The development of low-cost, high-efficiency, and robust electrocatalysts for the oxygen evolution reaction (OER) is urgently needed to address energy crisis. In recent years, non-noble-metal-based OER have attracted tremendous research attention. Beginning with introduction some evaluation criteria OER, current are reviewed, classification metals/alloys, oxides, hydroxides, chalcogenides, phosphides, phosphates/borates, other compounds, along their advantages shortcomings. knowledge...

Porous CoFe2 O4 /C NRAs supported on nickel foam@NC (denoted as NF@NC-CoFe2 NRAs) are directly fabricated by the carbonization of bimetal-organic framework grown NF@poly-aniline(PANI), and they exhibit high electrocatalytic activity, low overpotential, stability for oxygen evolution reaction in alkaline media.

Herein, we report the synthesis of uniform hollow nanorods Ni-doped FeP nanocrystals hybridized with carbon as electrocataysts for electrocatalytic hydrogen evolution reaction (HER). These are prepared based on etching and coordination between metal-organic frameworks phytic acid, followed by a pyrolysis process. Benefiting from abundant active sites, improved mass charge transport capability, optimized FeP/C exhibit excellent HER activities achieving current density 10 mA cm-2 at an...

Novel NiCo₂O₄NSs@HNRAs are fabricated<italic>via</italic>a simple and environmental friendly template-assisted electrodeposition followed by thermal annealing they exhibit predominant electrochemical properties long-term cycle stability.

Abstract Rational design and synthesis of highly active robust bifunctional non‐noble electrocatalysts for both oxygen evolution reaction (OER) reduction (ORR) are urgently required efficient rechargeable metal–air batteries. Herein, abundant MnO/Co heterointerfaces engineered in porous graphitic carbon (MnO/Co/PGC) polyhedrons via a facile hydrothermal‐calcination route with bimetal–organic framework as the precursor. The situ generated Co nanocrystals not only create well‐defined high...

Postsynthetic ion exchange of [Co2(μ-Cl)2(btta)] (MAF-X27-Cl, H2bbta =1H,5H-benzo(1,2-d:4,5-d′)bistriazole) possessing open metal sites on its pore surface yields a material [Co2(μ-OH)2(bbta)] (MAF-X27-OH) functionalized by both and hydroxide ligands, giving drastically improved electrocatalytic activities for the oxygen evolution reaction (an overpotential 292 mV at 10.0 mA cm–2 in 1.0 M KOH solution). Isotope tracing experiments further confirm that ligands are involved OER process to...

Prussian blue analogs (PBAs) are considered as reliable and promising cathode materials for aqueous Zn-ion batteries (AZIBs), but they suffer from low capacity poor cycling stability due to insufficient active sites structural damage caused by the ion insertion/extraction processes. Herein, a template-engaged exchange approach has been developed synthesis of Co-substituted Mn-rich PBA hollow spheres (CoMn-PBA HSs) AZIBs. Benefiting multiple advantageous features including structure, abundant...

Delicate design of nanostructures for oxygen-evolution electrocatalysts is an important strategy accelerating the reaction kinetics water splitting. In this work, Ni-Fe layered-double-hydroxide (LDH) nanocages with tunable shells are synthesized via a facile one-pot self-templating method. The number can be precisely controlled by regulating template etching at interface. Benefiting from double-shelled structure large electroactive surface area and optimized chemical composition,...

Abstract Electrocatalysts based on hierarchically structured and heteroatom‐doped non‐noble metal oxide materials are of great importance for efficient low‐cost electrochemical water splitting systems. Herein, the synthesis a series hierarchical hollow nanoplates (NPs) composed ultrathin Co 3 O 4 nanosheets doped with 13 different atoms is reported. The involves cooperative etching−coordination−reorganization approach starting from zeolitic imidazolate framework‐67 (ZIF‐67) NPs. First, atom...

Highly ordered three-dimensional α-Fe2O3@PANI core-shell nanowire arrays with enhanced specific areal capacity and rate performance are fabricated by a simple cost-effective electrodeposition method. The provide large reaction surface area, fast ion electron transfer, good structure stability, which all beneficial for improving the electrochemical performance. Here, high-performance asymmetric supercapacitors (ASCs) designed using as anode PANI nanorods grown on carbon cloth cathode, they...

Designing novel non-noble electrocatalysts with controlled structures and composition remains a great challenge for efficient hydrogen evolution reaction (HER). Herein, rational synthesis of ultrafine carbide nanocrystals confined in porous nitrogen-doped carbon dodecahedrons (PNCDs) by annealing functional zeolitic imidazolate framework (ZIF-8) molybdate or tungstate is reported. By controlling the substitution amount MO4 units (M = Mo W) ZIF-8 framework, dual-phase PNCDs (denoted as MC-M2...

Abstract Electrochemical reduction of CO 2 could mitigate environmental problems originating from emission. Although grain boundaries (GBs) have been tailored to tune binding energies reaction intermediates and consequently accelerate the (CO RR), it is challenging exclusively clarify correlation between GBs enhanced reactivity in nanostructured materials with small dimension (&lt;10 nm). Now, sub‐2 nm SnO quantum wires (QWs) composed individual dots (QDs) numerous on surface were...

Abstract Bi 2 O 3 nanosheets were grown on a conductive multiple channel carbon matrix (MCCM) for CO RR. The obtained electrocatalyst shows desirable partial current density of ca. 17.7 mA cm −2 at moderate overpotential, and it is highly selective towards HCOOH formation with Faradaic efficiency approaching 90 % in wide potential window its maximum value 93.8 −1.256 V. It also exhibits energy 55.3 an overpotential 0.846 V long‐term stability 12 h negligible degradation. superior performance...

Abstract TiO 2 Co nanotubes decorated with nanodots (TiO NDs/Co NSNTs‐CFs) are reported as high‐performance earth‐abundant electrocatalysts for the hydrogen evolution reaction (HER) in alkaline solution. NSNTs can promote water adsorption and optimize free energy of adsorption. More importantly, absorbed be easily activated presence –Co hybrid structure. These advantages will significantly HER. NSNTs‐CFs show a high catalytic performance towards HER This study open up new avenue designing...

Abstract The development of efficient and low‐cost electrocatalysts toward the oxygen evolution reaction (OER) is critical for improving efficiency several electrochemical energy conversion storage devices. Here, we report an elaborate design synthesis porous Co‐based trimetallic spinel oxide nanoboxes (NiCo 2− x Fe O 4 NBs) by a novel metal‐organic framework engaged strategy, which involves chemical etching, cation exchange, subsequent thermal oxidation processes. Owing to structural...

Developing noble-metal-free bifunctional oxygen electrocatalysts is of great significance for energy conversion and storage systems. Herein, we have developed a transformation method growing NiMn-based bimetal-organic framework (NiMn-MOF) nanosheets on multi-channel carbon fibers (MCCF) as electrocatalyst. Owing to the desired components architecture, MCCF/NiMn-MOFs manifest comparable electrocatalytic performance towards reduction reaction (ORR) with commercial Pt/C electrocatalyst superior...

PdCo nanotube arrays (NTAs) supported on carbon fiber cloth (CFC) (PdCo NTAs/CFC) are presented as high-performance flexible electrocatalysts for ethanol oxidation. The fabricated NTAs/CFC exhibits significantly improved electrocatalytic activity and durability compared with Pd commercial Pd/C catalysts. Most importantly, the shows excellent flexibility high performance remains almost constant under different distorted states, such normal, bending, twisting states. This work first example of...

The effective intramolecular electronic coupling between the Fe and Co atoms <italic>via</italic> P/O bridges greatly enhances electrocatalytic activity of Fe–Co (oxy)phosphide nanoboxes.

Abstract Delicate modulations of CO 2 activation and charge carrier separation/migration are challenging, yet imperative to augment photoreduction efficiency. Herein, by supporting diethylenetriamine (DETA)‐functionalized Cd 0.8 Zn 0.2 S nanowires on the exterior surface hollow Co 9 8 polyhedrons, hierarchical @Cd S‐DETA nanocages fabricated as an S‐scheme photocatalyst for reducing protons produce syngas (CO H ). The amine groups strengthen adsorption , while “nanowire‐on‐nanocage”...

Abstract Exploring earth‐abundant electrocatalysts with excellent activity, robust stability, and multiple functions is crucial for electrolytic hydrogen generation. Porous phosphorized CoNi 2 S 4 yolk‐shell spheres (P‐CoNi YSSs) were rationally designed synthesized by a combined hydrothermal sulfidation gas‐phase phosphorization strategy. Benefiting from the strengthened Ni 3+ /Ni 2+ couple, enhanced electronic conductivity, hollow structure, P‐CoNi YSSs exhibit activity durability towards...

Abstract Limited by the sluggish four‐electron transfer process, designing high‐performance nonprecious electrocatalysts for oxygen evolution reaction (OER) and reduction (ORR) is urgently desired efficient rechargeable Zn–air batteries (ZABs). Herein, successful synthesis of porous nitrogen‐doped cobalt pyrite yolk–shell nanospheres (N‐CoS 2 YSSs) reported. Benefiting from abundant porosity structure unique electronic properties nitrogen doping, as‐prepared N‐CoS YSSs possess more exposed...