Qiong Sun

TL;DR: In this paper, earth-abundant metals are used to design economical and efficient electrocatalysts for cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction(OER).

TL;DR: This work provides a new strategy to advanced bifunctional catalysts for water electrolysis by constructing a hybrid catalyst constructed from N-doped CoS 2 nanoparticles on N,S-co-Doped graphene nanosheets (N-CoS 2 /G) using a facile method that exhibits excellent bifunctionsal activity.

TL;DR: F fluorine-anion-modification could be used as a general method to greatly increase the OER activity of NiAl LDHs and build weak metal-fluorine bonds, enhancing OER catalytic performance.

TL;DR: This work experimentally demonstrates the advantages of a dual anion modification strategy on improving catalytic activity and offers a new approach to design highly efficient and low-cost electrocatalysts for energy storage and conversion devices.

Abstract: Designing cost‐effective electrocatalysts for electrochemical water splitting to generate the hydrogen energy as a future energy source is pivotal. An excellent catalyst should show high catalytic activity for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under different pH conditions. Here, we highlighted a high‐efficient catalyst of Ir‐doped Ni(OH)2 nanosheets grown on Ni foam (Ir−Ni(OH)2/NF) as a high‐efficient catalyst for overall water splitting in both alkaline and neutral conditions via a simple one‐step hydrothermal strategy. The optimized Ir3−Ni(OH)2/NF shows superior HER and OER activity in neutral and alkaline electrolytes. The doped Ir ions can not only serve as catalytic sites for water dissociation, but also decrease the charge density of the adjacent bridge oxygen to facilitate HER kinetics. As a result, Ir3−Ni(OH)2/NF electrolyzer exhibits superior performance of a small potential of 1.64 V under neutral condition, which is obviously lower than that of a string of recently reported neutral‐pH electrocatalysts.