Ternary MoWNi Alloy as a Bifunctional Catalyst for Alkaline Hydrogen Oxidation and Evolution Reactions DOI Open Access
Yongxin Zhao,

Chaofan Tian,

Yuzhu Zhai

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 15(1), P. 15 - 15

Published: Dec. 27, 2024

The hydrogen economy, as an emerging paradigm for sustainable energy, relies on efficient oxidation (HOR) and evolution reactions (HER). These require effective catalysts to enhance reaction kinetics reduce costs. Platinum (Pt) is widely used but faces issues such high cost CO poisoning. Non-precious metal catalysts, particularly Ni-based alloys, are being explored viable alternatives. This study introduces a ternary MoWNi alloy catalyst synthesized via microwave-assisted methods annealing. achieves current density of 3.5 mA·cm−2 at overpotential 100 mV in HOR requires only 25 reach 10 HER, making it comparable commercial 20% Pt/C catalysts. Notably, the also exhibits superior stability resistance toxicity. findings underscore potential advancing hydrogen-based energy systems.

Language: Английский

Harnessing Hydrogen Spillover by Lattice Strain for Enhanced Photocatalytic Hydrogen Evolution of ZnIn2S4 DOI
Fan Gao, Wen‐Gang Cui, Xinqiang Wang

et al.

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 2367 - 2379

Published: Jan. 25, 2025

Language: Английский

Citations

3

Electrocatalysis: From Planar Surfaces to Nanostructured Interfaces DOI Creative Commons
Alasdair Fairhurst, Joshua Snyder, Chao Wang

et al.

Chemical Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

The reactions critical for the energy transition center on chemistry of hydrogen, oxygen, carbon, and heterogeneous catalyst surfaces that make up electrochemical conversion systems. Together, surface-adsorbate interactions constitute interphase define reaction kinetics many clean technologies. Practical devices introduce high levels complexity where surface roughness, structure, composition, morphology combine with electrolyte, pH, diffusion, system level limitations to challenge our ability deconvolute underlying phenomena. To significant strides in materials design, a structured approach based well-defined is necessary selectively control distinct parameters, while added sequentially through careful application nanostructured surfaces. In this review, we cover advances made key elements field, beginning simplest hydrogen oxidation evolution concluding more complex organic molecules. each case, offer unique perspective contribution systems understanding technologies how wider deployment can aid intelligent design.

Language: Английский

Citations

2

Switching alkaline hydrogen oxidation reaction pathway via microenvironment modulation of Ru catalysts DOI
Jie Gao,

Lishuai Qin,

Mengdi Wang

et al.

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 689, P. 137215 - 137215

Published: March 3, 2025

Language: Английский

Citations

1

Electric-Double-Layer Mechanism of Surface Oxophilicity in Regulating the Alkaline Hydrogen Electrocatalytic Kinetics DOI

Yaling Jiang,

Peimeng Qiu,

Qinghua Liu

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Regulating the surface oxophilicity of electrocatalyst is known as an efficient strategy to mitigate order-of-magnitude kinetic slowdown hydrogen electrocatalysis in a base, which great scientific and technological significance. So far, its mechanistic origin remains mainly ascribed bifunctional or electronic effects that revolve around catalyst-intermediate interactions under extensive debate. In addition, understanding from perspective interfacial electric-double-layer (EDL) structures, should also strongly depend on electrode property, still lacking. Here, by decorating Pt with Mo, Ru, Rh, Au metal atoms tune systematically combining electrochemical activity tests, situ surface-enhanced infrared absorption spectroscopy, density functional theory calculation, ab initio molecular dynamics simulation, we found there exist consistent volcano-type relationships between *OH adsorption strength alkaline evolution activity, stretching/bending vibration information water, potential zero charge (PZC) electrode. This demonstrates impacting electrocatalytic lies modification toward PZC, thereby dictates electric field strength, rigidity, bonding network structure EDL ultimately governs proton transfer kinetics. These findings emphasize importance focusing interface structures understand property-dependent reaction

Language: Английский

Citations

1

Rational Ligand Design of Conjugated Coordination Polymers for Efficient and Selective Nitrate Electroreduction to Ammonia DOI
S. Zhang, Yan Liu,

Yidan Ding

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract Electrocatalytic nitrate reduction to ammonia (NRA) offers an attractive route for converting pollutants under mild conditions. Among other catalysts, single‐atom catalysts (SACs) with high metal‐atom‐utilization efficiency and low‐coordinated metal sites hold immense potential be extensively applied, which unfortunately encounter a formidable challenge obtain simultaneous improvement of NRA activity selectivity. Here, novel general strategy is reported achieve efficient selective catalysis on conjugated coordination polymers featuring high‐density well‐defined nitrogen (N)‐coordinated via precise regulation N‑heterocyclic ligands toward accelerating the hydrogenation kinetics necessitated in pathway. Taking cobalt (Co) as example, two CoN 4 ‐centered polymer electrocatalysts (CoN ‐pyrr ‐pyri) are synthesized pyrrole pyridine investigated proof‐of‐concept study. As revealed, can markedly outperform ‐pyri electrocatalysis. Experimental theoretical results suggest that, relative N atoms ligand ‐pyri, enable faster transfer hydrogen radicals Co active * NO intermediate at rate‐determining step

Language: Английский

Citations

1

Rhodamine-functionalized carbon dots with pH-regulated FRET efficiency for ratiometric fluorescence sensing and imaging of extremely alkaline pH DOI
Jingyuan Zhang, Dan Wang, Jia Li

et al.

Microchimica Acta, Journal Year: 2025, Volume and Issue: 192(2)

Published: Jan. 28, 2025

Language: Английский

Citations

0

Pd1Ni2 Trimer Sites Drive Efficient and Durable Hydrogen Oxidation in Alkaline Media DOI
Shuqi Wang, Ze‐Cheng Yao,

Zhuo‐Qi Shi

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: 147(6), P. 5398 - 5407

Published: Jan. 31, 2025

Anion-exchange membrane fuel cell (AEMFC) is a cost-effective hydrogen-to-electricity conversion technology under zero-emission scenario. However, the sluggish kinetics of anodic hydrogen oxidation reaction (HOR) impedes commercial implementation AEMFCs. Here, we develop Pd single-atom-embedded Ni3N catalyst (Pd1/Ni3N) with unconventional Pd1Ni2 trimer sites to drive efficient and durable HOR in alkaline media. Integrating theoretical experimental analyses, demonstrate that dual achieve "*H on Pd1Ni2-HV + *OH Pd1Ni2-HN" adsorption mode, effectively weakening overstrong *H adsorptions pristine Ni3N. Owing unique coordination mode atomically dispersed catalytic sites, resulting Pd1/Ni3N delivers high intrinsic mass activity together excellent antioxidation capability CO tolerance. Specifically, reaches 7.54 A mgPd-1 at overpotential 50 mV. The AEMFC employing as anode displays power density 31.7 W an ultralow precious metal loading only 0.023 mgPd cm-2. This study provides guidance for design high-performance atomic level.

Language: Английский

Citations

0

Carbonized Wood Decorated with Ternary Heterogeneous MoS2–MoP–Mo2C Nanoparticles for pH-Universal Hydrogen Evolution DOI
Qiuyu Du,

Yaoxing Wang,

Xueqin Fan

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(9), P. 14025 - 14035

Published: Feb. 20, 2025

The assembly of diverse active materials significantly enhances the efficiency electrocatalytic hydrogen evolution reaction (HER). Herein, we prepare a three-phase composite structure electrocatalyst on carbonized wood, in which molybdenum carbide and phosphide are attached to sulfide nanosheets (MoS2-MoP-Mo2C@CW) through hydrothermal method combination with high-temperature calcination for pH-universal HER. MoS2 possesses abundant unsaturated coordination edge sites, thus facilitating adsorption desorption intermediate (H*). synergistic effect between MoS2, MoP featuring favorable electronic conductivity, Mo2C holding strong H* catalytic activity Moreover, wood hierarchical porous aligned microchannels accelerates mass transport during As result, molybdenum-based self-supported electrode exhibits outstanding HER performance low overpotentials 46, 84, 65 mV achieve current density 10 mA cm-2 corresponding Tafel slopes 57, 111 mV, 63 dec-1 alkaline, neutral, acidic environments, respectively. MoS2-MoP-Mo2C@CW also shows long-term durability 200 h over broad pH range at cm-2. This work provides an effective strategy development multiphase wood-based electrocatalysts

Language: Английский

Citations

0

Synergistic Modulation of Multisite Electronic States via Erbium Doping and NiCoP Hybridization for Enhanced Anion Exchange Membrane Water Splitting DOI
Fan Zhang, Huigang Zhang, Weiwei Han

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Water dissociation in anion exchange membrane water electrolysis (AEMWE) faces significant energy barriers, posing a challenge for reducing cell voltage. Herein, we engineered CoP nanosheets by doping Er and hybridizing with NiCoP to optimize local electronic states accelerate H2O during the hydrogen evolution reaction. The resulting Er0.1-CoP/NiCoP catalyst achieves low overpotential of 154 mV at -500 mA cm-2 1.0 M KOH. An AEM electrolyzer comprising an Er0.1-CoP/NiCoP@NF cathode demonstrates voltage 1.672 V stability exceeding 1000 h 500 (50 °C). Characterization, density functional theory (DFT) calculations, ab initio molecular dynamics (AIMD) simulations reveal that hybridization synergistically modulate charge distribution across multisites, shifting p-band centers away from Fermi level. These adjustments free H* adsorption (ΔGH*) improve OH*/H2O* adsorption, thereby facilitating H2 evolution.

Language: Английский

Citations

0

Regulating pore size of Co-P and Fe-Co-P mesoporous nanosheet array for coupling hydrogen evolution with Fenton reaction DOI
Shuai Li, Yimei Zhang

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132569 - 132569

Published: March 1, 2025

Language: Английский

Citations

0