Neighboring Platinum Atomic Sites Activate Platinum–Cobalt Nanoclusters as High‐Performance ORR/OER/HER Electrocatalysts

Small, Journal Year: 2023, Volume and Issue: 19(47)

Published: July 25, 2023

The rational design of efficient and multifunctional electrocatalysts for energy conversion devices is one the major challenges clean renewable transition. Herein, local electronic structure cobalt-platinum nanoclusters regulated by adjacent platinum atomic site encapsulated in N-doped hollow carbon nanotubes (PtSA -PtCo NCs/N-CNTs) pyrolysis melamine-orientation-induced zeolite imidazole metal-organic frameworks (ZIF-67) with thimbleful doping. introduction melamine can reactivate atoms initiate oriented growth nitrogen-doped nanotubes. systematic analysis suggests significant role neighboring low-coordinated Pt─N2 altering localized PtCo nanoclusters. optimized PtSA NCs/N-CNTs-900 exhibit excellent hydrogen evolution reaction (HER)/oxygen (OER)/oxygen reduction (ORR)/ catalytic performance reaching current density 10 mA cm-2 1 m KOH under low 47 (HER) 252 mV (OER) overpotentials, a high half-wave potential 0.86 0.89 V (ORR) 0.1 HClO4 , respectively. Remarkably, NC/N-CNT-900 also presents outstanding performances toward water splitting rechargeable Zn-air batteries. theoretical calculations reveal that optimal regulation Pt reduces barrier electrochemical process, facilitating ORR/OER/HER performance.

Language: Английский

---

Tunable Built‐In Electric Field in Ru Nanoclusters‐Based Electrocatalyst Boosts Water Splitting and Simulated Seawater Electrolysis

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(7)

Published: Oct. 31, 2023

Abstract The development of bifunctional electrocatalysts suitable for a wide pH range and seawater splitting under simulated industrial electrolysis conditions is expected to advance practical applications clean hydrogen energy. Here, the study reports built‐in electric field approach assemble heterogeneous Ru nanoclusters (Ru NCs) anchored in P,O co‐doped NiFe layered double hydroxide NCs/P,O‐NiFe LDH) overall water splitting. It revealed that BEF ensures electron enrichment via unidirectional transfer from P,O‐NiFe LDH due difference corresponding Fermi levels. optimized LDH/NF shows excellent electrocatalytic activity toward evolution reaction, oxygen range, as well industry‐relevant conditions. long‐term catalyst stability high currents process temperatures also demonstrated. Density functional theory calculations further confirm active sites at interface effectively reduce energy barrier electrolysis, thereby facilitating processes.

Language: Английский

---

Multi-interfacial dendritic engineering facilitating congruous intrinsic activity of oxide-carbide/MOF nanostructured multimodal electrocatalyst for hydrogen and oxygen electrocatalysis

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 331, P. 122711 - 122711

Published: March 30, 2023

Language: Английский

---

Recent advances in noble metal-free electrocatalysts to achieve efficient alkaline water splitting

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(20), P. 11771 - 11820

Published: Jan. 1, 2024

Electrochemical water splitting is one of the promising approaches for generating hydrogen.

Language: Английский

---

Unveiling the Role of Surface Self‐Reconstruction of Metal Chalcogenides on Electrocatalytic Oxygen Evolution Reaction

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 10, 2024

Abstract Transition metal chalcogenides are an important class of electrocatalysts with broad application prospects in alkaline oxygen evolution reactions. Many researchers focusing on the situ conversion cations catalysts, but have rarely considered contribution oxidation, leaching, and re‐absorption to catalytic activity. Herein, multiple characterization approaches used monitor mechanism origin CoTe@CoS‐electrocatalyzed reaction (OER) The research results reveal that electro‐oxidative dissolution Te S electrode surface forms TeO 3 2− SO , which adsorbed surface. Moreover, species will further transform into 4 . As expected, extra addition mixed tellurite sulfate ions Co (OH) 2 electrolyte produces a synergistic effect can significantly boost OER Selenites analogous effect, indicating adsorption chalcogenates has universal improving performance. findings this work provide unique insights materials enhancing activity during processes.

Language: Английский

---

Reversing the Interfacial Electric Field in Metal Phosphide Heterojunction by Fe‐Doping for Large‐Current Oxygen Evolution Reaction

Advanced Science, Journal Year: 2024, Volume and Issue: 11(21)

Published: April 8, 2024

Abstract Developing non‐precious‐metal electrocatalysts that can operate with a low overpotential at high current density for industrial application is challenging. Heterogeneous bimetallic phosphides have attracted much interest. Despite hydrogen evolution reaction (HER) performance, the ordinary oxygen (OER) performance hinders their practical use. Herein, it shown Fe‐doping reverses and enlarges interfacial electrical field heterojunction, turning H intermediate favorable binding sites HER into O OER. Specifically, self‐supported heterojunction catalysts on nickel foam (CoP@Ni 2 P/NF Fe‐CoP@Fe‐Ni P/NF) are readily synthesized. They only require overpotentials of 266 274 mV to drive large 1000 mA cm −2 ( j ) OER, respectively. Furthermore, water splitting cell equipped these electrodes requires voltage 1.724 V excellent durability, demonstrating potential application. This work offers new insights engineering catalysts.

Language: Английский

---

Promoting Electrocatalytic Oxygen Reactions Using Advanced Heterostructures for Rechargeable Zinc–Air Battery Applications

ACS Nano, Journal Year: 2024, Volume and Issue: 18(33), P. 21651 - 21684

Published: Aug. 12, 2024

In order to facilitate electrochemical oxygen reactions in electrically rechargeable zinc-air batteries (ZABs), there is a need develop innovative approaches for efficient electrocatalysts. Due their reliability, high energy density, material abundance, and ecofriendliness, ZABs hold promise as next-generation storage conversion devices. However, the large-scale application of currently hindered by slow kinetics reduction reaction (ORR) evolution (OER). development heterostructure-based electrocatalysts has potential surpass limitations imposed intrinsic properties single material. This Account begins with an explanation configurations fundamentals electrochemistry air electrode. Then, we summarize recent progress respect variety heterostructures that exploit bifunctional electrocatalytic overview impact on ZAB performance. The range heterointerfacial engineering strategies improving ORR/OER performance includes tailoring surface chemistry, dimensionality catalysts, interfacial charge transfer, mass transport, morphology. We highlight multicomponent design take these features into account create advanced highly active catalysts. Finally, discuss challenges future perspectives this important topic aim enhance activity batteries.

Language: Английский

---

Cobalt–manganese sulfide hybridized Fe-doped 1T-Vanadium disulfide 3D-Hierarchical core-shell nanorods for extreme low potential overall water-splitting

Materials Today Nano, Journal Year: 2022, Volume and Issue: 20, P. 100272 - 100272

Published: Sept. 27, 2022

Language: Английский

---

Phytic acid empowered two nanos “Polypyrrole tunnels and transition Metal-(Oxy)hydroxide Sheets” in a single platform for unmitigated redox water splitting

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 463, P. 142280 - 142280

Published: March 16, 2023

Language: Английский

---

NiCo layered double hydroxides/NiFe layered double hydroxides composite (NiCo-LDH/NiFe-LDH) towards efficient oxygen evolution in different water matrices

Chemosphere, Journal Year: 2023, Volume and Issue: 345, P. 140472 - 140472

Published: Oct. 16, 2023

Language: Английский

---