Next Materials, Год журнала: 2024, Номер 6, С. 100463 - 100463
Опубликована: Дек. 21, 2024
Язык: Английский
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 28, 2025
Abstract Developing highly efficient catalysts to accelerate sluggish electrode reactions is critical for the deployment of sustainable aqueous electrochemical technologies, yet remains a great challenge. Rationally integrating functional components tailor surface adsorption behaviors and adsorbate dynamics would divert reaction pathways alleviate energy barriers, eliminating conventional thermodynamic constraints ultimately optimizing flow within systems. This approach has, therefore, garnered significant interest, presenting substantial potential developing that simultaneously enhance activity, selectivity, stability. The immense promise rapid evolution this design strategy, however, do not overshadow challenges ambiguities persist, impeding realization breakthroughs in electrocatalyst development. review explores latest insights into principles guiding catalytic surfaces enable favorable contexts hydrogen oxygen electrochemistry. Innovative approaches tailoring adsorbate‐surface interactions are discussed, delving underlying govern these dynamics. Additionally, perspectives on prevailing presented future research directions proposed. By evaluating core identifying gaps, seeks inspire rational design, discovery novel mechanisms concepts, ultimately, advance large‐scale implementation electroconversion technologies.
Язык: Английский
Процитировано
3
Journal of the American Chemical Society, Год журнала: 2024, Номер unknown
Опубликована: Окт. 28, 2024
Enhancing the activity and CO poisoning resistance of Pt-based catalysts for anodic hydrogen oxidation reaction (HOR) poses a significant challenge in development proton exchange membrane fuel cells. Herein, we leverage theoretical calculations to demonstrate that tungsten nitride (WN) can intricately modulate electronic structure Pt. This modulation optimizes adsorption, significantly boosting HOR activity, simultaneously weakens markedly improving poisoning. Through prescreening with rational design, synthesized an efficient catalyst comprising minimal Pt content (only 1.4 wt %) supported on small-sized WN/reduced graphite oxide (Pt@WN/rGO). As anticipated, this showcases remarkable acidic mass 3060 A g
Язык: Английский
Процитировано
9
Green Energy & Environment, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
1
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 3, 2025
Abstract The upcycling of polyethylene terephthalate (PET)‐derived ethylene glycol (EG) to glycolic acid (GA, a biodegradable polymer monomer) via electrocatalysis not only produces valuable chemicals but also mitigates plastic pollution. However, the current reports for electrooxidation EG‐to‐GA usually operate at reaction potentials >1.0 V vs reversible hydrogen electrode (RHE), much higher than theoretical potential (0.065 RHE), resulting in substantial energy wastage. Herein, body‐centered cubic RhIn intermetallic compounds (IMCs) anchored on carbon support (denoted as RhIn/C) are synthesized, which shows excellent performance with an onset 0.35 RHE, lower values reported literature. catalyst possesses satisfactory GA selectivity (85% 0.65 RHE). Experimental results combined density functional theory calculations demonstrate that IMCs enhance adsorption EG and OH − , facilitating generation reactive oxygen species thereby improving catalytic performance. RhIn/C exhibits electrocatalytic evolution reaction, ensuring it can be used bifunctional two‐electrode system coupled production. This work opens new avenues reducing consumption PET‐derived clean
Язык: Английский
Процитировано
1
Journal of the American Chemical Society, Год журнала: 2025, Номер 147(6), С. 5398 - 5407
Опубликована: Янв. 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.
Язык: Английский
Процитировано
0
Advanced Energy Materials, Год журнала: 2025, Номер unknown
Опубликована: Фев. 10, 2025
Abstract Developing highly active and CO‐resistant Ru‐based catalysts for the alkaline hydrogen oxidation reaction (HOR) can advance large‐scale application of fuel cells but remains a huge challenge. Herein, pure phase W 2 C supported Ru cluster catalyst (Ru/W C) is successfully synthesized through one‐step carburization method. It found that charge transfer from to strongly anchored clusters forms electron‐rich δ− sites electron‐deficient δ+ sites, which significantly weakens adsorption strength * H CO, strengthens binding OH improves water connectivity in electric double layer. The Ru/W shows superior mass activity (2163 mA mg PGM −1 ) HOR, 12.52 20.62 times higher than Pt/C Ru/C, respectively. Owing weak fast removal rate exhibits outstanding CO tolerance, with 88% initial being retained durability test, whereas Ru/C suffer severe deactivation. These findings may guide design advanced HOR based on tungsten carbide.
Язык: Английский
Процитировано
0
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 6, 2025
Ruthenium (Ru) is a more cost-effective alternative to platinum anode catalysts for alkaline anion-exchange membrane fuel cells (AEMFCs), but suffers from severe competitive adsorption of hydrogen (Had) and hydroxyl (OHad). To address this concern, strongly coupled multisite electrocatalyst with highly active cluster-scale ruthenium-tungsten oxide (Ru-WOx) interface, which could eliminate the phenomenon achieve high coverage OHad Had at Ru WOx domains, respectively, designed. The experimental theoretical results demonstrate that domain functions as proton sponge perpetually accommodate activated species spillover adjacent domain, resulting WO-Had are readily Ru-OHad heterointerface finish oxidation reaction faster kinetics via thermodynamically favorable Tafel-Volmer mechanism. AEMFC delivers peak power density 1.36 W cm-2 low catalyst loading 0.05 mgRu outstanding durability (negligible voltage decay over 80-h operation 500 mA cm-2). This work offers completely new insights into understanding HOR mechanism designing advanced AEMFCs.
Язык: Английский
Процитировано
0
Frontiers in Energy, Год журнала: 2025, Номер unknown
Опубликована: Март 5, 2025
Язык: Английский
Процитировано
0
Small Methods, Год журнала: 2025, Номер unknown
Опубликована: Март 19, 2025
Abstract Reducing platinum (Pt) usage and enhancing its catalytic performance in the hydrogen oxidation reaction (HOR) oxygen reduction (ORR) are vital for advancing fuel cell technology. This study presents design investigation of monolayer few‐layer Pt structures with high utilization, developed through theoretical calculations. By minimizing metal thickness from 1 to 3 atomic layers, an utilization rate ranging 66.66% 100% is achieved, contrast conventional multilayer structures. resulted a unique surface coordination environment. These thinner exhibited nonlinear fluctuations key electronic characteristics—such as d‐band center, charge, work function—as layer decreased. variations significantly impacted species adsorption Pt‐H 2 O interfacial structure, which turn affected activity. Notably, 1‐layer best HOR, while 3‐layer showed activity both HOR ORR. The findings establish clear relationship between thickness, characteristics, behavior, electric double‐layer systems. research contributes deeper understanding precision atomic‐structured electrocatalyst paves way development highly effective, low‐loading Pt‐based materials.
Язык: Английский
Процитировано
0
Advanced Science, Год журнала: 2025, Номер unknown
Опубликована: Март 18, 2025
Abstract The hydrogen oxidation reaction (HOR) in alkaline media is pivotal for the advancement of anion exchange membrane fuel cells (AEMFCs), and development single‐atom catalysts offers a promising solution creating cost‐effective, highly efficient HOR catalysts. Although transition from nanoparticle to enhances catalytic activity, stability these sites remains significant challenge. In this study, active stable catalyst successfully designed by incorporating Ru atoms into ZrO 2‐x /C nanoparticles, forming single Ru‐SA‐ZrO /C. exhibits an outstanding mass activity 6789.4 mA mg −1 at 50 mV, surpassing Ru/C 67 fold commercial Pt/C 42.5 fold. Density functional theory (DFT) simulations reveal that integration optimizes both bonding energy (HBE) hydroxyl binding (OHBE), reducing toxicity sites. This research opens new pathway precise design metal hybrids, offering direction developing electrocatalysts applications.
Язык: Английский
Процитировано
0