Factorial Optimization of CoCuFe-LDH/Graphene Ternary Composites as Electrocatalysts for Water Splitting

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер unknown

Опубликована: Сен. 12, 2024

The layered double hydroxides (LDHs) have demonstrated significant potential as non-noble-metal electrocatalysts for the hydrogen evolution reaction (HER) and oxygen (OER). Their unique compositional structural properties contribute to their efficiency stability catalysts. In this study, CoCuFe-LDH composites were grown on graphene (G) via a cost-effective straightforward one-step hydrothermal process. A 2-level full-factorial model was employed determine impact of Co (1.5, 3, 4.5 mmol) (10, 30, 50 mg) concentrations onset OER HER, which chosen response variables. HER activity variabilities assessed in triplicate using

Язык: Английский

Conjugated Coordination Polymer Aerogels with Increased Accessibility of Well‐Defined Single‐Atom Metal Sites as a New Paradigm of Electrocatalysts

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 24, 2025

Developing high-performance single-atom catalysts (SACs) with maximum metal utilization efficiency is of significance, which presents enormous potentials to be extensively applied. It desired yet challenging elaborately tailor the coordination structures active sites in SACs and simultaneously enable sufficient accessibility these reactants. Here, a facile general strategy prepare conjugated polymer aerogels (CCPA) porous architectures that can markedly increase their elaborately-tailored sites, as new electrocatalyst paradigm fully present both structural advantages aerogel materials, reported. Taking nickel (Ni) an example, Ni-based CCPA (Ni-CCPA) its counterpart Ni-CCP non-aerogel feature are studied proof-of-concept case. Electrochemical measurements show that, relative Ni-CCP, Ni-CCPA exhibits appreciably higher performance toward alkaline oxygen evolution reaction (OER). Both experimental results theoretical simulations unravel improved OER arises from accelerated OH- diffusion within architecture enhanced concentration near highly exposed at high-curvature surfaces localized electric fields. Importantly, evidenced by Cu-CCPA Zn-CCPA examples, such promisingly applied targeted various catalytic reactions beyond.

Язык: Английский

Ion liquid treatment for high-performance NiSe/CNT water electrolysis catalyst

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 94, С. 774 - 781

Опубликована: Ноя. 15, 2024

Язык: Английский