized into two half‐cell reactions: hydrogen evolution reaction (HER) [ 5–7 ] at the cathode and the oxygen evolution reaction (OER) [ 8–10 ] at the anode. Several studies have reported the improvement in the catalytic performance of each reaction; still a simplified system as well as improvement in the overall water splitting performance of a full cell have been continuously proposed.…”

“…Water splitting has been attracting increasing attention owing to its possibility of substituting conventional fossil fuels and generating clean energy. [1][2][3][4] The overall reaction for water splitting is categorized into two half-cell reactions: hydrogen evolution reaction (HER) [5][6][7] at the cathode and the oxygen evolution as a truly bifunctional catalyst is a daunting task. However, achieving the above goal solely by experiments is not feasible because of the enormous size of the design space, given the various components and compositions.…”

A low-content CeOx dually promoted Ni3Fe@CNT electrocatalyst for overall water splitting

“…6 Generally, electrocatalytic water splitting occurs in two core half-reactions: the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER), both of which have sluggish reaction kinetics and are highly dependent on high-performance but precious electrocatalysts with lower overpotentials and accomplish favorable energy-transfer efficiency for activation. 5,7 Currently, precious RuO 2 /IrO 2 and Pt are the benchmark electrocatalysts for the OER and HER, respectively. 8,9 However, their scarcity and high cost have hampered their large-scale application.…”