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Photoelectrochemical Water Oxidation
In article number 2304376, Kin Ho Lo, Hui Pan, and co‐workers report a metal‐insulator‐semiconductor (MIS) structure photoanode (n‐Si/SiOx/CoOx‐Mo) to show a high photovoltage of 650 mV, saturation current density of 27.6 mA cm−2, and fill factor of 0.62 in 1.0 M K3BO3 because the energy barrier, charge transfer, reaction kinetics, and active sites are dramatically...
Green hydrogen is considered to be the key for solving the emerging energy and environmental issues. The photoelectrochemical (PEC) process for the production of green hydrogen has been widely investigated because solar power is clean and renewable. However, mass production in this way is still far away from reality. Here, a Si photoanode is reported with CoOx as co‐catalyst for efficient water oxidation...
Two‐dimensional low‐melting‐point (LMP) metal nanocrystals are attracting increasing attention with broad and irreplaceable applications due to their unique surface and topological structures. However, the chemical synthesis, especially the fine control over the nucleation (reduction) and growth (crystallization), of such LMP metal nanocrystals remains elusive as limited by the challenges of low standard...
Developing efficient and durable electrocatalysts for the oxygen evolution reaction (OER) in proton exchange membrane (PEM) electrolyzers represents a significant challenge. Herein, the cobalt‐ruthenium oxide nano‐heterostructures are successfully synthesized on carbon cloth (CoOx/RuOx‐CC) for acidic OER through a simple and fast solution combustion strategy. The rapid oxidation process endows CoO...
Oxygen Evolution and Reduction Reactions
The spin effects in oxygen evolution/reduction reaction, and advances in design, characterization and mechanisms of spin catalyst are highlighted in article number 2205638 by Hongchao Liu, Hui Pan, and co‐workers. The factors that affect spin are also discussed in detail. Some general rules are obtained, and perspectives on the study of spin catalysts are given...
Searching for high effective catalysts has been an endless effort to improve the efficiency of green energy harvesting and degradation of pollutants. In the past decades, tremendous strategies are explored to achieve high effective catalysts, and various theoretical understandings are proposed for the improved activity. As the catalytic reaction occurs at the surface or edge, the unsaturated ions...
As an emerging energy‐harvesting technology, the triboelectric nanogenerator (TENG) is considered a powerful driving force toward the new‐era of Internet of Things and artificial intelligence, but its output performance is dramatically influenced by environmental humidity. Herein, a direct current TENG (DC‐TENG) based on the triboelectrification effect and electrostatic breakdown is reported to address...
Activated porous carbons (APCs) are traditionally produced by heat treatment and KOH activation, where the production time can be as long as 2 h, and the produced activated porous carbons suffer from relatively low specific surface area and porosity. In this study, the fast high‐temperature shock (HTS) carbonization and HTS‐KOH activation method to synthesize activated porous carbons with high specific...
The transition‐metal nitrogen‐carbon (M‐N‐C) catalysts, as one of the optimal bifunctional oxygen catalysts, are vital for cathodic oxygen electrode of Zn‐based air flow batteries (ZAFBs). However, chemical complexity of M‐N‐C catalysts prepared via the traditional pyrolytic process increases the difficulties of precise control toward configuration and repeatability, especially in large‐scale synthesis...
Perovskite oxides are studied as electrocatalysts for oxygen evolution reactions (OER) because of their low cost, tunable structure, high stability, and good catalytic activity. However, there are two main challenges for most perovskite oxides to be efficient in OER, namely less active sites and low electrical conductivity, leading to limited catalytic performance. To overcome these intrinsic obstacles,...
Perovskite Oxide‐Based Electrocatalysts
In article number 2101605, Shi Chen, Shuangpeng Wang, Guichuan Xing, Hui Pan, and co‐workers systematically summarize perovskite oxides as electrocatalysts for efficient oxygen evolution reaction (OER). The catalytic mechanism and descriptors for perovskite oxides are also discussed in detail. Additionally, various strategies to improve the OER catalytic performance...
Hydrogen evolution reaction (HER) is a key step for electrochemical energy conversion and storage. Developing well defined nanostructures as noble‐metal‐free electrocatalysts for HER is promising for the application of hydrogen technology. Herein, it is reported that 3D porous hierarchical CoNiP/CoxP multi‐phase heterostructure on Ni foam via an electrodeposition method followed by phosphorization...
Modern nanotechnologies bring humanity to a new age, and advanced methods for preparing functional nanocrystals are cornerstones. A considerable variety of nanomaterials has been created over the past decades, but few were prepared on the macro scale, even fewer making it to the stage of industrial production. The gap between academic research and engineering production is expected to be filled by...
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